@import url('tokens.css');

:root {
  /* ПРОСВЕТ brand guide */
  --brand-navy: #0D1B2A;
  --brand-navy-2: #1B3A5E;
  --brand-action: #2D6CDF;
  --brand-teal: #18B0B8;
  --brand-bg: #F2F4F7;

  --bg: #F2F4F7;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-muted: #eef1f5;
  --surface-strong: #e2e7ee;
  --ink: #0D1B2A;
  --ink-soft: #1B3A5E;
  --ink-faint: #6b7c90;
  --line: #dde3eb;
  --line-strong: #c5ced9;
  --accent: #2D6CDF;
  --accent-strong: #1B3A5E;
  --accent-hover: var(--accent-strong);
  --accent-soft: rgba(45, 108, 223, 0.12);
  --accent-ink: #ffffff;
  --accent-secondary: #18B0B8;
  --teal: #18B0B8;
  --teal-soft: rgba(24, 176, 184, 0.14);
  --callout-bg: #eef5ff;
  --callout-line: #2D6CDF;
  --warm: #8a6a1f;
  --warm-soft: rgba(138, 106, 31, 0.1);
  --danger: #C62828;
  --danger-soft: rgba(198, 40, 40, 0.1);
  --ok: #1a6b42;
  --ok-soft: rgba(26, 107, 66, 0.1);
  --warn: #8a5a10;
  --warn-soft: rgba(138, 90, 16, 0.1);
  --radius-xs: 5px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-chip: 5px;
  --container: 1320px;
  --control-h: 44px;
  /* Nav chrome: compact so main course/editor column keeps usable width at 100% zoom */
  --sidebar-w: 248px;
  --course-settings-w: 340px;
  --reader-side-w: 240px;
  --shadow-1: 0 1px 2px rgba(13, 27, 42, 0.04), 0 4px 14px rgba(13, 27, 42, 0.05);
  --shadow-2: 0 12px 32px rgba(13, 27, 42, 0.1);
  --font: "Montserrat", "Golos Text", "Segoe UI", system-ui, sans-serif;
  --bs-body-font-family: var(--font);
  --bs-body-color: var(--ink);
  --bs-body-bg: var(--bg);
  --bs-primary: #2D6CDF;
  --bs-primary-rgb: 45, 108, 223;
  --bs-link-color: #2D6CDF;
  --bs-border-color: var(--line);
  --bs-border-radius: 12px;
  --bs-border-radius-sm: 10px;
  --bs-border-radius-lg: 18px;
  --bs-border-radius-xl: 22px;
  --bs-border-radius-pill: 50rem;
  --bs-font-sans-serif: var(--font);
}

[data-theme="dark"],
[data-bs-theme="dark"] {
  --bg: #0a121c;
  --bg-elevated: #101a27;
  --surface: #132033;
  --surface-muted: #1a2a40;
  --surface-strong: #243652;
  --ink: #eef2f7;
  --ink-soft: #b0bfd0;
  --ink-faint: #7d8fa3;
  --line: #243652;
  --line-strong: #314862;
  --accent: #4d86ef;
  --accent-strong: #18B0B8;
  --accent-hover: var(--accent-strong);
  --accent-soft: rgba(77, 134, 239, 0.16);
  --accent-ink: #ffffff;
  --accent-secondary: #2ec4cc;
  --teal: #2ec4cc;
  --teal-soft: rgba(46, 196, 204, 0.16);
  --callout-bg: rgba(77, 134, 239, 0.12);
  --callout-line: #4d86ef;
  --warm: #c9a227;
  --warm-soft: rgba(201, 162, 39, 0.12);
  --danger: #e07070;
  --danger-soft: rgba(224, 112, 112, 0.12);
  --ok: #4caf82;
  --ok-soft: rgba(76, 175, 130, 0.12);
  --warn: #d4a84a;
  --warn-soft: rgba(212, 168, 74, 0.12);
  --bs-body-color: var(--ink);
  --bs-body-bg: var(--bg);
  --bs-primary: #4d86ef;
  --bs-primary-rgb: 77, 134, 239;
  --bs-link-color: #6b9cf3;
  --bs-border-color: var(--line);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
[data-theme="dark"] body,
[data-bs-theme="dark"] body {
  background: var(--bg);
}
.page-main { flex: 1; }
img { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, textarea, select { font: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
::selection { background: var(--accent-soft); }

.display, h1.display {
  margin: 0;
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  font-size: clamp(1.55rem, 2.8vw, 2.1rem);
  color: var(--ink);
}
h1, h2, h3 {
  color: var(--ink);
  font-family: var(--font);
  font-weight: 600;
  letter-spacing: 0;
}
h2 { margin: 0; font-size: 1.2rem; }
h3 { margin: 0 0 .35rem; font-size: 1rem; }
.eyebrow {
  margin: 0 0 .3rem;
  color: var(--ink-faint);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}
.lead { max-width: 66ch; color: var(--ink-soft); font-size: 1.05rem; }
.muted { color: var(--ink-soft); }
.mono, code, pre { font-family: ui-monospace, Consolas, "Courier New", monospace; }
.hidden { display: none !important; }
.center { text-align: center; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface);
  border-bottom: 2px solid var(--line);
}
[data-theme="dark"] .topbar { background: var(--surface); }
.topbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: .85rem 1.1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  color: var(--ink);
  font-family: var(--font);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -.01em;
}
.brand:hover { text-decoration: none; }
.brand-mark,
.brand-mark.big {
  background: center / cover no-repeat url("/static/branding/brand-icon.png");
  flex: none;
}
.brand-mark { width: 32px; height: 32px; border-radius: var(--radius-sm); border: 1px solid var(--line); }
.brand-mark.big { width: 88px; height: 88px; margin: 0 auto 1rem; border: 1px solid var(--line); }
.brand-mark-wrap {
  width: 36px;
  height: 36px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 11px;
  overflow: hidden;
  background: transparent;
}

.brand-title {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  gap: .05rem;
}
.brand-title-main { font-weight: 700; font-size: 1.05rem; }
.brand-title-org {
  font-size: .72rem;
  font-weight: 500;
  color: var(--ink-soft);
  max-width: 220px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.auth-logo {
  max-height: 72px;
  width: auto;
  object-fit: contain;
  margin: 0 auto 0.75rem;
  border: none !important;
  background: transparent;
}
.nav { display: flex; align-items: center; gap: .5rem; margin-left: auto; flex-wrap: wrap; }
.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 .85rem;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  font-weight: 600;
  font-size: .94rem;
}
.nav-link:hover {
  background: var(--surface-muted);
  color: var(--ink);
  text-decoration: none;
}
.badge,
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin-left: .2rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: .68rem;
  font-weight: 700;
  line-height: 1;
}
/* do not let Bootstrap .badge inherit our count-pill look on other uses */
.card .badge:not(.nav-badge) { /* noop keep cascade local */ }
.burger { display: none; }

.page {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.5rem 1.1rem 4rem;
}
.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.2rem;
  margin-bottom: 1.35rem;
  padding-bottom: .85rem;
  flex-wrap: wrap;
  position: relative;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 88%, var(--brand-teal, var(--teal)));
}
.page-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: min(4.5rem, 28%);
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--brand-navy, var(--ink)) 0%,
    var(--brand-teal, var(--teal)) 100%
  );
  border-radius: 1px;
}
.page-head .display,
.page-head .page-title {
  letter-spacing: -.025em;
}
.page-head .eyebrow {
  color: color-mix(in srgb, var(--ink-faint) 70%, var(--brand-teal, var(--teal)));
}
.footer {
  padding: 1.8rem 0 3rem;
  text-align: center;
  color: var(--ink-faint);
  font-size: .86rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow-1);
}
.stack { display: flex; flex-direction: column; gap: .8rem; }
.row { display: flex; gap: .5rem; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.row.tight { gap: .3rem; }
.row.between { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
/* Global input{width:100%} breaks flex rows: keep grow fields sharing space */
.row > input.grow,
.row > .grow:is(input),
.row input.grow {
  width: auto;
  max-width: none;
  flex: 1 1 auto;
  min-width: 0;
}
.row > label.grow {
  flex: 1 1 auto;
  min-width: 0;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.align-top { align-items: start; }
.section-title {
  margin: 0 0 .7rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
  font-weight: 600;
  letter-spacing: -.015em;
}

label {
  display: flex;
  flex-direction: column;
  gap: .42rem;
  color: var(--ink);
  font-size: .92rem;
  font-weight: 600;
}
label.check {
  flex-direction: row;
  align-items: center;
  gap: .65rem;
  font-weight: 500;
  cursor: pointer;
}
label.check input[type="checkbox"],
label.check input[type="radio"] {
  flex: 0 0 auto;
}
label.toggle-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 500;
  width: 100%;
}
input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="file"]):not([type="hidden"]):not([type="submit"]):not([type="button"]):not([type="reset"]),
textarea,
select {
  width: 100%;
  min-height: var(--control-h);
  padding: .72rem 1rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  appearance: none;
  transition: border-color .15s ease, background .15s ease, box-shadow .15s ease;
}
textarea { min-height: 130px; resize: vertical; }
input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="file"]):not([type="hidden"]):not([type="submit"]):not([type="button"]):not([type="reset"]):hover,
textarea:hover,
select:hover { border-color: var(--line-strong); }
input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="file"]):not([type="hidden"]):not([type="submit"]):not([type="button"]):not([type="reset"]):focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
  outline: none;
}
select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-color: var(--surface);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.2L8 10.2L12 6.2' stroke='%231B3A5E' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-position: right .85rem center;
  background-size: 16px 16px;
  background-repeat: no-repeat;
  padding-right: 2.55rem;
}
select::-ms-expand { display: none; }
.form-select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-color: var(--surface);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.2L8 10.2L12 6.2' stroke='%231B3A5E' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-position: right .85rem center;
  background-size: 16px 16px;
  background-repeat: no-repeat;
  padding-right: 2.55rem;
}
[data-theme="dark"] select,
[data-bs-theme="dark"] select,
[data-theme="dark"] .form-select,
[data-bs-theme="dark"] .form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.2L8 10.2L12 6.2' stroke='%23b0bfd0' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}
input[type="range"] {
  min-height: auto;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  accent-color: var(--accent);
}
input[type="checkbox"],
input[type="radio"] {
  width: 1.125rem;
  height: 1.125rem;
  min-width: 1.125rem;
  min-height: 1.125rem;
  max-width: 1.125rem;
  max-height: 1.125rem;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  appearance: auto;
  -webkit-appearance: auto;
  accent-color: var(--accent);
  flex: none;
  cursor: pointer;
  vertical-align: middle;
}
input[type="file"] {
  padding: .55rem .65rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  width: 100%;
}
input[type="file"]::file-selector-button {
  margin-right: .75rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  color: var(--surface);
  padding: .4rem .9rem;
  font-weight: 600;
  font-size: .82rem;
  cursor: pointer;
}
input[type="file"]::file-selector-button:hover {
  background: var(--ink);
}

/* Кастомное поле файла: скруглённая «капсула», без квадратной системной кнопки */
.file-field {
  position: relative;
  display: block;
  width: 100%;
  min-width: 0;
  cursor: pointer;
}
.file-field-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 999px;
}
.file-field-face {
  display: flex;
  align-items: center;
  gap: .65rem;
  min-height: 2.75rem;
  padding: .35rem .4rem .35rem .4rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 92%, var(--surface-muted));
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.file-field:hover .file-field-face,
.file-field:focus-within .file-field-face {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}
.file-field-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  flex: none;
  min-height: 2.05rem;
  padding: 0 .95rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--surface);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .01em;
  white-space: nowrap;
}
.file-field-btn .bi { font-size: .95rem; opacity: .9; }
.file-field-name {
  flex: 1;
  min-width: 0;
  padding-right: .75rem;
  font-size: .84rem;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-field.has-file .file-field-name { color: var(--ink); font-weight: 500; }
textarea.mono { font-size: .88rem; line-height: 1.55; }
.w90 { width: 90px; }
.w120 { width: 120px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  min-height: var(--control-h);
  padding: .55rem 1.15rem;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  font-weight: 600;
  font-size: .92rem;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: none;
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover {
  background: var(--surface-muted);
  border-color: var(--ink-faint);
  text-decoration: none;
  box-shadow: none;
}
.btn:active, .btn.is-pressed {
  background: var(--surface-strong);
  transform: translateY(1px) scale(.98);
}
.btn.is-busy { opacity: .72; pointer-events: none; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 28%, transparent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--accent-ink);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 34%, transparent);
}
.btn-primary:active, .btn-primary.is-pressed {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  filter: brightness(.94);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
.btn-danger { background: var(--surface); border-color: var(--danger); color: var(--danger); box-shadow: none; }
.btn-danger:hover { background: var(--danger-soft); }
.btn-danger:active, .btn-danger.is-pressed { background: color-mix(in srgb, var(--danger) 18%, var(--surface)); }
.btn-outline-danger {
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--danger) 55%, var(--line));
  color: var(--danger);
  box-shadow: none;
}
.btn-outline-danger:hover {
  background: var(--danger-soft);
  border-color: var(--danger);
  color: var(--danger);
  text-decoration: none;
}
.btn-secondary-accent {
  background: color-mix(in srgb, var(--accent-secondary, var(--teal)) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent-secondary, var(--teal)) 55%, transparent);
  color: var(--accent-secondary, var(--teal));
  box-shadow: none;
}
.btn-secondary-accent:hover {
  background: color-mix(in srgb, var(--accent-secondary, var(--teal)) 28%, transparent);
  border-color: var(--accent-secondary, var(--teal));
  color: var(--accent-secondary, var(--teal));
  text-decoration: none;
}
.course-hero-v3 .btn-secondary-accent {
  background: color-mix(in srgb, var(--brand-teal, var(--teal)) 22%, transparent);
  border-color: color-mix(in srgb, var(--brand-teal, var(--teal)) 70%, #fff);
  color: #e8fffe;
}
.course-hero-v3 .btn-secondary-accent:hover {
  background: color-mix(in srgb, var(--brand-teal, var(--teal)) 38%, transparent);
  color: #fff;
}
.btn-ok { background: var(--surface); border-color: var(--ok); color: var(--ok); box-shadow: none; }
.btn-ok:hover { background: var(--ok-soft); }
.btn-ok:active, .btn-ok.is-pressed { background: color-mix(in srgb, var(--ok) 18%, var(--surface)); }
.btn-outline, .btn-outline-secondary {
  background: transparent;
  color: var(--ink-soft);
  border-color: var(--line);
  box-shadow: none;
}
.btn-outline:hover, .btn-outline-secondary:hover {
  background: var(--surface-muted);
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-wide { width: 100%; border-radius: var(--radius-sm); }
.btn-big { min-height: 52px; padding-inline: 1.35rem; font-size: 1rem; }
.btn.sm, .btn-sm { min-height: 36px; padding: .35rem .95rem; font-size: .85rem; }
.icon-btn {
  width: 34px;
  min-width: 34px;
  height: 34px;
  padding: 0;
  border-radius: var(--radius-xs);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: .95rem;
  box-shadow: none;
  transition: background .15s, border-color .15s, color .15s, transform .12s, box-shadow .15s;
}
.icon-btn:hover {
  background: var(--surface-muted);
  color: var(--ink);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-1);
}
/* Outline CRUD: action-colored buttons (edit/move/delete/ok/cancel) */
.outline-act-edit {
  color: var(--warn);
  border-color: color-mix(in srgb, var(--warn) 42%, var(--line));
  background: var(--warn-soft);
}
.outline-act-edit:hover,
.outline-act-edit:focus-visible {
  color: var(--warn);
  border-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 18%, var(--surface));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--warn) 18%, transparent);
}
.outline-act-move {
  color: var(--bs-primary, #1d5fbf);
  border-color: color-mix(in srgb, var(--bs-primary, #1d5fbf) 38%, var(--line));
  background: color-mix(in srgb, var(--bs-primary, #1d5fbf) 10%, var(--surface));
}
.outline-act-move:hover,
.outline-act-move:focus-visible {
  color: var(--bs-primary, #1d5fbf);
  border-color: var(--bs-primary, #1d5fbf);
  background: color-mix(in srgb, var(--bs-primary, #1d5fbf) 16%, var(--surface));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--bs-primary, #1d5fbf) 16%, transparent);
}
.outline-act-delete {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 42%, var(--line));
  background: var(--danger-soft);
}
.outline-act-delete:hover,
.outline-act-delete:focus-visible {
  color: var(--danger);
  border-color: var(--danger);
  background: color-mix(in srgb, var(--danger) 16%, var(--surface));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--danger) 16%, transparent);
}
.outline-act-ok {
  color: var(--ok);
  border-color: color-mix(in srgb, var(--ok) 42%, var(--line));
  background: var(--ok-soft);
}
.outline-act-ok:hover,
.outline-act-ok:focus-visible {
  color: var(--ok);
  border-color: var(--ok);
  background: color-mix(in srgb, var(--ok) 16%, var(--surface));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--ok) 16%, transparent);
}
/* Rename cancel: muted at rest → red on hover (same danger cue as delete) */
.outline-act-cancel {
  color: var(--ink-soft);
  border-color: var(--line);
  background: var(--surface);
}
.outline-act-cancel:hover,
.outline-act-cancel:focus-visible {
  color: var(--danger);
  border-color: var(--danger);
  background: color-mix(in srgb, var(--danger) 16%, var(--surface));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--danger) 16%, transparent);
}
.outline-act-open {
  color: var(--brand-teal, #18B0B8);
  border-color: color-mix(in srgb, var(--brand-teal, #18B0B8) 36%, var(--line));
  background: color-mix(in srgb, var(--brand-teal, #18B0B8) 10%, var(--surface));
}
.outline-row__actions .chapter-open-link:hover,
.outline-row__actions .chapter-open-link:focus-visible,
.outline-act-open:hover,
.outline-act-open:focus-visible {
  color: var(--brand-teal);
  border-color: color-mix(in srgb, var(--brand-teal) 50%, var(--line));
  background: color-mix(in srgb, var(--brand-teal) 12%, var(--surface));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--brand-teal) 16%, transparent);
}
.icon-btn:active, .icon-btn.is-pressed {
  transform: translateY(1px) scale(.94);
  background: var(--surface-strong);
}
.icon-btn.danger:hover,
.icon-btn.danger:focus-visible {
  color: var(--danger);
  border-color: var(--danger);
  background: var(--danger-soft);
}
.icon-btn.danger:active, .icon-btn.danger.is-pressed {
  background: color-mix(in srgb, var(--danger) 22%, var(--surface));
}
.item-edit-shell .icon-btn,
.quiz-order-item .icon-btn {
  width: 44px;
  min-width: 44px;
  height: 44px;
}

/* Смена иконок: outline → fill на hover / active / pressed */
.ui-ico {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1em;
  height: 1.1em;
  line-height: 1;
  flex: none;
}
.ui-ico .ico-rest,
.ui-ico .ico-hot {
  display: inline-flex;
  transition: opacity .12s, transform .12s;
}
.ui-ico .ico-hot {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(.86);
  pointer-events: none;
}
.has-ico:hover .ui-ico .ico-rest,
.has-ico:focus-visible .ui-ico .ico-rest,
.has-ico:active .ui-ico .ico-rest,
.has-ico.is-pressed .ui-ico .ico-rest {
  opacity: 0;
  transform: scale(.86);
}
.has-ico:hover .ui-ico .ico-hot,
.has-ico:focus-visible .ui-ico .ico-hot,
.has-ico:active .ui-ico .ico-hot,
.has-ico.is-pressed .ui-ico .ico-hot {
  opacity: 1;
  transform: scale(1);
}
.btn .btn-label { line-height: 1.1; }
.crud-tools { display: inline-flex; gap: .25rem; align-items: center; }
.crud-tools form { margin: 0; }

.flash {
  margin: 0 0 1rem;
  padding: .8rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  font-weight: 600;
}
.flash-ok { border-color: rgba(13,122,79,.2); background: var(--ok-soft); color: var(--ok); }
.flash-error { border-color: rgba(197,34,31,.2); background: var(--danger-soft); color: var(--danger); }

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: .12rem .45rem;
  border-radius: var(--radius-chip);
  border: 1px solid var(--line);
  background: var(--surface-muted);
  color: var(--ink-soft);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  box-shadow: none;
  outline: none;
}

.tag .bi {
  font-size: .9em;
  line-height: 1;
  opacity: .95;
}
.tag .bi + .tag-label { margin-left: .28rem; }
.tag.tag-ico {
  min-width: 1.65rem;
  justify-content: center;
  padding-inline: .35rem;
}
.tag.tag-meta {
  max-width: 14rem;
  overflow: hidden;
}
.tag.tag-meta .tag-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}
.tag.tag-meta .mono { font-size: .7rem; }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.35rem;
  padding-inline: .55rem;
}
.btn-icon .bi { font-size: 1rem; line-height: 1; }

.admin-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
}
/* Shared search field: icon left inside wrapper; input text must clear icon */
.search-field,
.admin-search {
  position: relative;
  display: block;
  flex: 1 1 220px;
  margin: 0;
  min-width: 0;
}
.search-field-icon,
.admin-search-ico {
  position: absolute;
  left: .75rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  color: var(--ink-soft);
  pointer-events: none;
  font-size: .95rem;
  opacity: .7;
}
.search-field-input,
.admin-search-input.form-control {
  display: block;
  width: 100%;
  box-sizing: border-box;
  padding-left: 2.5rem !important;
  min-height: 2.4rem;
}
.admin-filter-bar {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: .7rem .9rem;
  margin-bottom: .85rem;
}
.admin-filter-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
}
.admin-filter-group-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  color: var(--ink-soft);
  opacity: .75;
}
.admin-chip {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  min-height: 1.9rem;
  padding: .2rem .6rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .78rem;
  font-weight: 600;
  transition: background .12s ease, border-color .12s ease, color .12s ease, box-shadow .12s ease;
}
.admin-chip .bi { font-size: .92em; opacity: .9; }
.admin-chip:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  color: var(--ink);
  background: var(--accent-soft);
}
.admin-chip.is-active {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  background: var(--accent-soft);
  color: var(--accent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 20%, transparent);
}
.admin-chip-count {
  font-style: normal;
  font-size: .7rem;
  opacity: .75;
  margin-left: .1rem;
}
@media (max-width: 640px) {
  .admin-chip .admin-chip-label {
    /* на узких экранах оставляем короткие подписи; title уже есть */
  }
  .user-admin-tags .tag-meta .tag-label { max-width: 7rem; }
}

.catalog-search-leading {
  position: absolute;
  left: .85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-soft);
  opacity: .65;
  pointer-events: none;
  z-index: 1;
}
.catalog-search-field > input.catalog-search-input.form-control {
  padding-left: .75rem;
}
.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
}
.cat-chip .bi { font-size: .95em; opacity: .85; }
.storage-search {
  display: block;
  width: 100%;
}
.admin-storage .storage-search {
  display: block;
  width: 100%;
}
.tag.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, transparent); background: var(--ok-soft); }
.tag.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); background: var(--warn-soft); }
.tag.bad { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, transparent); background: var(--danger-soft); }
.tag.tag-soft {
  border-width: 1px;
  box-shadow: none;
  font-weight: 600;
}
.tag.hw { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); background: var(--accent-soft); }
.tag.quiz {
  color: #0a7a70;
  border-color: color-mix(in srgb, #0D9488 40%, var(--line));
  background: color-mix(in srgb, #0D9488 14%, var(--surface));
}
.tag.hw .bi, .tag.quiz .bi { margin-right: .25rem; }
.tag.code { color: var(--ok); border-color: var(--ok); background: var(--ok-soft); }
.tag.self-task {
  color: var(--teal, #18B0B8);
  border-color: color-mix(in srgb, var(--teal, #18B0B8) 40%, var(--line));
  background: color-mix(in srgb, var(--teal, #18B0B8) 12%, transparent);
}
.self-task-form{
  display:flex;flex-wrap:wrap;align-items:center;gap:.55rem .75rem;
  margin-top:1rem;padding-top:.85rem;border-top:1px dashed var(--line);
}
.self-task-btn.is-done{cursor:pointer;}
.self-task-who{
  margin-top:1rem;padding:.75rem .9rem;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:var(--surface-muted);
}
.self-task-who-title{margin:0 0 .45rem;font-size:.82rem;font-weight:700;color:var(--ink-soft);}
.self-task-who-list{list-style:none;margin:0;padding:0;display:grid;gap:.3rem;}
.self-task-who-list li{
  display:flex;justify-content:space-between;gap:.75rem;flex-wrap:wrap;
  font-size:.86rem;
}

.auth-wrap {
  min-height: calc(100vh - 40px);
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  background: var(--brand-gradient-auth);
}
.auth-wrap.auth-layout-immersive {
  background: var(--brand-gradient-auth-immersive);
  padding: clamp(1.5rem, 4vw, 3rem) 1rem;
}
.auth-wrap.auth-layout-immersive .auth-card {
  border-color: rgba(255,255,255,.14);
  background: color-mix(in srgb, var(--brand-navy) 18%, rgba(255,255,255,.92));
  box-shadow: 0 28px 64px rgba(0,0,0,.28);
  color: var(--ink);
}
.auth-wrap.auth-layout-immersive .auth-title,
.auth-wrap.auth-layout-immersive .auth-form-title {
  color: var(--brand-navy, var(--ink));
}
.auth-wrap.auth-layout-split {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  place-items: stretch;
  padding: 0;
  min-height: calc(100vh - 40px);
  background: var(--surface);
}
.auth-brand-panel {
  display: grid;
  place-items: center;
  padding: clamp(2rem, 5vw, 3.5rem);
  background: var(--brand-gradient-auth-immersive);
  color: #e8eef6;
  position: relative;
  overflow: hidden;
}
.auth-brand-panel::after {
  content: "";
  position: absolute;
  inset: -20% -10% auto -20%;
  height: 120%;
  background: linear-gradient(125deg,
    transparent 0%,
    color-mix(in srgb, var(--brand-teal) 22%, transparent) 42%,
    color-mix(in srgb, var(--brand-action) 14%, transparent) 68%,
    transparent 92%);
  pointer-events: none;
  opacity: .65;
}
.auth-brand-panel-inner {
  position: relative;
  z-index: 1;
  max-width: 22rem;
  text-align: center;
}
.auth-mark-panel {
  width: 96px;
  height: 96px;
  margin: 0 auto 1.25rem;
  border-radius: 22px;
  box-shadow: 0 16px 40px rgba(0,0,0,.22);
}
.auth-panel-title {
  margin: 0;
  font-size: clamp(1.65rem, 3.5vw, 2.2rem);
  font-weight: 750;
  letter-spacing: -.02em;
  color: #fff;
}
.auth-panel-tagline {
  margin: .65rem 0 0;
  font-size: 1rem;
  color: color-mix(in srgb, #fff 78%, var(--brand-teal));
}
.auth-panel-org {
  margin: .85rem 0 0;
  font-size: .88rem;
  color: color-mix(in srgb, #fff 58%, var(--brand-teal));
}
.auth-main {
  display: grid;
  place-items: center;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background:
    radial-gradient(80% 60% at 100% 0%, color-mix(in srgb, var(--brand-teal) 10%, transparent), transparent 55%),
    var(--brand-bg);
}
.auth-form-title {
  margin: 0 0 .35rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--brand-navy, var(--ink));
}
.auth-wrap .auth-card {
  border: 1px solid color-mix(in srgb, var(--line) 80%, var(--brand-navy));
  background: color-mix(in srgb, var(--surface) 94%, #fff);
  box-shadow: 0 22px 48px rgba(13, 27, 42, .12);
  backdrop-filter: blur(8px);
}
.auth-card {
  width: min(420px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 2.25rem 1.75rem 1.85rem;
}
.auth-title {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 750;
  letter-spacing: -.015em;
  text-transform: none;
  color: var(--brand-navy, var(--ink));
}
.auth-org {
  margin: .75rem 0 0;
  font-size: .82rem;
  color: var(--ink-faint);
  line-height: 1.4;
}
.auth-footer-links {
  display: flex;
  justify-content: center;
  gap: .85rem 1.1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  padding-top: .85rem;
  border-top: 1px solid var(--line);
  font-size: .88rem;
}
.auth-footer-links a { font-weight: 600; }
.auth-head { text-align: center; margin-bottom: 1.5rem; }
.auth-brand-lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .85rem;
  margin-bottom: .35rem;
}
.auth-mark {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: var(--shadow-1);
}
.auth-slogan {
  margin: .15rem 0 0;
  font-size: .88rem;
  font-weight: 500;
  color: var(--ink-soft);
}
.auth-wordmark {
  width: min(280px, 100%);
  height: auto;
  margin: 0 auto 1rem;
}
.auth-head h1 { margin: 0 0 .5rem; font-size: 1.35rem; font-family: var(--font); font-weight: 700; }
.auth-alt { text-align: center; margin-top: 1.1rem; color: var(--ink-soft); font-size: .92rem; }
.auth-alt a { font-weight: 600; }
@media (max-width: 860px) {
  .auth-wrap.auth-layout-split {
    grid-template-columns: 1fr;
  }
  .auth-brand-panel {
    min-height: auto;
    padding: 2rem 1.25rem 1.5rem;
  }
  .auth-mark-panel {
    width: 72px;
    height: 72px;
    margin-bottom: .85rem;
  }
  .auth-panel-title { font-size: 1.45rem; }
}
.status-ico {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  display: grid;
  place-items: center;
  font-family: var(--font);
  font-size: 1.35rem;
  font-weight: 700;
  background: var(--surface-muted);
}
.status-ico.no { color: var(--danger); background: var(--danger-soft); }
.status-ico.wait { color: var(--warn); background: var(--warn-soft); }

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: 1.2rem;
}
.course-access-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
  gap: .45rem .85rem;
  max-height: 220px;
  overflow: auto;
  padding: .35rem 0;
}
.reader-side-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .5rem;
  margin-bottom: .75rem;
}
.reader-side-head .side-back { flex: 1; margin: 0; }
.side-close {
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 1.5rem;
  line-height: 1;
  padding: .15rem .4rem;
  cursor: pointer;
  opacity: .7;
}
.side-close:hover { opacity: 1; }
.course-card {
  display: flex;
  min-height: 200px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  color: var(--ink);
  box-shadow: var(--shadow-1);
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.course-card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
  text-decoration: none;
}
.course-card-cover {
  height: 120px;
  background-image: var(--course-cover-default, url("/static/branding/course-cover-default.png"));
  background-size: cover;
  background-position: center;
  background-color: var(--surface-muted);
  border-bottom: 1px solid var(--line);
}
.course-card.has-cover .spine { display: none; }
.course-card.has-cover .course-body { flex: 1; }
.spine { display: none !important; }
.course-body { padding: 1.15rem 1.2rem; display: flex; flex-direction: column; gap: .65rem; flex: 1; }
.course-body h2 { margin: 0; font-size: 1.1rem; line-height: 1.32; }
.clamp {
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
  color: var(--ink-soft);
  font-size: .94rem;
}
.course-meta { display: flex; gap: .45rem; color: var(--ink-soft); font-size: .85rem; flex-wrap: wrap; align-items: center; }
.course-foot { margin-top: auto; padding-top: .4rem; }

.course-hero {
  display: grid;
  grid-template-columns: minmax(160px, 280px) 1fr;
  gap: 1.25rem;
  align-items: stretch;
  border-radius: var(--radius-lg);
  padding: 0;
  margin-bottom: 1.25rem;
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}
.course-hero-text { padding: 1.35rem 1.4rem; }
@media (max-width: 720px) {
  .course-hero { grid-template-columns: 1fr; }
  .course-hero-text { padding: 1.15rem; }
}
.hero-actions { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; margin-top: 1rem; }
.progress.course-progress {
  height: 8px;
  background: var(--surface-strong);
  border-radius: 999px;
  overflow: hidden;
  max-width: 440px;
  margin-top: .7rem;
  border: none;
}
.progress.course-progress .progress-bar { background: var(--accent); }
.progress-fill { height: 100%; background: var(--accent); }
.moderation-status { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .9rem; }

.module {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: .85rem 1rem;
  margin: .6rem 0;
  position: relative;
}
.module > summary { list-style: none; cursor: pointer; user-select: none; }
.module > summary::-webkit-details-marker { display: none; }
.module .module-head {
  display: grid;
  grid-template-columns: auto 1fr minmax(70px, 130px) auto;
  align-items: center;
  gap: .9rem;
}
.module .module-head--edit {
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  gap: .55rem .75rem;
}
.module-head--edit .module-title-wrap { align-self: center; }
.module-head--edit .outline-rename {
  display: flex;
  min-width: 0;
  width: 100%;
}
.module-head--edit .module-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.module-head-actions {
  justify-self: end;
  flex-wrap: wrap;
  max-width: min(100%, 16rem);
}
@media (max-width: 720px) {
  .module .module-head--edit {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }
  .module-head--edit .module-head-actions {
    grid-column: 1 / -1;
    justify-self: start;
  }
  .module-head--edit .module-chev { grid-column: 3; grid-row: 1; }
}
.module-num {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-weight: 600;
  font-size: .82rem;
  font-variant-numeric: lining-nums;
  letter-spacing: 0;
  background: var(--surface-muted);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.m-progress .module-num { border-color: var(--accent); color: var(--accent); }
.m-done .module-num { background: var(--ok); border-color: var(--ok); color: #fff; }
.module-title-wrap { display: grid; gap: .12rem; min-width: 0; }
.module-title { font-family: var(--font); font-size: 1.02rem; font-weight: 750; letter-spacing: -.01em; }
.module-sub { font-size: .78rem; }
.m-done .module-title { color: var(--ink-soft); }
.module-progress {
  height: 4px;
  border-radius: var(--radius-xs);
  background: var(--surface-muted);
  overflow: hidden;
  border: 1px solid var(--line);
}
.module-progress-fill { display: block; height: 100%; background: var(--accent); }
.m-done .module-progress-fill { background: var(--ok); }
.module-chev { color: var(--ink-faint); transition: transform .18s; font-size: .8rem; }
.module[open] .module-chev { transform: rotate(180deg); }
.module[open] { border-color: var(--accent); }
.module.m-done[open] { border-color: var(--ok); }
.module-body { margin-top: .9rem; border-top: 1px dashed var(--line); padding-top: .7rem; }
.module-tools { justify-content: flex-end; margin-bottom: .4rem; }

.tools { display: flex; gap: .3rem; align-items: center; }
.tools form { margin: 0; }
.chapter-list { list-style: none; margin: .6rem 0 0; padding: 0; }
.chapter-list li { display: flex; align-items: center; gap: .4rem; }
/* Editor rows: grid beats the flex rule above (higher specificity) */
.chapter-list li.outline-row,
.chapter-list li.chapter-row-edit {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr) auto;
  align-items: center;
  gap: .45rem .55rem;
}
.chapter-link {
  flex: 1;
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--ink);
  padding: .72rem .75rem;
  border-radius: var(--radius-md);
}
.chapter-link:hover { background: var(--surface-muted); text-decoration: none; }
.ch-mark {
  flex: none;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  background: var(--surface-muted);
  border: 1px solid var(--line);
  font-family: var(--font);
  font-size: .78rem;
  font-weight: 700;
  font-variant-numeric: lining-nums;
  letter-spacing: 0;
  color: var(--ink-soft);
}
.ch-title { flex: 1; }
.chapter-link.is-done .ch-title { color: var(--ink-soft); }
.is-done .ch-mark { background: var(--ok); border-color: var(--ok); color: #fff; }
.add-row { margin-top: .7rem; }
/* width override lives with .add-inline / flex input rows near outline styles */

.reader {
  display: grid;
  grid-template-columns: minmax(180px, var(--reader-side-w)) minmax(0, 1fr);
  gap: 1.1rem;
  align-items: start;
  width: 100%;
  max-width: none;
}
/* Студия: уже оглавление — основной холст забирает оставшееся место */
.reader:has(.reader-main.is-studio) {
  grid-template-columns: minmax(160px, 220px) minmax(0, 1fr);
  gap: 1rem;
  max-width: none;
  width: 100%;
}
.reader-side {
  position: sticky;
  top: 72px;
  max-height: calc(100vh - 92px);
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: .7rem;
  min-width: 0;
}
.side-back {
  display: block;
  font-weight: 700;
  margin-bottom: .8rem;
  font-size: .88rem;
  line-height: 1.35;
  word-break: break-word;
}
.side-module {
  font-size: .75rem;
  margin: .8rem 0 .25rem;
  color: var(--ink-faint);
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0;
}
.side-topic {
  font-size: .72rem;
  margin: .45rem 0 .15rem .15rem;
  color: var(--ink-muted, var(--ink-faint));
  font-weight: 600;
}
.side-tree ul { list-style: none; margin: 0; padding: 0; }
.side-tree li { margin: 0; }
.side-tree a {
  display: flex;
  align-items: flex-start;
  gap: .45rem;
  padding: .5rem .65rem;
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: .9rem;
  line-height: 1.35;
  text-decoration: none;
}
.side-tree a i {
  flex: none;
  margin-top: .12rem;
  font-size: .95rem;
  color: var(--ok);
}
.side-tree a:hover { background: var(--surface-muted); text-decoration: none; }
.side-tree a.is-current { background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.side-tree a.is-done { color: var(--ink-soft); }
.side-tree a.is-current.is-done { color: var(--accent); }
.reader-side-backdrop {
  display: none;
}
.side-open { display: none; margin-bottom: 1rem; }

.reader-main { min-width: 0; }
.chapter-title-row { display: flex; align-items: center; gap: .6rem; }
.item {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  margin: .75rem 0;
}
.item-homework { border-left: 4px solid var(--accent); }
.item-quiz { border-left: 4px solid #0D9488; }
.item-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: .4rem;
  margin: 0 0 1rem;
  padding: 0;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}
.item-head .tag {
  flex: none;
  margin: 0;
}
.item-head h2 {
  margin: 0 !important;
  padding: 0;
  width: auto;
  max-width: 100%;
  flex: none;
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.25;
  color: var(--ink);
  text-align: left;
}
.item-head.hw-head {
  gap: .45rem;
}
.item-tools { position: absolute; top: .8rem; right: .8rem; opacity: .18; transition: opacity .15s ease; }
.item:hover .item-tools { opacity: 1; }

.prose { max-width: 78ch; overflow-wrap: break-word; color: var(--ink); font-family: var(--font); }
.prose > :first-child { margin-top: 0; }
.prose > :last-child { margin-bottom: 0; }
.prose h2, .prose h3 { margin-top: 1.7em; margin-bottom: .5em; }
/* Вставка из Word/браузера часто несёт font-family — принудительно шрифт платформы */
.prose :where(:not(code):not(pre):not(kbd):not(samp)),
.rich-surface :where(:not(code):not(pre):not(kbd):not(samp)),
.page-canvas-view :where(:not(code):not(pre):not(kbd):not(samp)) {
  font-family: inherit !important;
}
.prose code, .prose kbd, .prose samp,
.rich-surface code, .page-canvas-view code {
  font-family: ui-monospace, Consolas, "Courier New", monospace !important;
}
.prose pre, .rich-surface pre, .page-canvas-view pre {
  font-family: ui-monospace, Consolas, "Courier New", monospace !important;
}
.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}
.prose a:hover { text-decoration-thickness: 2px; }
.prose img { border-radius: var(--radius-md); }
.prose blockquote {
  margin: 1rem 0;
  padding: .85rem 1.05rem;
  border-left: 4px solid var(--callout-line);
  background: var(--callout-bg);
  border-radius: 0 12px 12px 0;
  color: var(--ink);
}
.prose table {
  width: 100%;
  margin: 1.2rem 0;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.prose th, .prose td { padding: .65rem .8rem; border-bottom: 1px solid var(--line); text-align: left; background: var(--surface); }
.prose th { background: var(--surface-muted); font-weight: 700; }
.prose tr:last-child td { border-bottom: 0; }
.prose code {
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: .12em .36em;
  font-size: .86em;
}
.prose pre {
  background: #17212b;
  color: #e8eef4;
  border-radius: var(--radius-md);
  padding: 1rem 1.2rem;
  overflow: auto;
  font-size: .84rem;
  line-height: 1.6;
  border: 1px solid rgba(255,255,255,.06);
}
[data-theme="dark"] .prose pre { background: #0d1318; }
.prose pre code { background: none; border: none; padding: 0; color: inherit; }
.prose ul, .prose ol { padding-left: 1.35rem; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 1.4rem 0; }

.video-frame { width: 100%; aspect-ratio: 16/9; border: none; border-radius: var(--radius-md); background: #000; }
.embed-wrap { position: relative; width: 100%; padding-top: 56.25%; border-radius: var(--radius-md); overflow: hidden; background: #000; }
.embed-wrap iframe, .embed-wrap video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.hosted-video video,
.page-video video {
  display: block;
  background: #0b0f14;
  outline: none;
}
.page-video {
  margin: .85rem 0 1.1rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-muted) 70%, #000);
}
.page-video .video-frame {
  width: 100%;
  height: auto;
  max-height: min(70vh, 720px);
  aspect-ratio: 16/9;
  background: #000;
}
[data-theme="dark"] .page-video,
[data-theme="dark"] .hosted-video {
  border-color: color-mix(in srgb, var(--line) 80%, #fff);
}
html.a11y-high-contrast .page-video,
html.a11y-high-contrast .hosted-video,
html.a11y-high-contrast .video-progress-bar {
  border: 2px solid currentColor;
}
html.a11y-high-contrast .video-progress-fill {
  background: currentColor;
}
html.a11y-high-contrast .video-trust-badge {
  color: inherit;
  font-weight: 700;
}

.hw-form { margin-top: 1rem; border-top: 1px dashed var(--line); padding-top: 1rem; }
.hw-form-title{
  margin:0;font-size:.95rem;font-weight:800;color:var(--ink);
}
.hw-mode-hint{margin:.35rem 0 .75rem;}
.hw-attempt{
  margin-top:.9rem;display:grid;gap:.75rem;
}
.hw-attempt-meta{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:.35rem .75rem;
}
.hw-attempt-label{
  display:block;font-size:.72rem;font-weight:800;letter-spacing:.04em;
  text-transform:uppercase;color:var(--ink-faint);margin-bottom:.25rem;
}
.hw-attempt-block{min-width:0;}
.hw-attempt-text{
  margin:0;padding:.65rem .8rem;border-radius:var(--radius-sm);
  background:color-mix(in srgb, var(--surface) 80%, transparent);
  border:1px solid color-mix(in srgb, var(--line) 80%, transparent);
}
.hw-review-block{
  margin:.75rem 0;padding-top:.15rem;
}
.hw-file-field{
  display:grid;gap:.4rem;padding:.85rem 1rem;border-radius:var(--radius-sm);
  border:1px solid color-mix(in srgb, var(--accent) 18%, var(--line));
  background:var(--callout-bg);
}
.hw-file-field .file-label{margin:0;display:grid;gap:.4rem;font-weight:600;}
.hw-file-field input[type="file"]{background:var(--surface);}
.hw-file-hint{margin:0;font-size:.84rem;line-height:1.35;}
.hw-file-panel{
  display:grid;gap:.85rem;
}
.hw-file-panel[hidden]{display:none !important;}
.hw-file-settings{
  margin:0;padding:1rem 1.05rem;border:1px solid var(--line);border-radius:var(--radius-md);
  background:var(--surface);
}
.hw-file-settings legend{
  float:none;width:auto;padding:0 .35rem;margin-bottom:.35rem;
  font-size:.92rem;font-weight:700;color:var(--ink);
}
.hw-ext-groups{display:grid;gap:.75rem;}
.hw-ext-group-title{
  display:block;font-size:.78rem;font-weight:700;letter-spacing:.04em;
  text-transform:uppercase;color:var(--ink-faint);margin-bottom:.35rem;
}
.hw-ext-checks{display:flex;flex-wrap:wrap;gap:.35rem .85rem;}
.sub-status {
  margin-top: .8rem;
  padding: .7rem .95rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  font-weight: 600;
}
.sub-sent { color: var(--warn); border-color: rgba(154,103,0,.2); background: var(--warn-soft); }
.sub-accepted { color: var(--ok); border-color: rgba(13,122,79,.2); background: var(--ok-soft); }
.sub-rejected { color: var(--danger); border-color: rgba(197,34,31,.2); background: var(--danger-soft); }
.chapter-nav { display: flex; justify-content: space-between; align-items: center; gap: .6rem; margin: 1.6rem 0; flex-wrap: wrap; }

.file-download { display: flex; align-items: center; gap: 1rem; margin: .6rem 0; }
.accordion-item { border: 1px solid var(--line); border-radius: var(--radius-md); margin: .5rem 0; }
.accordion-item[open] { border-color: var(--accent); }
.accordion-summary { padding: .8rem 1rem; cursor: pointer; user-select: none; list-style: none; display: flex; align-items: center; gap: .45rem; }
.accordion-summary::-webkit-details-marker { display: none; }
.accordion-summary h2 { margin: 0; display: inline; font-size: 1rem; }
.accordion-summary .acc-chev { color: var(--accent); transition: transform .15s; }
.accordion-item[open] .accordion-summary .acc-chev { transform: rotate(90deg); }
.accordion-body { padding: 0 1rem 1rem; }

.tabs { display: flex; gap: 0; flex-wrap: wrap; border-bottom: 2px solid var(--line); }
.tab {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  min-height: 44px;
  padding: .5rem 1.1rem;
  border-radius: 0;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: .94rem;
  background: transparent;
}
.tab:hover { color: var(--ink); background: transparent; text-decoration: none; }
.tab.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: transparent;
  font-weight: 700;
}
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th {
  text-align: left;
  color: var(--ink-faint);
  font-weight: 600;
  font-size: .8rem;
  text-transform: none;
  letter-spacing: 0;
}
.table th, .table td { padding: .8rem .7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.table tr:hover td { background: var(--surface-muted); }
.table-scroll {
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
}
.prose .table-scroll,
.rich-surface .table-scroll,
.page-canvas-view .table-scroll {
  margin: 1.2rem 0;
}
.prose .table-scroll > table,
.rich-surface .table-scroll > table,
.page-canvas-view .table-scroll > table,
.table-scroll > .page-table {
  margin-top: 0;
  margin-bottom: 0;
  width: max-content;
  min-width: 100%;
}
.logs .log-warn td { color: var(--warn); }
.logs .log-error td { color: var(--danger); }
.sub-card .sub-head { display: flex; justify-content: space-between; gap: 1rem; align-items: start; flex-wrap: wrap; }
.sub-text { background: var(--surface-muted); border-radius: var(--radius-md); padding: .75rem 1rem; margin: .6rem 0; }

.inline-form { display: inline; }

.about-course { max-width: 760px; margin-top: 1.5rem; }
.about-course h2 { margin-bottom: .6rem; }
.about-facts { list-style: none; padding: 0; margin: 1rem 0; display: grid; gap: .45rem; }
.about-facts li { color: var(--ink); }
.about-facts strong { color: var(--accent); font-size: 1.05em; }
.about-lock {
  margin-top: 1rem;
  padding: .85rem 1rem;
  background: var(--surface-muted);
  border-radius: var(--radius-md);
  color: var(--ink-soft);
  font-size: .92rem;
}

.avatar {
  border-radius: 50%;
  object-fit: cover;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.avatar-mini { width: 26px; height: 26px; font-size: .8rem; }
.avatar-big { width: 96px; height: 96px; font-size: 2.2rem; }
.avatar-letter {
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font);
  font-weight: 700;
}
.profile-card { max-width: 620px; display: grid; gap: 1.2rem; }
.profile-ava-block { display: flex; justify-content: center; }
.profile-meta p { margin: .2rem 0; font-size: .92rem; }

.buy-confirm { max-width: 520px; margin-top: 1rem; border: 2px solid var(--accent); }
.buy-confirm h2 { margin-bottom: .5rem; }
.buy-confirm-actions{
  display:flex;flex-wrap:wrap;align-items:center;gap:.65rem;margin-top:1rem;
}
.buy-confirm-actions form{margin:0;display:contents;}
.buy-confirm-actions .btn{
  flex:1 1 auto;min-width:9.5rem;min-height:44px;width:auto;
}

.restart-box { max-width: 560px; margin: 3rem auto; text-align: center; }
.restart-fill { width: 100%; animation: restartPulse 1.4s ease-in-out infinite; }
@keyframes restartPulse { 0%,100% { opacity: .35 } 50% { opacity: 1 } }

.quiz-q { border: 1px solid var(--line); border-radius: var(--radius-md); padding: .8rem 1rem; margin: 0; }
.quiz-q legend { padding: 0 .4rem; }
.quiz-opt {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  justify-content: flex-start;
  gap: .65rem;
  padding: .55rem .6rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: left;
  font-weight: 500;
  width: 100%;
  box-sizing: border-box;
}
.quiz-opt:hover { background: var(--surface-muted); border-color: var(--line); }
.quiz-opt input[type="radio"] {
  flex: 0 0 auto;
  margin: .2rem 0 0;
}
.code-editor {
  min-height: 220px;
  background: #17212b;
  color: #ebf2f7;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  padding: .95rem;
  tab-size: 4;
}
.code-errors {
  background: var(--danger-soft);
  border: 1px solid rgba(197,34,31,.24);
  border-radius: var(--radius-md);
  padding: .7rem 1rem;
  font-size: .9rem;
}
.code-errors ul { margin: .4rem 0 0 1.1rem; }
.code-errors .pre-wrap { white-space: pre-wrap; word-break: break-word; }
.code-output {
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: .7rem 1rem;
  font-size: .9rem;
}
.code-output-pre, .code-output pre {
  margin: .4rem 0 0;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 14rem;
  overflow: auto;
}
.code-lang { margin: -.35rem 0 .75rem; }
.code-howto { margin: -.2rem 0 .85rem; line-height: 1.4; }
.code-runtime-warn {
  margin: 0 0 .85rem;
  padding: .65rem .85rem;
  border-radius: var(--radius-md);
  background: var(--danger-soft);
  border: 1px solid rgba(197,34,31,.24);
  font-size: .9rem;
}
.code-solved { background: var(--surface-muted); border-radius: var(--radius-md); padding: .8rem; overflow-x: auto; }
.qb-q { display: grid; gap: .5rem; }
/* Override global label{flex-direction:column} + input{width:100%} */
.qb-opt-row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: .4rem;
  align-items: center;
  width: 100%;
  min-width: 0;
  font-weight: 400;
  color: inherit;
  cursor: default;
}
.qb-opt-row .qb-correct {
  flex: 0 0 auto;
  align-self: center;
}
.qb-opt-row .qb-opt {
  flex: 1 1 auto;
  min-width: 0;
  width: auto;
  max-width: none;
}
.qb-opt-row .qb-delopt,
.qb-opt-row .icon-btn {
  flex: 0 0 auto;
}
.ed-toolbar { display: flex; flex-wrap: wrap; gap: .3rem; margin: .3rem 0; }
.ed-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--radius-xs);
  min-height: 34px;
  padding: .35rem .65rem;
  cursor: pointer;
  font-size: .84rem;
  font-weight: 600;
}
.ed-btn:hover { border-color: var(--accent); }
.ed-color, .ed-font {
  width: auto;
  min-height: 34px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--radius-xs);
  padding: .25rem .7rem;
  font-size: .84rem;
}
.bell { position: relative; }
.notif-page { max-width: 46rem; }
.notif-page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.notif-page-title-wrap { min-width: 0; }
.notif-page-title {
  display: flex;
  align-items: center;
  gap: .65rem;
  flex-wrap: wrap;
  margin: 0;
}
.notif-page-lead {
  margin: .35rem 0 0;
  color: var(--ink-soft);
  font-size: .95rem;
  max-width: 36rem;
}
.notif-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6rem;
  height: 1.6rem;
  padding: 0 .45rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 700;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
}
.notif-page-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
}
.notif-page-tools form { margin: 0; }
.notif-empty {
  text-align: center;
  padding: 2.75rem 1.25rem;
}
.notif-empty-ico {
  width: 3.25rem;
  height: 3.25rem;
  margin: 0 auto .9rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 1.45rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
}
.notif-empty h2 {
  margin: 0 0 .4rem;
  font-size: 1.25rem;
}
.notif-list { gap: .7rem; }
.notif {
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.notif-new {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--line));
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--accent) 9%, var(--surface)) 0,
    var(--surface) 4.5rem
  );
  box-shadow: inset 4px 0 0 var(--accent);
}
.notif-read { opacity: .92; }
.notif-row {
  display: flex;
  gap: .85rem;
  align-items: flex-start;
  padding: 1rem 1.05rem;
}
.notif-kind {
  flex: none;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, var(--line));
}
.notif-kind[data-kind="enroll"] {
  color: var(--brand-teal, #18B0B8);
  background: var(--teal-soft);
  border-color: color-mix(in srgb, var(--brand-teal, #18B0B8) 28%, var(--line));
}
.notif-kind[data-kind="homework"],
.notif-kind[data-kind="practice"] {
  color: var(--warn);
  background: var(--warn-soft);
  border-color: color-mix(in srgb, var(--warn) 30%, var(--line));
}
.notif-kind[data-kind="grades"] {
  color: var(--ok);
  background: var(--ok-soft);
  border-color: color-mix(in srgb, var(--ok) 30%, var(--line));
}
.notif-kind[data-kind="moderation"] {
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent-strong) 12%, var(--surface));
}
.notif-kind[data-kind="quiz"] {
  color: #6b4bb5;
  background: color-mix(in srgb, #6b4bb5 12%, var(--surface));
  border-color: color-mix(in srgb, #6b4bb5 28%, var(--line));
}
.notif-kind[data-kind="help"] {
  color: var(--bs-primary, #1d5fbf);
  background: color-mix(in srgb, var(--bs-primary, #1d5fbf) 12%, var(--surface));
}
.notif-body { flex: 1; min-width: 0; }
.notif-text {
  margin: 0;
  font-weight: 650;
  line-height: 1.45;
  color: var(--ink);
  font-size: .98rem;
}
.notif-read .notif-text { font-weight: 500; color: var(--ink-soft); }
.notif-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .85rem;
  margin-top: .55rem;
}
.notif-ts {
  font-size: .82rem;
  white-space: nowrap;
  color: var(--ink-soft);
}
.notif-state {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--accent);
}
.notif-read .notif-state { color: var(--ink-soft); font-weight: 600; }
.notif-open { margin: 0; }
.notif-actions {
  flex: none;
  align-self: flex-start;
  display: flex;
  gap: .35rem;
}
.notif-actions form { margin: 0; }
@media (max-width: 640px) {
  .notif-row { flex-wrap: wrap; }
  .notif-actions { margin-left: auto; }
}

.user-menu { position: relative; display: inline-flex; align-items: center; }
.gear {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  min-height: 40px;
  padding: .2rem .55rem .2rem .2rem;
  cursor: pointer;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: .85rem;
}
.gear:hover { border-color: var(--accent); }
.gear-chevron { font-size: .6rem; color: var(--ink-faint); transition: transform .2s; }
.user-menu.open .gear-chevron { transform: rotate(180deg); }
.user-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 220px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  padding: .35rem 0;
  display: none;
  z-index: 60;
}
.user-menu.open .user-dropdown { display: block; }
.user-dropdown-head { padding: .6rem .95rem .45rem; border-bottom: 1px solid var(--line); margin-bottom: .3rem; }
.user-dropdown-head b { display: block; font-size: .94rem; }
.user-dropdown-head .muted { font-size: .78rem; }
.user-dropdown-item {
  display: block;
  padding: .5rem .95rem;
  color: var(--ink);
  font-weight: 600;
  font-size: .9rem;
}
.user-dropdown-item:hover { background: var(--surface-muted); text-decoration: none; }
.user-dropdown-item.danger { color: var(--danger); }
.user-dropdown-item.danger:hover { background: var(--danger-soft); }

.setting-group { display: flex; flex-direction: column; gap: .5rem; }
.setting-group-title {
  font-size: .9rem;
  font-weight: 650;
  color: var(--ink);
  margin: 0 0 .15rem;
  text-transform: none;
  letter-spacing: 0;
}
.seg {
  display: flex;
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 3px;
}
.seg-item { flex: 1; position: relative; }
.seg-item input { position: absolute; opacity: 0; pointer-events: none; }
.seg-item > span,
.seg-item-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: .5rem .75rem;
  border-radius: calc(var(--radius-sm) - 2px);
  cursor: pointer;
  font-size: .88rem;
  font-weight: 600;
  color: var(--ink-soft);
  white-space: nowrap;
  text-align: center;
}
.seg-item > span:hover,
.seg-item-main:hover { color: var(--ink); }
.seg-item input:checked + span,
.seg-item input:checked + .seg-item-main { background: var(--surface); color: var(--accent); }

.seg-density {
  flex-direction: column;
  gap: .4rem;
  padding: .45rem;
}
.seg-item-dense { flex: none; width: 100%; }
.seg-item-dense .seg-item-main {
  flex-direction: column;
  align-items: flex-start;
  gap: .2rem;
  white-space: normal;
  text-align: left;
  min-height: 0;
  padding: .65rem .8rem;
}
.seg-item-label { font-weight: 650; font-size: .95rem; color: inherit; }
.seg-item-hint {
  display: block;
  font-size: .78rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink-faint);
  max-width: 52ch;
}
.seg-item input:checked + .seg-item-main .seg-item-hint { color: var(--ink-soft); }

/* Предпросмотр режима интерфейса */
.density-preview {
  margin-top: .75rem;
  padding: .85rem 1rem;
  border: 1px dashed color-mix(in srgb, var(--accent) 28%, var(--line));
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface-muted) 45%, var(--surface));
}
.density-preview-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: .5rem .75rem;
  margin-bottom: .65rem;
}
.density-preview-title {
  font-size: .82rem;
  font-weight: 700;
  color: var(--ink);
}
.density-preview-open { flex: none; }
.density-preview-stage {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem .65rem;
}
.density-preview-btn {
  pointer-events: none;
  cursor: default;
  user-select: none;
  position: relative;
}
.density-preview-detail {
  display: none;
  flex: 1 1 100%;
  align-items: flex-start;
  gap: .4rem;
  margin: 0;
  padding: .55rem .7rem;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent-soft) 40%, var(--surface));
  border-left: 3px solid var(--accent);
  font-size: .8rem;
  line-height: 1.4;
  color: var(--ink-soft);
}
.density-preview-detail-ico {
  color: var(--accent);
  flex: none;
  margin-top: .05rem;
}
.density-preview-hint {
  margin-top: .65rem;
  line-height: 1.4;
  max-width: 48rem;
}
.density-preview[data-density-preview="simple"] .density-preview-stage { gap: .75rem .9rem; }
.density-preview[data-density-preview="simple"] .density-preview-btn.has-ico {
  min-height: 48px;
  padding: .55rem 1.15rem;
  gap: .5rem;
  font-weight: 650;
  font-size: 1.02rem;
}
.density-preview[data-density-preview="simple"] .density-preview-btn.btn-sm.has-ico {
  min-height: 44px;
  font-size: .95rem;
}
.density-preview[data-density-preview="simple"] .density-preview-btn .btn-label {
  display: inline !important;
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  clip: auto;
  overflow: visible;
}
.density-preview[data-density-preview="simple"] .density-preview-detail {
  display: flex;
}
.density-preview[data-density-preview="standard"] .density-preview-stage { gap: .55rem .7rem; }
.density-preview[data-density-preview="standard"] .density-preview-btn.btn-sm.has-ico .btn-label {
  display: inline;
  position: static;
  width: auto;
  clip: auto;
  overflow: visible;
}
.density-preview[data-density-preview="compact"] .density-preview-stage { gap: .35rem .45rem; }
.density-preview[data-density-preview="compact"] .density-preview-btn.btn-sm.has-ico .btn-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.density-preview[data-density-preview="compact"] .density-preview-btn.btn-sm.has-ico {
  padding-inline: .5rem;
  min-width: 2.25rem;
  min-height: 2.25rem;
  justify-content: center;
}
.density-preview[data-density-preview="compact"] .density-preview-btn.btn-primary.has-ico {
  min-height: 2.35rem;
  padding-inline: .85rem;
  font-size: .9rem;
}
.density-preview[data-density-preview="compact"] .density-preview-btn.btn-primary.has-ico .btn-label {
  display: inline;
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  clip: auto;
  overflow: visible;
}

/* Модальное сравнение режимов */
.density-compare-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 1rem;
}
.density-compare-tab {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: .4rem .9rem;
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
}
.density-compare-tab.is-active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
  color: var(--accent-strong, var(--accent));
}
.density-compare-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
@media (max-width: 991px) {
  .density-compare-grid { grid-template-columns: 1fr; }
  .density-compare-card { display: none; }
  .density-compare-card.is-active { display: block; }
}
@media (min-width: 992px) {
  .density-compare-tabs { display: none; }
  .density-compare-card { display: block !important; }
}
.density-compare-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .85rem;
  background: var(--surface);
}
.density-compare-card.is-active {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
}
.density-compare-card-title {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 .25rem;
}
.density-compare-card-blurb { margin-bottom: .65rem !important; }
.density-mock {
  border: 1px dashed color-mix(in srgb, var(--line) 80%, var(--accent));
  border-radius: var(--radius-sm);
  padding: .75rem;
  background: color-mix(in srgb, var(--surface-muted) 50%, var(--surface));
  min-height: 9.5rem;
}
.density-mock-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem .55rem;
}
.density-mock-btn {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  padding: .35rem .7rem;
  font-size: .86rem;
  font-weight: 600;
  line-height: 1.2;
  position: relative;
  pointer-events: none;
  user-select: none;
}
.density-mock-btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.density-mock-btn .ui-ico { display: inline-flex; }
.density-mock-hint {
  display: flex;
  gap: .45rem;
  align-items: flex-start;
  margin: .65rem 0 0;
  font-size: .78rem;
  line-height: 1.4;
  color: var(--ink-soft);
}
.density-mock-hint > .bi { color: var(--accent); flex: none; margin-top: .1rem; }
.density-mock-hint-muted { opacity: .85; }
.density-mock-coach {
  margin-top: .55rem;
  padding: .55rem .65rem;
  border-left: 3px solid var(--teal, #0d9488);
  background: color-mix(in srgb, var(--teal, #0d9488) 8%, var(--surface));
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: .78rem;
  line-height: 1.4;
  color: var(--ink-soft);
}
.density-mock-coach strong { display: block; color: var(--ink); margin-bottom: .25rem; font-size: .82rem; }
.density-mock-coach ul { padding-left: 1.1rem; margin: 0; }
.density-mock-coach li { margin-bottom: .2rem; }

/* Понятный — в мокапе крупнее */
.density-mock--simple .density-mock-toolbar { gap: .55rem .7rem; }
.density-mock--simple .density-mock-btn {
  min-height: 44px;
  padding: .5rem 1rem;
  font-size: .95rem;
  font-weight: 650;
}
.density-mock--simple .density-mock-btn .btn-label { display: inline !important; }

/* Стандарт — подписи видны, обычный размер */
.density-mock--standard .density-mock-btn-sm {
  min-height: 2.15rem;
  padding: .3rem .65rem;
  font-size: .82rem;
}
.density-mock--standard .density-mock-btn .btn-label { display: inline; }

/* Компактный — мелкие только иконки */
.density-mock--compact .density-mock-toolbar { gap: .3rem .4rem; }
.density-mock--compact .density-mock-btn-primary {
  min-height: 2.2rem;
  padding: .3rem .75rem;
  font-size: .84rem;
}
.density-mock--compact .density-mock-btn-sm {
  min-width: 2.15rem;
  min-height: 2.15rem;
  padding: .3rem .45rem;
  justify-content: center;
}
.density-mock--compact .density-mock-btn-sm .btn-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 0;
  border-bottom: 1px solid var(--line);
}
.toggle-row:last-child { border-bottom: none; }
.toggle-row > span:first-child { display: flex; flex-direction: column; gap: .1rem; }
.toggle-row b { font-size: .95rem; font-weight: 700; color: var(--ink); }
.toggle-row small { font-size: .82rem; color: var(--ink-soft); }
.toggle { position: relative; display: inline-block; width: 46px; height: 28px; flex: none; }
.toggle input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; z-index: 2; }
.toggle-slider { position: absolute; inset: 0; background: var(--line); border-radius: 999px; transition: background .2s; }
.toggle-slider::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 3px;
  width: 22px;
  height: 22px;
  background: #fff;
  border-radius: 50%;
  transition: transform .2s;
}
.toggle input:checked + .toggle-slider { background: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(18px); }

.settings-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  max-width: 920px;
  align-items: stretch;
}
.settings-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 640px;
}
.settings-head { max-width: 640px; }
.settings-fields { display: flex; flex-direction: column; gap: .15rem; }
.settings-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1rem;
  margin-bottom: .55rem;
}
.settings-sync {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: .9rem;
  font-weight: 600;
}
.settings-sync .bi { color: var(--ok); font-size: 1.05rem; }
.settings-sync.is-pending { color: var(--ink-faint); }
.settings-sync.is-pending .bi { color: var(--ink-faint); animation: settingsPulse 1s ease-in-out infinite; }
.settings-sync.is-error { color: var(--danger); }
.settings-sync.is-error .bi { color: var(--danger); }
@keyframes settingsPulse { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }
.settings-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}
.settings-card .toggle-row:last-child { border-bottom: none; }
.settings-actions {
  grid-column: 1 / -1;
}
.settings-page { max-width: 720px; }
.settings-links { margin-top: .25rem; max-width: 640px; }
.settings-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .75rem;
}
.settings-link-card {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-muted);
  color: var(--ink);
  text-decoration: none;
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.settings-link-card:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  background: var(--surface);
  box-shadow: var(--shadow-1);
  text-decoration: none;
  color: var(--ink);
}
.settings-link-card i {
  font-size: 1.25rem;
  color: var(--accent);
  margin-top: .1rem;
}
.settings-link-card span { display: flex; flex-direction: column; gap: .15rem; }
.settings-link-card small { color: var(--ink-soft); font-weight: 500; line-height: 1.35; }
@media (max-width: 768px) {
  .settings-layout { grid-template-columns: 1fr; }
}
.settings-card .section-title {
  display: flex;
  align-items: center;
  gap: .45rem;
  margin-bottom: .85rem;
}
.settings-card .setting-group { margin-bottom: .85rem; }

.logo-preview { display: flex; align-items: center; gap: .8rem; margin-bottom: .5rem; }
.logo-preview img { height: 48px; width: auto; border-radius: var(--radius-sm); border: 1px solid var(--line); }

/* ---------- Brand studio (admin branding) ---------- */
.brand-studio {
  --brand-studio-radius: 18px;
  --brand-studio-pad: 1.25rem 1.35rem;
  display: grid;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}
/* Live preview: palette tokens scoped to .brand-studio (never documentElement) */
.brand-studio .btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.brand-studio .btn-primary:hover,
.brand-studio .btn-primary:focus-visible {
  background-color: var(--accent-hover) !important;
  border-color: var(--accent-hover) !important;
  color: var(--accent-ink) !important;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 34%, transparent);
}
.brand-studio .btn-primary:active,
.brand-studio .btn-primary.is-pressed {
  background-color: var(--accent-strong) !important;
  border-color: var(--accent-strong) !important;
  color: var(--accent-ink) !important;
  filter: none;
}
.brand-studio .btn-outline-secondary:hover,
.brand-studio .btn-outline:hover {
  background: var(--accent-soft) !important;
  border-color: color-mix(in srgb, var(--accent) 38%, var(--line)) !important;
  color: var(--accent-strong) !important;
}
.brand-studio .brand-layout-card:hover {
  border-color: color-mix(in srgb, var(--accent) 28%, var(--line));
}
.brand-studio-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  padding-bottom: .25rem;
}
.brand-studio-kicker {
  margin: 0 0 .2rem;
  font-size: .72rem;
  font-weight: 650;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.brand-studio-title {
  margin: 0;
  font-size: clamp(1.45rem, 2.2vw, 1.85rem);
  font-weight: 750;
  letter-spacing: -.02em;
  color: var(--ink);
  line-height: 1.15;
}
.brand-studio-lead {
  margin: .45rem 0 0;
  max-width: 40rem;
  font-size: .92rem;
  line-height: 1.5;
  color: var(--ink-soft);
}
.brand-studio-toc {
  display: inline-flex;
  flex-wrap: wrap;
  gap: .35rem;
  padding: .28rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-muted) 70%, var(--surface));
  border: 1px solid var(--line);
}
.brand-studio-toc a {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0 .9rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-soft);
  text-decoration: none;
  transition: background .15s ease, color .15s ease;
}
.brand-studio-toc a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.brand-studio-toc a:hover,
.brand-studio-toc a:focus-visible {
  color: var(--accent-strong);
  background: var(--accent-soft);
}
.brand-studio-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: 1.15rem;
  align-items: start;
}
.brand-studio-main { display: grid; gap: 1rem; min-width: 0; }
.brand-studio-form { display: grid; gap: 1rem; }
.brand-panel {
  padding: var(--brand-studio-pad);
  border: 1px solid var(--line);
  border-radius: var(--brand-studio-radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, #fff) 0%, var(--surface) 100%);
  box-shadow: 0 1px 0 color-mix(in srgb, #fff 55%, transparent) inset;
}
.brand-panel-head { margin-bottom: 1rem; }
.brand-panel-head-loose { margin-bottom: .85rem; }
.brand-panel-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -.015em;
  color: var(--ink);
}
.brand-panel-hint {
  margin: .3rem 0 0;
  font-size: .86rem;
  line-height: 1.45;
  color: var(--ink-soft);
  max-width: 42rem;
}
.brand-fields {
  display: grid;
  gap: .85rem;
}
.brand-fields-2 { grid-template-columns: 1fr 1fr; }
.brand-field { display: grid; gap: .35rem; min-width: 0; }
.brand-field-span { grid-column: 1 / -1; }
.brand-field-label {
  font-size: .78rem;
  font-weight: 650;
  letter-spacing: .02em;
  color: var(--ink-soft);
}
.brand-field .form-control,
.brand-field .form-select {
  border-radius: 12px;
  min-height: 2.65rem;
}
.brand-note {
  margin: 1rem 0 0;
  padding: .7rem .85rem;
  border-radius: 12px;
  background: color-mix(in srgb, var(--surface-muted) 65%, transparent);
  font-size: .82rem;
  line-height: 1.45;
  color: var(--ink-soft);
}
.brand-subhead {
  margin: 1rem 0 .55rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.brand-preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 138px), 1fr));
  gap: .55rem;
  margin-bottom: 1rem;
}
.brand-preset-card {
  display: grid;
  gap: .35rem;
  padding: .7rem .7rem .75rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  text-align: left;
  cursor: pointer;
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.brand-preset-card:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  transform: translateY(-1px);
}
.brand-preset-card.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 16%, transparent);
}
.brand-preset-swatch {
  display: flex;
  gap: 3px;
  min-height: 26px;
  border-radius: 8px;
  overflow: hidden;
}
.brand-preset-swatch i {
  flex: 1;
  display: block;
  min-height: 26px;
}
.brand-preset-swatch .brand-preset-custom {
  flex: 1;
  border-radius: 8px;
}
.brand-preset-label {
  font-size: .84rem;
  font-weight: 700;
  color: var(--ink);
}
.brand-preset-hint {
  font-size: .72rem;
  line-height: 1.35;
  color: var(--ink-soft);
}
.brand-color-rows {
  display: grid;
  gap: .45rem;
  margin-bottom: 1rem;
}
.brand-color-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .55rem .7rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--surface-muted) 35%, var(--surface));
}
.brand-color-meta { display: grid; gap: .1rem; min-width: 0; }
.brand-color-title { font-size: .88rem; font-weight: 650; color: var(--ink); }
.brand-color-hint { font-size: .75rem; color: var(--ink-soft); }
.brand-color-controls {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  flex: none;
}
.brand-color-swatch {
  box-shadow: inset 0 0 0 1px color-mix(in srgb, #fff 35%, transparent);
}
.brand-color-hex {
  width: 6.4rem;
  min-height: 2.5rem !important;
  padding: .35rem .55rem;
  border-radius: 999px !important;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .8rem;
  text-transform: lowercase;
}
.brand-field-theme { max-width: 22rem; }
.brand-layout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 168px), 1fr));
  gap: .55rem;
  margin-bottom: .35rem;
}
.brand-layout-card {
  position: relative;
  display: grid;
  gap: .4rem;
  padding: .7rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  cursor: pointer;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.brand-layout-card:has(input:checked) {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 14%, transparent);
}
.brand-layout-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 1px;
  height: 1px;
}
.brand-layout-thumb {
  display: block;
  height: 56px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface-muted);
}
.brand-layout-thumb-auth-centered {
  background:
    radial-gradient(70% 60% at 20% 20%, color-mix(in srgb, var(--brand-teal) 20%, transparent), transparent 55%),
    linear-gradient(165deg, var(--brand-bg), color-mix(in srgb, var(--brand-bg) 88%, var(--brand-action) 12%));
  box-shadow: inset 0 0 0 16px color-mix(in srgb, var(--surface) 92%, transparent);
}
.brand-layout-thumb-auth-split {
  background: linear-gradient(90deg, var(--brand-gradient-masthead) 0 48%, var(--brand-bg) 48% 100%);
  box-shadow: inset calc(48% + 8px) 10px 0 -4px color-mix(in srgb, var(--surface) 94%, transparent);
}
.brand-layout-thumb-auth-immersive {
  background: var(--brand-gradient-auth-immersive);
  box-shadow: inset 0 0 0 14px color-mix(in srgb, var(--surface) 90%, transparent);
}
.brand-layout-thumb-catalog-hero { background: var(--brand-gradient-masthead); }
.brand-layout-thumb-catalog-compact {
  background:
    linear-gradient(180deg, var(--brand-gradient-masthead) 0 52%, transparent 52%),
    var(--surface);
}
.brand-layout-thumb-catalog-minimal {
  background: linear-gradient(180deg, var(--surface) 0 68%, var(--surface-muted) 68%);
  box-shadow: inset 0 12px 0 -8px var(--line);
}
.brand-layout-title {
  font-size: .84rem;
  font-weight: 700;
  color: var(--ink);
}
.brand-layout-hint {
  font-size: .72rem;
  line-height: 1.35;
  color: var(--ink-soft);
}
.brand-dev-fold {
  margin-top: 1rem;
  border: 1px dashed color-mix(in srgb, var(--line) 90%, var(--ink-soft));
  border-radius: 14px;
  padding: .55rem .85rem .75rem;
}
.brand-dev-fold > summary {
  cursor: pointer;
  font-weight: 600;
  font-size: .86rem;
  color: var(--ink-soft);
}
.brand-studio-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 1rem;
  padding: .85rem 1rem;
  margin-top: .15rem;
  border: 1px solid var(--line);
  border-radius: var(--brand-studio-radius);
  background: color-mix(in srgb, var(--surface) 92%, var(--brand-bg) 8%);
  position: sticky;
  bottom: .75rem;
  z-index: 2;
  box-shadow: 0 8px 28px -18px color-mix(in srgb, var(--brand-navy) 28%, transparent);
}
.brand-studio-actions-hint {
  font-size: .82rem;
  max-width: 28rem;
  line-height: 1.4;
}
.brand-assets { display: grid; gap: .75rem; }
.brand-asset-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--brand-studio-radius);
  background: var(--surface);
}
.brand-asset-preview {
  display: grid;
  place-items: center;
  width: 112px;
  height: 112px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--surface-muted) 80%, #fff), var(--surface-muted));
  overflow: hidden;
}
.brand-asset-preview img {
  max-width: 78%;
  max-height: 78%;
  object-fit: contain;
}
.brand-asset-preview-sm {
  width: 72px;
  height: 72px;
  border-radius: 18px;
}
.brand-asset-preview-sm img {
  max-width: 42px;
  max-height: 42px;
}
.brand-asset-preview-wide {
  width: 128px;
  height: 80px;
  border-radius: 14px;
}
.brand-asset-preview-wide img {
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  object-fit: cover;
}
.brand-asset-body { min-width: 0; display: grid; gap: .45rem; align-content: start; }
.brand-asset-title {
  margin: 0;
  font-size: .98rem;
  font-weight: 700;
  letter-spacing: -.01em;
}
.brand-asset-text {
  margin: 0;
  font-size: .84rem;
  line-height: 1.45;
  color: var(--ink-soft);
}
.brand-asset-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .55rem;
  align-items: center;
  margin-top: .25rem;
}
.brand-asset-form .file-field { min-width: 0; }
.brand-asset-error {
  grid-column: 1 / -1;
  margin: .15rem 0 0;
  font-size: .82rem;
  color: var(--danger, #c0392b);
}
.brand-asset-reset { margin-top: .15rem; }
.brand-studio-stage {
  position: sticky;
  top: 5.5rem;
}
.brand-stage-card {
  padding: 1rem 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--brand-studio-radius);
  background:
    radial-gradient(120% 80% at 100% 0%, color-mix(in srgb, var(--brand-action) 8%, transparent), transparent 55%),
    var(--surface);
  box-shadow: 0 18px 40px -28px color-mix(in srgb, var(--brand-navy) 35%, transparent);
}
.brand-stage-card.brand-preview-flash {
  outline: 2px solid var(--accent, #2d6cdf);
  outline-offset: 2px;
  transition: outline-color 0.2s ease;
}
.brand-stage-label {
  margin: 0 0 .75rem;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.brand-stage-identity {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: .9rem;
}
.brand-stage-mark {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
}
.brand-stage-title {
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}
.brand-stage-sub {
  font-size: .78rem;
  line-height: 1.35;
  color: var(--ink-soft);
}
.brand-preview-sidebar {
  display: grid;
  gap: .2rem;
  padding: .55rem .5rem;
  margin-bottom: .55rem;
  border-radius: 12px;
  background: var(--brand-navy, #0d1b2a);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.06);
}
.brand-preview-sidebar-item {
  padding: .38rem .55rem;
  border-radius: 8px;
  font-size: .68rem;
  font-weight: 650;
  color: rgba(232,238,246,.72);
  line-height: 1.2;
}
.brand-preview-sidebar-item.is-active {
  background: var(--brand-gradient-sidebar-active);
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.08);
}
body.brand-live-preview-active .app-sidebar {
  background: var(--brand-navy, #0d1b2a) !important;
}
body.brand-live-preview-active .app-side-nav a.is-active {
  background: var(--brand-gradient-sidebar-active) !important;
  color: #fff;
}
body.brand-live-preview-active .brand-preview-sidebar-item.is-active {
  background: var(--brand-gradient-sidebar-active);
}
.brand-stage-surfaces {
  display: grid;
  gap: .45rem;
  margin-bottom: .75rem;
}
.brand-stage-surface {
  position: relative;
  min-height: 64px;
  border-radius: 12px;
  overflow: hidden;
  display: grid;
  place-items: end start;
  padding: .55rem .65rem;
  color: rgba(255,255,255,.92);
  font-size: .72rem;
  font-weight: 700;
  text-shadow: 0 1px 2px rgba(0,0,0,.28);
}
.brand-stage-auth {
  background: var(--brand-gradient-auth);
  color: var(--ink);
  text-shadow: none;
  min-height: 88px;
}
.brand-stage-auth-split {
  background: linear-gradient(90deg, var(--brand-gradient-masthead) 0 46%, var(--brand-bg) 46% 100%);
}
.brand-stage-auth-split .brand-stage-auth-card {
  inset: 14% 8% auto auto;
  width: 46%;
  height: 48%;
}
.brand-stage-auth-immersive {
  background: var(--brand-gradient-auth-immersive);
  color: rgba(255,255,255,.94);
  text-shadow: 0 1px 2px rgba(0,0,0,.28);
}
.brand-stage-auth-immersive .brand-stage-auth-card {
  background: color-mix(in srgb, var(--surface) 88%, transparent);
}
.brand-stage-masthead-hero { background: var(--brand-gradient-masthead); }
.brand-stage-masthead-compact {
  background:
    linear-gradient(180deg, var(--brand-gradient-masthead) 0 52%, transparent 52%),
    color-mix(in srgb, var(--brand-bg) 40%, var(--surface));
}
.brand-stage-masthead-minimal {
  background: linear-gradient(180deg, var(--surface) 0 72%, var(--surface-muted) 72%);
  color: var(--ink-soft);
  text-shadow: none;
  box-shadow: inset 0 14px 0 -10px var(--line);
}
.brand-stage-auth-card {
  position: absolute;
  inset: 18% 18% auto;
  height: 42%;
  border-radius: 10px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  box-shadow: 0 8px 20px -12px rgba(0,0,0,.25);
}
.brand-stage-masthead { background: var(--brand-gradient-masthead); }
.brand-stage-cover { background: var(--brand-gradient-cover); }
.brand-stage-foot { line-height: 1.4; }
@media (max-width: 980px) {
  .brand-studio-layout { grid-template-columns: 1fr; }
  .brand-studio-stage { position: static; order: -1; }
}
@media (max-width: 720px) {
  .brand-fields-2 { grid-template-columns: 1fr; }
  .brand-asset-card { grid-template-columns: 1fr; }
  .brand-asset-form { grid-template-columns: 1fr; }
  .brand-color-row { flex-wrap: wrap; }
}


body.opt-compactMode .panel { padding: .8rem .9rem; }
body.opt-compactMode .item { padding: .95rem 1rem; }
body.opt-compactMode .module { padding: .85rem 1rem; }
body.opt-compactMode .stack { gap: .55rem; }
.topbar-date {
  display: none;
  font-size: .8rem;
  color: var(--ink-soft);
  white-space: nowrap;
  padding: .25rem .6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
}

.bottom-nav { display: none; }
@media (max-width: 991.98px) {
  body:has(.bottom-nav) { padding-bottom: 72px; }
  .bottom-nav {
    display: flex !important;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: var(--surface);
    border-top: 1px solid var(--line);
    box-shadow: 0 -4px 16px rgba(21, 32, 43, 0.08);
    padding: .45rem .3rem calc(.45rem + env(safe-area-inset-bottom));
    justify-content: space-around;
  }
  [data-theme="dark"] .bottom-nav,
  [data-bs-theme="dark"] .bottom-nav { background: var(--surface); }
  .bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .15rem;
    color: var(--ink-soft);
    font-size: .68rem;
    font-weight: 600;
    padding: .35rem .55rem;
    border-radius: var(--radius-sm);
    position: relative;
    text-decoration: none;
  }
  .bottom-nav a.is-active {
    color: var(--accent);
    background: var(--accent-soft);
  }
  .bottom-nav a i { font-size: 1.15rem; line-height: 1; }
  .bottom-nav .badge,
  .bottom-nav .nav-badge {
    position: absolute;
    top: 0;
    right: 10px;
    transform: scale(.85);
  }
}

@media (max-width: 900px) {
  .reader { grid-template-columns: 1fr; }
  .reader-side {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(100%, 360px);
    max-width: 92vw;
    z-index: 120;
    border-radius: 0;
    max-height: none;
    display: none;
    overflow: auto;
    background: var(--surface);
    border: none;
    border-right: 1px solid var(--line);
    box-shadow: 0 12px 40px rgba(13, 27, 42, .28);
    padding: 1rem 1rem 1.35rem;
  }
  .reader-side.open { display: block; }
  .reader-side-backdrop {
    position: fixed;
    inset: 0;
    z-index: 115;
    background: rgba(13, 27, 42, .48);
    display: none;
  }
  .reader-side-backdrop.is-open { display: block; }
  body.reader-nav-open { overflow: hidden; }
  .side-open { display: inline-flex; }
  .reader-main { width: 100%; min-width: 0; }
  .grid-2 { grid-template-columns: 1fr; }
  body.has-shell .app-content {
    --app-pad-x: 1rem;
    --app-pad-y: 1rem;
    padding: var(--app-pad-y) var(--app-pad-x) calc(5.5rem + env(safe-area-inset-bottom));
  }
}

@media (max-width: 720px) {
  .burger {
    display: block;
    margin-left: auto;
    font-size: 1.15rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    color: var(--ink);
    padding: .25rem .75rem;
    cursor: pointer;
  }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    gap: .8rem;
    box-shadow: var(--shadow-2);
  }
  .nav.open { display: flex; }
  .page { padding: 1rem .8rem 3rem; }
  .item { padding: 1rem; }
  .course-hero { padding: 1.15rem; }
  .prose pre { font-size: .78rem; }
  .module .module-head { grid-template-columns: auto 1fr auto; }
  .module-progress { display: none; }
  .file-download { flex-direction: column; align-items: flex-start; }
}

@keyframes flashPop { from { transform: translateY(-6px); opacity: 0 } to { transform: none; opacity: 1 } }
.flash-pop { animation: flashPop .25s ease-out; }

/* ---------- админ-панель: плотные таблицы ---------- */
.table td .row.tight { gap: .25rem; }
.table td select { min-height: 36px; padding: .4rem .55rem; font-size: .86rem; }
.table td .icon-btn { width: 30px; min-width: 30px; height: 30px; font-size: .78rem; }
.table td .btn.sm { min-height: 32px; padding: .25rem .6rem; font-size: .8rem; }
.table td .w120 { min-height: 32px; padding: .3rem .5rem; font-size: .84rem; }

/* ---------- профиль ---------- */
.profile-card { max-width: 620px; }
.profile-ava-block { display: flex; justify-content: center; }
.profile-meta { border-top: 1px solid var(--line); padding-top: .8rem; }
.profile-meta p { margin: .25rem 0; font-size: .92rem; }

/* ---------- hue-range: кастомный акцент ---------- */
.hue-range { accent-color: var(--accent); }
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
  border: 1px solid var(--line);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--surface);
  margin-top: -8px;
  cursor: pointer;
}

/* ---------- code editor light mode ---------- */
[data-theme="light"] .code-editor {
  background: #1b2733;
  color: #e6edf3;
}

/* ---------- quiz radio ---------- */
.quiz-opt input[type="radio"] {
  width: 1.125rem;
  min-width: 1.125rem;
  height: 1.125rem;
  min-height: 1.125rem;
  max-width: 1.125rem;
  max-height: 1.125rem;
}

/* ---------- sub-card spacing ---------- */
.sub-card { margin-bottom: .6rem; }
.sub-card + .sub-card { margin-top: 0; }

.admin-app-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.25rem;
}
.admin-app-info { min-width: min(100%, 240px); flex: 1 1 200px; }
.admin-app-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
  flex: none;
}
.admin-app-actions .btn { min-height: 40px; }

.mod-board { display: flex; flex-direction: column; gap: 0; }
.mod-board .section-title { margin-top: 1.35rem; }
.mod-board > .section-title:first-child { margin-top: 0; }
.mod-course-card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: .85rem;
  margin-bottom: .85rem;
  padding: 1.1rem 1.2rem;
}
.mod-course-main {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .35rem;
  min-width: 0;
}
.mod-course-topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem .65rem;
  width: 100%;
}
.mod-course-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
  min-width: 0;
}
.mod-course-title a { color: var(--accent); text-decoration: none; }
.mod-course-title a:hover { text-decoration: underline; }
.mod-course-meta,
.mod-course-desc {
  margin: 0;
  font-size: .9rem;
  line-height: 1.4;
  max-width: 72ch;
}
.mod-course-topline .tag {
  flex: none;
  width: auto;
  max-width: max-content;
}
.mod-course-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: .65rem;
  margin: 0;
  width: 100%;
}
.mod-course-input {
  width: 100%;
  margin: 0;
  box-sizing: border-box;
}
.mod-course-btns {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}
.mod-course-btns .btn {
  flex: 0 0 auto;
  min-height: 40px;
  width: auto;
}

/* ---------- панель «добавить в главу» ---------- */
.panel .row.wrap .btn { min-height: 40px; }

/* ---------- редактор глав ---------- */
.chapter-header { margin-bottom: 1.2rem; }
.chapter-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1rem;
  margin-bottom: .55rem;
}
.chapter-header-top .eyebrow { margin: 0; }
.chapter-crumb a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 650;
}
.chapter-crumb a:hover { color: var(--accent); text-decoration: underline; }
.crumb-sep { margin: 0 .35rem; opacity: .45; }
.chapter-header-actions {
  display: flex;
  align-items: center;
  gap: .4rem;
  flex: none;
}
.chapter-rename-form {
  display: grid;
  gap: .4rem;
  max-width: 100%;
}
.chapter-rename-caption {
  margin: 0;
  font-size: .88rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
}
.chapter-rename-row {
  display: flex;
  align-items: stretch;
  gap: .55rem;
  max-width: 100%;
  min-width: 0;
}
.chapter-rename-row input {
  flex: 1 1 auto;
  min-width: 0;
  width: auto;
  max-width: none;
  height: 44px;
  min-height: 44px;
  margin: 0;
  padding: 0 .95rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: 12px;
  box-sizing: border-box;
}
.chapter-rename-row .btn {
  flex: none;
  height: 44px;
  min-height: 44px;
  padding: 0 1.15rem;
  align-self: stretch;
  box-sizing: border-box;
}
.chapter-rename-label {
  flex: 1 1 280px;
  min-width: 0;
  margin: 0;
}
@media (max-width: 560px) {
  .chapter-rename-row { flex-wrap: wrap; }
  .chapter-rename-row .btn { width: 100%; }
}
.chapter-edit-hint {
  margin: .55rem 0 0;
  font-size: .88rem;
  line-height: 1.45;
}
.reader-main.is-studio .chapter-header-v3 {
  /* Не sticky: иначе «Блоки на странице» и форма названия залипают при скролле.
     Sticky только у .rich-toolbar внутри редактора содержимого. */
  margin-bottom: 1.25rem;
  padding-bottom: .85rem;
}

.item-edit-shell {
  border: none;
  border-radius: 0;
  /* visible: иначе position:sticky у панели редактора не работает */
  overflow: visible;
  background: transparent;
}
.item-edit-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  padding: .65rem .9rem;
  background: var(--surface-muted);
  border-bottom: 1px solid var(--line);
}
.item-edit-head-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem .75rem;
  min-width: 0;
}
.item-edit-title {
  font-size: .92rem;
  font-weight: 600;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: min(28rem, 55vw);
}
.item-type-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.item-type-badge--quiz { color: #0a7a70; }
.item-type-badge--homework { color: var(--accent); }
.item-type-chip {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  flex: 0 0 auto;
  padding: .15rem .45rem;
  border-radius: 6px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .02em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  background: var(--surface-muted);
  color: var(--ink-soft);
}
.item-type-chip--quiz {
  color: #0a7a70;
  border-color: color-mix(in srgb, #0D9488 35%, var(--line));
  background: color-mix(in srgb, #0D9488 12%, var(--surface));
}
.item-type-chip--homework {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--line));
  background: var(--accent-soft);
}
.chapter-blocks-nav {
  margin: .85rem 0 1.1rem;
  padding: .85rem 1rem 1rem;
}
.chapter-blocks-nav-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .35rem .75rem;
  margin-bottom: .65rem;
}
.chapter-blocks-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .35rem;
}
.chapter-blocks-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .45rem;
  align-items: center;
  padding: .35rem .45rem .35rem .55rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}
.chapter-blocks-jump {
  display: flex;
  align-items: center;
  gap: .55rem;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}
.chapter-blocks-jump:hover .chapter-blocks-title { color: var(--accent); }
.chapter-blocks-title {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .9rem;
  font-weight: 600;
}
.chapter-blocks-actions .crud-tools { flex-wrap: nowrap; }
@media (max-width: 640px) {
  .chapter-blocks-row { grid-template-columns: 1fr; }
  .chapter-blocks-actions { justify-self: end; }
}
.item-edit-form { margin: 0; border: none; border-radius: 0; box-shadow: none; padding: 1.05rem 1.15rem 1.2rem; gap: 1rem; }
.item-edit-form.stack { gap: 1rem; }
.item-edit-section {
  display: grid;
  gap: .75rem;
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
}
.item-edit-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  padding-top: .15rem;
}
.video-file-field {
  display: grid;
  gap: .4rem;
  padding: .85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--accent) 18%, var(--line));
  background: var(--callout-bg);
}
.video-file-field .file-label { margin: 0; display: grid; gap: .4rem; font-weight: 600; }
.video-file-field input[type="file"] { background: var(--surface); }
.item-preview-fold {
  border-top: 1px dashed var(--line);
  background: var(--surface);
}
.item-preview-fold summary {
  padding: .65rem .9rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--ink-soft);
  font-size: .88rem;
}
.item-preview-body { padding: .5rem .9rem 1rem; }
.item-edit-link { margin-top: .6rem; text-align: right; }

.form-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
  width: 100%;
  min-width: 0;
}
@media (max-width: 640px) { .form-grid-2 { grid-template-columns: 1fr; } }

.add-blocks { margin-top: 1.5rem; }
.activity-chooser { padding: 1.15rem 1.2rem 1.35rem; }
.activity-chooser-head { margin-bottom: .9rem; }
.activity-chooser-title {
  margin-bottom: 1rem;
  max-width: 420px;
}
.activity-groups {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 1rem;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--line);
}
.activity-group-tab {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .4rem .85rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
}
.activity-group-tab:hover {
  background: var(--surface-muted);
  color: var(--ink);
}
.activity-group-tab.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.activity-section { margin-bottom: 1.1rem; }
.activity-section.is-hidden { display: none; }
.activity-section-title {
  display: flex;
  align-items: center;
  gap: .4rem;
  margin: 0 0 .55rem;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.activity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: .55rem;
}
.activity-tile {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .75rem;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: .75rem .85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-muted);
  color: var(--ink);
  cursor: pointer;
  transition: border-color .15s, background .15s, box-shadow .15s, transform .12s;
}
.activity-tile:hover {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: var(--shadow-1);
  transform: translateY(-1px);
}
.activity-tile:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.activity-tile-ico {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.2rem;
  flex: none;
}
.activity-tile-body { min-width: 0; display: grid; gap: .15rem; }
.activity-tile-label {
  font-weight: 700;
  font-size: .95rem;
  line-height: 1.2;
}
.activity-tile-hint {
  color: var(--ink-soft);
  font-size: .8rem;
  line-height: 1.35;
}
.activity-tile-add {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: var(--surface);
  border: 1px solid var(--line);
  flex: none;
}
.activity-tile:hover .activity-tile-add {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

/* legacy type-grid kept harmless if referenced elsewhere */
.type-grid { display: none; }
.type-card, .type-card-title, .type-card-btn { display: none; }

.file-edit-zone { margin-bottom: .5rem; }
.file-upload-row { margin-bottom: .75rem; }
.embed-preview { margin-top: .5rem; border-radius: var(--radius-sm); overflow: hidden; }

/* ---------- страница курса: настройки справа ---------- */
.course-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
  align-items: start;
}
.course-main { min-width: 0; }
.course-settings {
  position: sticky;
  top: 88px;
}
.course-cover {
  height: auto;
  min-height: 180px;
  border-radius: 0;
  margin: 0;
  background-image: var(--course-cover-default, url("/static/branding/course-cover-default.png"));
  background-size: cover;
  background-position: center;
  background-color: var(--surface-muted);
  border-bottom: none;
  border-right: 1px solid var(--line);
}
@media (max-width: 720px) {
  .course-cover {
    min-height: 160px;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
}
.cover-preview {
  display: block;
  width: 100%;
  max-height: 120px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: .5rem;
  border: 1px solid var(--line);
}
.settings-status { margin-bottom: .5rem; }
.danger-zone {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
/* module-edit-row grid defined with outline-rename styles below */

/* ---------- профиль ---------- */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  align-items: start;
  max-width: 900px;
}
@media (max-width: 800px) {
  .course-layout { grid-template-columns: 1fr; }
  .course-settings { position: static; }
  .profile-grid { grid-template-columns: 1fr; }
}

/* ---------- каталог: панели создания ---------- */
.editor-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 0;
}
.editor-panel { margin: 0; }
.empty-state {
  text-align: center;
  padding: 2.6rem 1.35rem;
  position: relative;
}
.empty-state::before,
.empty-panel::before,
.catalog-empty::before,
.completion-empty::before {
  content: "";
  display: block;
  width: 2.25rem;
  height: 2px;
  margin: 0 auto .95rem;
  border-radius: 1px;
  background: linear-gradient(
    90deg,
    var(--brand-navy, var(--ink)),
    var(--brand-teal, var(--teal))
  );
  opacity: .85;
}
.empty-panel {
  text-align: center;
  padding: 2.35rem 1.6rem;
  max-width: 36rem;
  margin: 0.5rem auto 1rem;
  background:
    linear-gradient(
      165deg,
      color-mix(in srgb, var(--brand-teal, var(--teal)) 5%, var(--surface)) 0%,
      var(--surface) 42%
    );
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}
.empty-panel h2 {
  margin: 0 0 .45rem;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.02em;
}
.empty-panel .muted {
  margin: 0 auto;
  max-width: 28rem;
  line-height: 1.5;
}
/* ---------- страница ошибки (404 / 403 / 500): академический фолиант ---------- */
.error-stage {
  width: min(720px, 100%);
  margin: clamp(1.5rem, 5vh, 3.5rem) auto;
  padding: 0 1rem 2rem;
}
.error-folio {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1.1rem, 3vw, 2rem);
  align-items: start;
  padding: clamp(1.4rem, 3.5vw, 2.4rem) clamp(1.2rem, 3vw, 2.2rem);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--brand-navy, var(--ink)) 6%, transparent) 0 3.5rem, transparent 3.5rem),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  position: relative;
  overflow: hidden;
}
.error-folio::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(
    180deg,
    var(--brand-navy, var(--ink)) 0%,
    var(--brand-teal, var(--teal)) 100%
  );
}
.error-folio-mark {
  margin: 0;
  padding-top: .15rem;
  font-family: var(--font);
  font-size: clamp(2.75rem, 8vw, 4.25rem);
  font-weight: 800;
  line-height: .92;
  letter-spacing: -.04em;
  color: var(--brand-navy, var(--ink));
  font-variant-numeric: tabular-nums;
  animation: error-folio-in .55s ease both;
}
.error-folio-body {
  min-width: 0;
  padding-top: .2rem;
  animation: error-folio-in .55s ease .08s both;
}
.error-kicker {
  margin: 0 0 .35rem;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.error-folio-body h1 {
  margin: 0 0 .65rem;
  font-size: clamp(1.35rem, 2.6vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.25;
  color: var(--ink);
}
.error-lead {
  margin: 0 0 1.35rem;
  max-width: 38rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.55;
}
.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  align-items: center;
}
.error-actions .btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}
.error-support {
  margin: 1.15rem 0 0;
}
@keyframes error-folio-in {
  from { opacity: 0; transform: translateY(.45rem); }
  to { opacity: 1; transform: none; }
}
@media (max-width: 560px) {
  .error-folio {
    grid-template-columns: 1fr;
    gap: .75rem;
  }
  .error-folio-mark {
    padding-bottom: .35rem;
    border-bottom: 1px solid var(--line);
  }
}
[data-theme="dark"] .error-folio,
[data-bs-theme="dark"] .error-folio {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--teal) 10%, transparent) 0 3.5rem, transparent 3.5rem),
    var(--surface);
}
[data-theme="dark"] .error-folio-mark,
[data-bs-theme="dark"] .error-folio-mark {
  color: var(--ink);
}
html.a11y-high-contrast .error-folio {
  background: #ffffff !important;
  border-color: #000000 !important;
  box-shadow: none !important;
}
html.a11y-high-contrast .error-folio::before {
  background: #000000 !important;
  width: 5px;
}
html.a11y-high-contrast .error-folio-mark,
html.a11y-high-contrast .error-folio-body h1,
html.a11y-high-contrast .error-kicker,
html.a11y-high-contrast .error-lead {
  color: #000000 !important;
}
html.a11y-no-motion .error-folio-mark,
html.a11y-no-motion .error-folio-body {
  animation: none !important;
}
@media (prefers-reduced-motion: reduce) {
  .error-folio-mark,
  .error-folio-body {
    animation: none !important;
  }
}
/* legacy class kept for any cached markup */
.error-card {
  width: min(460px, 100%);
}
.error-card h1 {
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  margin: 0 0 .6rem;
}
.error-card .auth-alt {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  justify-content: center;
  align-items: center;
}
.user-cap-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
}
.account-facts-caps .user-cap-tags { margin-top: .2rem; }
.empty-illust {
  width: min(360px, 100%);
  height: auto;
  margin: 0 auto 1rem;
  border: 1px solid var(--line);
}
.user-edit-card { margin: 0; }
.user-edit-head { margin-bottom: .85rem; padding-bottom: .75rem; border-bottom: 1px solid var(--line); }
.user-edit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

/* ---------- админ: пользователи ---------- */
.admin-users-page {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 1080px;
}
.admin-users-count {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .92rem;
  font-weight: 600;
}
.admin-create-user { padding: 0; overflow: hidden; }
.admin-create-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .35rem 1rem;
  padding: 1rem 1.2rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.admin-create-summary::-webkit-details-marker { display: none; }
.admin-create-summary::after {
  content: "▾";
  margin-left: auto;
  color: var(--ink-soft);
  transition: transform .15s ease;
}
.admin-create-user[open] .admin-create-summary::after { transform: rotate(180deg); }
.admin-create-title {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-weight: 700;
  color: var(--ink);
}
.admin-create-form {
  padding: 0 1.2rem 1.2rem;
  border-top: 1px solid var(--line);
}
.admin-users-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.user-admin-card {
  margin: 0;
  padding: 0;
  overflow: hidden;
  border-left: 3px solid color-mix(in srgb, var(--accent) 55%, var(--line));
}
.user-admin-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem 1rem;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-muted) 65%, var(--surface));
}
.user-admin-identity {
  display: flex;
  align-items: flex-start;
  gap: .85rem;
  min-width: 0;
}
.user-admin-letter {
  flex: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
}
.user-admin-letter--sm { width: 48px; height: 48px; font-size: 1.05rem; border-radius: 10px; }
.user-admin-avatar,
.user-admin-avatar-preview {
  flex: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--surface-muted);
}
.user-admin-avatar-preview { width: 48px; height: 48px; border-radius: 10px; }
.user-admin-avatar-field {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding-top: .15rem;
}
.user-admin-avatar-label {
  font-size: .86rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.user-admin-avatar-edit {
  display: flex;
  align-items: center;
  gap: .65rem;
  min-width: 0;
}
.user-admin-avatar-file {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  margin: 0;
  padding: .35rem .55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-muted);
  font: inherit;
  font-size: .82rem;
  color: var(--ink-soft);
  line-height: 1.3;
}
.user-admin-avatar-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: .5rem;
}
.user-admin-avatar-actions .btn {
  flex: 0 0 auto;
  min-height: 40px;
  height: 40px;
  padding: 0 .9rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  box-sizing: border-box;
}
.user-admin-name {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.2;
}
.user-admin-sub { font-size: .88rem; margin-top: .15rem; }
.user-admin-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
  margin-top: .45rem;
}
.user-admin-reason {
  margin-top: .45rem;
  font-size: .86rem;
  padding: .45rem .65rem;
  border-radius: var(--radius-chip);
  background: color-mix(in srgb, var(--danger) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--danger) 18%, var(--line));
}
.user-admin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0;
}
.user-admin-block {
  padding: 1rem 1.2rem;
  border-top: 1px solid var(--line);
}
.user-admin-grid .user-admin-block:first-child {
  border-right: 1px solid var(--line);
}
.user-admin-block--courses {
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-muted) 40%, var(--surface));
}
.user-admin-block-title {
  margin: 0 0 .75rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.user-admin-form { gap: .65rem; }
.user-admin-form .form-actions {
  margin-top: .35rem;
  padding-top: .65rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  align-items: center;
}
.user-admin-caps { display: flex; flex-direction: column; gap: .85rem; }
.user-admin-caps-fold {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-chip);
  background: var(--surface);
  overflow: hidden;
}
.user-admin-caps-fold > summary {
  list-style: none;
  cursor: pointer;
  padding: .55rem .7rem;
  font-size: .86rem;
  font-weight: 600;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  user-select: none;
}
.user-admin-caps-fold > summary::-webkit-details-marker { display: none; }
.user-admin-caps-fold > summary::after {
  content: "▾";
  color: var(--ink-faint);
  font-size: .75rem;
  transition: transform .15s ease;
}
.user-admin-caps-fold[open] > summary::after { transform: rotate(180deg); }
.user-admin-caps-fold-body {
  padding: 0 .7rem .75rem;
  border-top: 1px solid var(--line);
}
.user-admin-cap-group { margin: 0; }
.user-admin-cap-list {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .75rem;
}
.user-admin-cap {
  margin: 0;
  font-size: .9rem;
}
.user-admin-danger {
  margin-top: 1rem;
  padding: .85rem .9rem;
  border: 1px dashed color-mix(in srgb, var(--danger) 28%, var(--line));
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--danger) 4%, var(--surface));
  display: flex;
  flex-direction: column;
  gap: .55rem;
}
.user-admin-danger .user-admin-block-title {
  color: color-mix(in srgb, var(--danger) 70%, var(--ink-soft));
  margin-bottom: .15rem;
}
.user-admin-danger .btn-danger,
.user-admin-danger .btn-outline-danger {
  font-weight: 600;
}
.user-admin-inline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}
.user-admin-inline .grow {
  min-width: 160px;
  flex: 1 1 180px;
  width: auto;
  max-width: none;
}
.user-admin-inline .btn { flex: 0 0 auto; }
@media (max-width: 860px) {
  .user-admin-grid { grid-template-columns: 1fr; }
  .user-admin-grid .user-admin-block:first-child { border-right: none; }
}
@media (max-width: 800px) {
  .editor-panels { grid-template-columns: 1fr; }
  .user-edit-grid { grid-template-columns: 1fr; }
}

/* ---------- enrollments page ---------- */
.enroll-manual {
  margin-bottom: 1rem;
}
.enroll-manual-form {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: .55rem .65rem;
}
.enroll-manual-form select {
  flex: 1 1 200px;
  min-width: 0;
  width: auto;
  max-width: none;
}
.enroll-list {
  display: flex;
  flex-direction: column;
  gap: .55rem;
}
.enroll-card {
  margin: 0;
  padding: 0;
  overflow: hidden;
  box-shadow: none;
}
.enroll-card-body {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem 1rem;
  padding: .85rem 1rem;
}
.enroll-card-main {
  min-width: 0;
  flex: 1 1 240px;
  display: grid;
  gap: .25rem;
}
.enroll-card-who {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .35rem .5rem;
}
.enroll-card-who b {
  font-size: .98rem;
}
.enroll-card-course {
  font-weight: 600;
  color: var(--ink);
}
.enroll-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem .55rem;
  font-size: .84rem;
  color: var(--ink-soft);
}
.enroll-card-actions {
  flex: 0 1 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  max-width: 100%;
}
.enroll-card-actions input.grow {
  min-width: 160px;
  flex: 1 1 180px;
  width: auto;
  max-width: none;
}
.enroll-card-actions .btn { flex: 0 0 auto; }
.enroll-card-decision {
  margin: 0;
  font-size: .86rem;
  color: var(--ink-soft);
  max-width: 28rem;
}
.enroll-empty {
  padding: 2rem 1rem;
  text-align: center;
}
.enroll-empty h2 { margin: 0 0 .35rem; font-size: 1.05rem; }

/* ---------- профиль / 2FA ---------- */
.profile-layout {
  display: grid;
  grid-template-columns: minmax(280px, 380px) 1fr;
  gap: 1.2rem;
  align-items: start;
}
.subsection-title { margin: 0; font-size: 1rem; font-weight: 600; }
.sep { border: 0; border-top: 1px solid var(--line); margin: .4rem 0; }
.totp-setup {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}
.totp-qr {
  width: 180px;
  height: 180px;
  border: 1px solid var(--line);
  background: #fff;
  padding: .4rem;
}
.role-legend {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
  display: grid;
  gap: .45rem;
}
.role-legend b { color: var(--ink); }
.nav-link i, .btn i, .section-title i, .user-dropdown-item i { margin-right: .25rem; }
.icon-btn i { margin: 0; font-size: .95rem; line-height: 1; }
.bn-ico { display: block !important; font-size: 1.1rem; margin: 0 0 .1rem; }
.gear-chevron { font-size: .7rem; margin: 0; transition: transform .2s; }
@media (max-width: 800px) {
  .profile-layout { grid-template-columns: 1fr; }
  .totp-setup { grid-template-columns: 1fr; justify-items: start; }
}


/* ---------- Bootstrap chrome & catalog polish ---------- */
.app-navbar {
  background: color-mix(in srgb, var(--surface) 92%, transparent) !important;
  backdrop-filter: blur(10px);
  border-color: var(--line) !important;
  box-shadow: var(--shadow-1);
}
.app-navbar .navbar-brand {
  color: var(--ink);
  font-weight: 700;
  font-size: 1.05rem;
}
.app-navbar .navbar-brand:hover { color: var(--ink); text-decoration: none; }
.app-navbar .nav-link {
  display: inline-flex !important;
  align-items: center;
  gap: .35rem;
  color: var(--ink-soft) !important;
  font-weight: 600;
  font-size: .94rem;
  border-radius: 999px;
  padding: .45rem .95rem !important;
  margin: 0 .05rem;
  min-height: auto;
}
.app-navbar .nav-link:hover {
  background: var(--surface-muted);
  color: var(--ink) !important;
  text-decoration: none;
}
.app-navbar .nav-link.active {
  background: var(--accent-soft);
  color: var(--accent) !important;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}
[data-bs-theme="dark"] .app-navbar .nav-link.active,
[data-theme="dark"] .app-navbar .nav-link.active {
  box-shadow: inset 0 0 0 1px rgba(91, 159, 212, 0.35);
}
.app-navbar .navbar-toggler {
  border-color: var(--line);
  border-radius: 12px;
}
.avatar { border-radius: 50%; object-fit: cover; background: var(--surface-muted); }
.avatar-mini { width: 24px; height: 24px; }
.avatar-letter {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: .75rem; font-weight: 700; color: var(--accent); background: var(--accent-soft);
}

.cat-filters { display: flex; flex-wrap: wrap; gap: .45rem; }
.cat-chip {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .35rem .75rem; border-radius: var(--radius-chip);
  border: 1px solid var(--line); background: var(--surface);
  color: var(--ink-soft); font-size: .88rem; font-weight: 600;
  text-decoration: none;
}
.cat-chip .bi { font-size: .95em; opacity: .9; }
.cat-chip:hover { background: var(--surface-muted); color: var(--ink); text-decoration: none; }
.cat-chip.is-active {
  background: var(--accent); border-color: var(--accent); color: var(--accent-ink);
}
/* Pastel category chips: always dark ink on pastel (never follow theme --ink) */
.cat-badge {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  padding: .22rem .55rem;
  border-radius: var(--radius-chip);
  background: var(--cat-bg, #e8ecf1);
  color: #0d1b2a;
  border: 1px solid color-mix(in srgb, var(--cat-bg, #e8ecf1) 55%, #0d1b2a 12%);
  font-size: .78rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .02em;
}
.cat-chip.cat-chip-colored {
  background: var(--cat-bg, #e8ecf1);
  border-color: color-mix(in srgb, var(--cat-bg, #e8ecf1) 50%, #0d1b2a 14%);
  color: #0d1b2a;
}
.cat-chip.cat-chip-colored:hover {
  filter: brightness(0.97);
  color: #0d1b2a;
}
.cat-chip.cat-chip-colored.is-active {
  background: var(--cat-bg, #e8ecf1);
  border-color: #0d1b2a;
  color: #0d1b2a;
  box-shadow: 0 0 0 2px color-mix(in srgb, #0d1b2a 22%, transparent);
}
/* Dark theme: translucent category tint on surface + light text */
[data-theme="dark"] .cat-badge,
[data-bs-theme="dark"] .cat-badge,
[data-theme="dark"] .cat-chip.cat-chip-colored,
[data-bs-theme="dark"] .cat-chip.cat-chip-colored {
  background: color-mix(in srgb, var(--cat-bg, #e8ecf1) 32%, var(--surface-muted, #1a2a40));
  color: #f2f6fb;
  border-color: color-mix(in srgb, var(--cat-bg, #e8ecf1) 42%, var(--line, #243652));
}
[data-theme="dark"] .cat-chip.cat-chip-colored:hover,
[data-bs-theme="dark"] .cat-chip.cat-chip-colored:hover {
  filter: brightness(1.08);
  color: #ffffff;
}
[data-theme="dark"] .cat-chip.cat-chip-colored.is-active,
[data-bs-theme="dark"] .cat-chip.cat-chip-colored.is-active {
  background: color-mix(in srgb, var(--cat-bg, #e8ecf1) 40%, var(--surface-strong, #243652));
  color: #ffffff;
  border-color: color-mix(in srgb, var(--cat-bg, #e8ecf1) 55%, #fff 20%);
  box-shadow: 0 0 0 2px color-mix(in srgb, #fff 18%, transparent);
}
.course-tile-cat.cat-badge {
  color: #0d1b2a;
}
[data-theme="dark"] .course-tile-cat.cat-badge,
[data-bs-theme="dark"] .course-tile-cat.cat-badge {
  color: #f2f6fb;
}
.cat-select-wrap {
  display: block;
  max-width: 420px;
}
.cat-select-wrap .form-select { width: 100%; max-width: 420px; }

/* Admin category style pickers — RGB hex (brand-studio pattern) + visual icon dropdown */
.admin-categories {
  gap: 1rem;
}
.admin-categories-intro {
  padding: 1rem 1.15rem;
}
.admin-cat-create,
.admin-cat-card {
  gap: .85rem;
}
.admin-cat-fields {
  display: grid;
  gap: .85rem 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  align-items: start;
}
.admin-cat-field {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  min-width: 0;
}
.admin-cat-field-label,
.admin-color-field-label,
.admin-icon-field-label {
  font-weight: 650;
  font-size: .88rem;
  color: var(--ink);
}
.admin-color-field,
.admin-icon-field {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  min-width: 0;
}
.admin-color-field-hint {
  font-size: .78rem;
  line-height: 1.35;
}
.admin-color-picker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .65rem .75rem;
  padding: .55rem .7rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--surface-muted) 35%, var(--surface));
}
.admin-color-preview {
  max-width: 14rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.admin-color-controls {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  flex: 1 1 auto;
  min-width: 0;
}
/* Custom color swatch: visible fill + transparent native input overlay (no pseudo-elements). */
.admin-color-swatch,
.brand-color-swatch,
.color-swatch-btn {
  position: relative;
  display: inline-flex;
  flex: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  overflow: hidden;
  cursor: pointer;
}
.admin-color-swatch {
  background: var(--surface);
}
.color-swatch-fill {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  pointer-events: none;
}
.admin-color-swatch input[type="color"],
.brand-color-swatch input[type="color"],
.color-swatch-btn input[type="color"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  opacity: 0;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}
.admin-color-hex {
  width: 6.5rem;
  max-width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .84rem;
  letter-spacing: .02em;
}
.admin-icon-picker {
  position: relative;
  max-width: 22rem;
}
.admin-icon-picker-btn {
  display: flex;
  align-items: center;
  gap: .55rem;
  width: 100%;
  padding: .5rem .65rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--surface-muted) 35%, var(--surface));
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}
.admin-icon-picker-btn:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}
.admin-icon-picker-preview {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  color: var(--accent);
  flex: none;
  font-size: 1.05rem;
}
.admin-icon-picker-text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: .9rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.admin-icon-picker-chev {
  flex: none;
  opacity: .55;
  font-size: .8rem;
}
.admin-icon-picker-menu {
  position: absolute;
  z-index: 40;
  top: calc(100% + .35rem);
  left: 0;
  right: 0;
  max-height: 16rem;
  overflow: auto;
  padding: .35rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: 0 12px 32px color-mix(in srgb, var(--ink) 14%, transparent);
}
.admin-icon-picker-option {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: .55rem .65rem;
  width: 100%;
  padding: .45rem .55rem;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}
.admin-icon-picker-option:hover,
.admin-icon-picker-option.is-selected {
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
}
.admin-icon-picker-option-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 8px;
  background: color-mix(in srgb, var(--ink) 5%, var(--surface));
  font-size: 1rem;
}
.admin-icon-picker-option-label {
  font-size: .88rem;
  font-weight: 600;
}
.admin-icon-picker-option-code {
  font-size: .72rem;
}
.admin-cat-badge-preview {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
}
.cat-badge > .bi,
.cat-chip > .bi {
  flex: none;
}
.admin-cat-card {
  gap: .85rem;
}
.admin-cat-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .65rem;
}
.admin-cat-key {
  font-size: .82rem;
}
.admin-cat-label-field {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  max-width: 420px;
}
.admin-cat-edit {
  gap: .85rem;
  padding-top: .75rem;
  border-top: 1px solid var(--line);
}
.admin-cat-edit-actions {
  padding-top: .1rem;
}
.admin-cat-delete {
  gap: .55rem;
  padding-top: .65rem;
  border-top: 1px dashed var(--line);
}

/* Compact admin tab strip — every tab has an icon */
.admin-page-head .display {
  margin-bottom: .55rem;
}
.admin-shell { display: flex; flex-direction: column; gap: 0; }
.admin-page-head-text { margin-bottom: .65rem; }
.admin-nav {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  width: 100%;
  padding: .2rem 0 .45rem;
  margin: 0 0 .85rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
}
.admin-nav-group {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  min-width: 0;
}
.admin-nav-group--overview .admin-tab { font-weight: 700; }
.admin-nav-group-label {
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.admin-nav-group-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: .3rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  padding-bottom: .1rem;
}
.admin-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: .3rem;
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding: .15rem 0 .35rem;
  margin: 0;
  border-bottom: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.admin-tab {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  flex: 0 0 auto;
  min-height: 2rem;
  padding: .32rem .7rem;
  border: 1px solid transparent;
  border-radius: var(--radius-chip);
  color: var(--ink-soft);
  font-size: .82rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  background: transparent;
}
.admin-tab i {
  font-size: .92rem;
  opacity: .85;
}
.admin-tab:hover {
  color: var(--ink);
  background: var(--surface-muted);
  text-decoration: none;
}
.admin-tab.is-active {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 28%, var(--line));
}
.admin-tab .nav-badge,
.admin-tab em.nav-badge {
  font-style: normal;
  margin-left: .15rem;
}
.admin-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: .75rem;
  margin-bottom: 1rem;
}
a.admin-kpi {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding: 1rem 1.1rem;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s ease, transform .15s ease;
}
a.admin-kpi:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  transform: translateY(-1px);
  text-decoration: none;
  color: inherit;
}
.admin-kpi-label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.admin-kpi-value {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent-strong, var(--accent));
  font-variant-numeric: tabular-nums;
}
.admin-kpi-hint { font-size: .78rem; }
.admin-step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .45rem;
}
.admin-step-list a {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-weight: 600;
}
.admin-quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1rem;
}
.admin-users-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  padding: .85rem 1rem;
  margin-bottom: .85rem;
}
.admin-filter-field { margin: 0; min-width: 140px; }
.admin-filter-field.grow { flex: 1 1 200px; }
.admin-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  align-items: center;
  flex: 1 1 auto;
}
.admin-status-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}
.admin-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  margin: 1rem 0 .5rem;
}
.admin-invoice-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  justify-content: flex-end;
}
.user-admin-card { padding: 0; overflow: hidden; }
.user-admin-card > summary.user-admin-summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.15rem;
  display: block;
}
.user-admin-card > summary.user-admin-summary::-webkit-details-marker { display: none; }
.user-admin-card > summary.user-admin-summary::after {
  content: "";
  float: right;
  width: .65rem;
  height: .65rem;
  margin-top: .55rem;
  border-right: 2px solid var(--ink-soft);
  border-bottom: 2px solid var(--ink-soft);
  transform: rotate(45deg);
  transition: transform .15s ease;
}
.user-admin-card[open] > summary.user-admin-summary::after {
  transform: rotate(-135deg);
  margin-top: .85rem;
}
.user-admin-body {
  padding: 0 1.15rem 1.15rem;
  border-top: 1px solid var(--line);
}
.log-message {
  white-space: normal;
  word-break: break-word;
  max-width: 42rem;
}
.admin-dev-fold {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: .55rem .85rem;
  margin-top: .5rem;
}
.admin-dev-fold > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink-soft);
}
@media (prefers-reduced-motion: reduce) {
  a.admin-kpi, .user-admin-card > summary.user-admin-summary::after {
    transition: none;
  }
}
@media (max-width: 720px) {
  .admin-nav { position: static; }
  .admin-kpi-value { font-size: 1.45rem; }
}
.course-hero-v3-kicker .cat-badge {
  text-transform: none;
  letter-spacing: .02em;
  font-size: .78rem;
  vertical-align: middle;
}

.course-card-bs {
  overflow: hidden;
  transition: transform .15s ease, box-shadow .15s ease;
  color: inherit;
  background: var(--surface);
}
.course-card-bs:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2) !important;
  text-decoration: none;
}
.course-card-bs .course-card-cover {
  height: 160px;
  border-bottom: 1px solid var(--line);
}
.course-card-bs {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
}
.course-cat {
  display: inline-block; width: fit-content;
  font-size: .72rem; font-weight: 700; letter-spacing: .03em;
  text-transform: uppercase; color: var(--accent);
}

.page-head .nav-tabs {
  border-bottom: 1px solid var(--line);
  width: 100%;
  margin-top: .75rem;
}
.page-head .nav-tabs .nav-link {
  color: var(--ink-soft);
  border: 1px solid transparent;
  border-radius: 8px 8px 0 0;
  font-weight: 600;
  background: transparent;
}
.page-head .nav-tabs .nav-link:hover {
  color: var(--ink);
  border-color: var(--line);
  background: var(--surface-muted);
}
.page-head .nav-tabs .nav-link.active {
  color: var(--accent);
  background: var(--surface);
  border-color: var(--line) var(--line) var(--surface);
}

.form-hint {
  margin: .2rem 0 0;
  color: var(--ink-faint);
  font-size: .82rem;
  font-weight: 400;
  line-height: 1.45;
  width: 100%;
  max-width: none;
  display: block;
  box-sizing: border-box;
}
.cover-field { display: flex; flex-direction: column; gap: .5rem; }
.form-control, .form-select {
  border-color: var(--line);
  color: var(--ink);
}
.form-control {
  background-color: var(--surface);
}
.form-select {
  background-color: var(--surface);
}
.form-control:focus, .form-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}
.card {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
}
.dropdown-menu {
  background: var(--surface);
  border-color: var(--line);
  box-shadow: var(--shadow-2);
}
.dropdown-item { color: var(--ink); }
.dropdown-item:hover, .dropdown-item:focus { background: var(--surface-muted); color: var(--ink); }
.dropdown-item.active { background: var(--accent-soft); color: var(--accent); }
.alert { border-radius: var(--radius-md); }

/* Restore Bootstrap grid when gutter utilities are used */
.row[class*="g-"] {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0;
  --bs-gutter-x: 1rem;
  --bs-gutter-y: 1rem;
  margin-top: calc(-1 * var(--bs-gutter-y));
  margin-right: calc(-0.5 * var(--bs-gutter-x));
  margin-left: calc(-0.5 * var(--bs-gutter-x));
}
.row[class*="g-"] > * {
  flex-shrink: 0;
  width: 100%;
  max-width: 100%;
  padding-right: calc(var(--bs-gutter-x) * 0.5);
  padding-left: calc(var(--bs-gutter-x) * 0.5);
  margin-top: var(--bs-gutter-y);
}
.row.g-3 { --bs-gutter-x: 1rem; --bs-gutter-y: 1rem; }
@media (min-width: 576px) {
  .col-sm-6 { flex: 0 0 auto; width: 50%; }
}
@media (min-width: 992px) {
  .col-lg-4 { flex: 0 0 auto; width: 33.33333333%; }
  .col-lg-6 { flex: 0 0 auto; width: 50%; }
}



/* softer Bootstrap alignment */
.form-control, .form-select {
  border-radius: var(--radius-sm) !important;
}
.card, .dropdown-menu, .modal-content, .alert {
  border-radius: var(--radius-md) !important;
}
.btn.dropdown-toggle { border-radius: var(--radius-sm); }
.page-head .nav-tabs {
  gap: .35rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: .15rem;
}
.page-head .nav-tabs .nav-link {
  border-radius: var(--radius-chip) !important;
  margin-bottom: 0;
  padding: .35rem .75rem;
  border: 1px solid transparent !important;
}
.page-head .nav-tabs .nav-link.active {
  border-color: color-mix(in srgb, var(--accent) 30%, var(--line)) !important;
  background: var(--accent-soft) !important;
  color: var(--accent) !important;
}
.activity-tile { border-radius: var(--radius-md); }



/* brand mark */
.brand-mark-wrap{
  width:36px;height:36px;flex:none;display:grid;place-items:center;
  border-radius:11px;overflow:hidden;
}
.brand-logo{
  width:36px;height:36px;object-fit:contain;border-radius:0;display:block;
}

/* course page v2 */
.course-hero-v2{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  margin-bottom:1.35rem;
}
.course-hero-cover{
  height:clamp(160px,28vw,260px);
  background-size:cover;
  background-position:center;
  background-color:var(--surface-muted);
  border-bottom:1px solid var(--line);
}
.course-hero-body{padding:1.35rem 1.5rem 1.5rem;}
.course-hero-badges{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:.7rem;}
.course-desc{margin:.65rem 0 0;max-width:70ch;color:var(--ink-soft);}
.course-desc.prose p{margin:0 0 .45rem;}
.course-desc.prose p:last-child{margin-bottom:0;}
.course-meta{display:flex;flex-wrap:wrap;gap:.75rem 1.1rem;margin-top:.9rem;color:var(--ink-soft);font-size:.9rem;}
.course-meta i{margin-right:.25rem;opacity:.85;}
.course-progress{height:10px;margin-top:1rem;max-width:420px;background:var(--surface-strong);border-radius:999px;}
.course-progress .progress-bar{background:var(--accent);border-radius:999px;}
.course-layout-v2{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(260px, var(--course-settings-w));
  gap:1.25rem;
  align-items:start;
  width:100%;
}
.course-page-edit .course-layout-v2{
  grid-template-columns:minmax(0,1fr) minmax(280px, 340px);
  gap:1.25rem;
}
.curriculum-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:1rem;
  margin-bottom:.85rem;
}
.outline-level-chip{
  display:inline-flex;align-items:center;justify-content:center;
  flex:none;align-self:center;
  min-height:1.35rem;padding:.12rem .45rem;
  border-radius:var(--radius-chip);border:1px solid transparent;
  font-family:var(--font);font-size:.68rem;font-weight:700;
  letter-spacing:.04em;text-transform:uppercase;line-height:1;
  white-space:nowrap;
}
.outline-level-chip--module{
  color:var(--brand-navy-2,#1B3A5E);
  background:color-mix(in srgb, var(--brand-navy-2,#1B3A5E) 10%, var(--surface));
  border-color:color-mix(in srgb, var(--brand-navy-2,#1B3A5E) 22%, var(--line));
}
.outline-level-chip--topic{
  color:var(--accent);
  background:var(--accent-soft);
  border-color:color-mix(in srgb, var(--accent) 28%, var(--line));
}
.outline-level-chip--chapter{
  color:var(--brand-teal,#18B0B8);
  background:color-mix(in srgb, var(--brand-teal,#18B0B8) 12%, var(--surface));
  border-color:color-mix(in srgb, var(--brand-teal,#18B0B8) 30%, var(--line));
}
.module-title-wrap .outline-level-chip{margin-bottom:.15rem;justify-self:start;}
.topic-block{
  margin:.95rem 0 1.05rem;
  padding:.75rem .8rem .85rem;
  border:1px solid color-mix(in srgb, var(--accent) 18%, var(--line));
  border-left:4px solid var(--accent);
  background:color-mix(in srgb, var(--accent-soft) 55%, var(--surface));
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}
.topic-block--solo-same{
  border-left-color:var(--brand-teal,#18B0B8);
}
.topic-lesson-link{
  display:flex;align-items:center;gap:.55rem;flex-wrap:wrap;
  text-decoration:none;color:inherit;
  padding:.55rem .65rem;margin:0 0 .35rem;
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--surface);
  transition:border-color .15s ease, background .15s ease;
}
.topic-lesson-link:hover{
  border-color:color-mix(in srgb, var(--accent) 35%, var(--line));
  background:color-mix(in srgb, var(--accent-soft) 40%, var(--surface));
}
.topic-lesson-link .topic-heading{flex:1 1 12rem;margin:0;}
.topic-lesson-link .topic-lesson-cta{margin-left:auto;}
.topic-lesson-link.is-done{opacity:.88;}
.topic-heading-row{
  display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;
  margin:0 0 .55rem;
}
.topic-heading{
  margin:0;
  font-size:1rem;
  font-weight:700;
  line-height:1.35;
  color:var(--ink);
}
.topic-edit-row,
.outline-row.topic-edit-row{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:.45rem .55rem;
  align-items:center;
  margin-bottom:.55rem;
}
.topic-edit-row > .outline-level-chip{grid-column:1;}
.topic-edit-row > .outline-rename{grid-column:2;min-width:0;}
.topic-edit-row > .outline-row__actions{grid-column:3;}
.topic-edit-row .outline-title-text{font-weight:700;font-size:.95rem;}
.progress-topic{margin:0 0 1rem;}
.progress-topic-title{
  margin:.35rem 0 .55rem;
  font-size:1rem;
  font-weight:650;
}
.outline-rename{
  display:flex;gap:.5rem;min-width:0;align-items:center;
}
.chapter-row-edit > .outline-rename,
.outline-row.chapter-row-edit > .outline-rename{grid-column:3;min-width:0;}
.outline-rename .form-control{
  min-height:36px;flex:1;min-width:0;width:100%;
}
.outline-title-text{
  display:block;min-width:0;width:100%;
  font-family:var(--font);font-size:.95rem;font-weight:600;line-height:1.35;
  color:var(--ink);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.outline-row__actions,
.outline-actions-cluster{
  display:flex;align-items:center;gap:.3rem;
  flex-shrink:0;justify-self:end;
}
.chapter-row-edit > .outline-row__actions,
.outline-row.chapter-row-edit > .outline-row__actions{grid-column:4;}
.outline-confirm-tools{
  display:inline-flex;align-items:center;gap:.25rem;flex:none;
}
.outline-confirm-tools[hidden],
[data-outline-input][hidden],
[data-outline-edit][hidden],
[data-outline-view][hidden]{display:none !important;}
.outline-rename.is-editing .outline-title-text,
.outline-rename.is-editing .module-title,
.outline-row.is-editing [data-outline-view]{display:none;}
.outline-rename:not(.is-editing) [data-outline-input]{display:none !important;}
.outline-rename.is-editing [data-outline-input]{
  display:block;flex:1 1 auto;min-width:0;width:auto;max-width:none;
}
.module-head--edit.is-editing{
  outline:1px solid color-mix(in srgb, var(--warn) 40%, transparent);
  outline-offset:2px;
  border-radius:var(--radius-sm);
}
.chapter-list li.outline-row,
.chapter-list li.chapter-row-edit{
  display:grid;
  grid-template-columns:auto auto minmax(0,1fr) auto;
  align-items:center;
  gap:.45rem .55rem;
}
.chapter-row-edit,
.outline-row.chapter-row-edit{
  padding:.5rem .6rem;margin:0 0 .4rem;
  border:1px solid color-mix(in srgb, var(--brand-teal,#18B0B8) 22%, var(--line));
  border-radius:var(--radius-sm);
  background:var(--surface);
}
.chapter-row-edit > .outline-level-chip,
.outline-row.chapter-row-edit > .outline-level-chip{grid-column:1;flex:none;}
.chapter-row-edit > .ch-mark,
.outline-row.chapter-row-edit > .ch-mark{grid-column:2;flex:none;}
.chapter-row-edit.is-editing,
.outline-row.is-editing.chapter-row-edit{
  border-color:color-mix(in srgb, var(--brand-teal, #18B0B8) 45%, var(--line));
  background:color-mix(in srgb, var(--brand-teal, #18B0B8) 6%, var(--surface));
}
.topic-edit-row.is-editing{
  outline:1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  outline-offset:2px;
  border-radius:var(--radius-sm);
}
.chapter-open-link{flex:none;}
.chapter-open-link .bi{font-size:1rem;line-height:1;}
.chapter-link .outline-level-chip{margin-right:.1rem;}
.chapter-link--under-topic{
  margin-left:.15rem;
  border:1px solid color-mix(in srgb, var(--brand-teal,#18B0B8) 24%, var(--line));
  background:var(--surface);
}
.chapter-link--under-topic .ch-title{font-weight:600;color:var(--accent);}
@media (max-width:640px){
  .topic-edit-row,
  .outline-row.topic-edit-row,
  .chapter-list li.outline-row,
  .chapter-list li.chapter-row-edit{
    grid-template-columns:auto minmax(0,1fr);
  }
  .topic-edit-row > .outline-level-chip{grid-column:1;grid-row:1;}
  .topic-edit-row > .outline-rename{grid-column:2;grid-row:1;}
  .chapter-row-edit > .outline-level-chip{grid-column:1;grid-row:1;}
  .chapter-row-edit > .ch-mark{grid-column:2;grid-row:1;justify-self:end;}
  .chapter-row-edit > .outline-rename{grid-column:1 / -1;grid-row:2;}
  .chapter-row-edit > .outline-row__actions,
  .topic-edit-row > .outline-row__actions{
    grid-column:1 / -1;grid-row:3;justify-self:start;flex-wrap:wrap;
  }
}
.add-inline{
  display:flex;gap:.55rem;align-items:center;flex-wrap:wrap;
  margin-top:.75rem;
}
.add-inline .form-control{
  flex:1 1 auto;min-width:160px;width:auto;max-width:100%;
}
.add-inline .btn{flex:0 0 auto;}
.add-row{
  display:flex;flex-wrap:nowrap;gap:.5rem;align-items:center;
  margin-top:.7rem;min-width:0;
}
.add-row input{
  flex:1 1 auto;min-width:0;width:auto;max-width:none;
}
.add-row .btn,.add-row .icon-btn{flex:0 0 auto;}
.settings-status{
  display:flex;flex-direction:column;gap:.45rem;margin-bottom:.15rem;
}
.settings-status-tags{display:flex;flex-wrap:wrap;gap:.35rem;align-items:center;}
.settings-block{
  padding:.85rem 0;
  border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:.7rem;
}
.settings-block:first-of-type{border-top:none;padding-top:0;}
.settings-block-title{
  margin:.35rem 0 0;font-size:.75rem;font-weight:700;letter-spacing:.02em;
  text-transform:none;color:var(--ink-faint);
}
.settings-acc{
  margin:0;
  border:1px solid color-mix(in srgb, var(--line) 88%, transparent);
  border-radius:12px;
  background:color-mix(in srgb, var(--surface-muted) 55%, var(--surface));
  overflow:hidden;
}
.settings-acc + .settings-acc{margin-top:.45rem;}
.settings-acc[open]{
  border-color:color-mix(in srgb, var(--accent) 28%, var(--line));
  background:var(--surface);
}
.settings-acc-sum{
  list-style:none;cursor:pointer;user-select:none;
  display:flex;align-items:center;gap:.45rem;flex-wrap:wrap;
  min-height:2.5rem;padding:.55rem .75rem;
  font-weight:700;font-size:.9rem;color:var(--ink);
}
.settings-acc-sum::-webkit-details-marker{display:none;}
.settings-acc-chev{
  display:inline-grid;place-items:center;width:1.1rem;flex:none;
  color:var(--accent);transition:transform .15s ease;
}
.settings-acc[open] .settings-acc-chev{transform:rotate(90deg);}
.settings-acc-title{flex:1 1 auto;min-width:0;}
.settings-acc-body{
  display:flex;flex-direction:column;gap:.7rem;
  padding:.15rem .75rem .85rem;
  border-top:1px solid color-mix(in srgb, var(--line) 80%, transparent);
}
.settings-mod-actions{display:grid;gap:.55rem;}
.settings-mod-btns{display:flex;flex-wrap:wrap;gap:.45rem;}
.settings-cover{display:flex;flex-direction:column;gap:.55rem;}
.settings-acc-danger{
  margin-top:.75rem;
  border-color:color-mix(in srgb, var(--danger) 22%, var(--line));
  background:color-mix(in srgb, var(--danger-soft) 35%, var(--surface));
}
.settings-acc-danger[open]{border-color:color-mix(in srgb, var(--danger) 40%, var(--line));}
.settings-form .form-hint{margin:-.25rem 0 0;width:100%;}
.course-settings .settings-acc-body > label.check,
.course-settings .settings-acc-body > .form-hint,
.course-settings .settings-acc-body > .settings-block-title {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}
.course-settings label.check {
  display: flex;
  align-items: flex-start;
  gap: .55rem;
  width: 100%;
  max-width: 100%;
  white-space: normal;
  line-height: 1.4;
}
.course-settings label.check input {
  flex: none;
  margin-top: .2rem;
}
.course-settings .form-grid-2 {
  width: 100%;
  min-width: 0;
}
.course-settings .form-grid-2 > label {
  min-width: 0;
  max-width: 100%;
}
.course-settings select.form-select,
.course-settings .form-select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.2L8 10.2L12 6.2' stroke='%231B3A5E' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-position:right .85rem center;
  background-size:16px 16px;
  background-repeat:no-repeat;
  padding-right:2.55rem;
}
.course-settings .section-title{display:flex;align-items:center;gap:.4rem;}
.course-settings .cover-preview{
  width:100%;max-height:140px;object-fit:cover;border-radius:var(--radius-sm);
  border:1px solid var(--line);
}
.modules .module{
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-1);
}
.chapter-list li{border-radius:var(--radius-sm);}
.chapter-link{border-radius:var(--radius-sm);padding:.55rem .65rem;}
@media (max-width:980px){
  .course-layout-v2,.course-page-edit .course-layout-v2{grid-template-columns:1fr;}
  .course-page-v3 .course-settings{position:static;}
  .editor-modal-panel{width:100%;max-height:94vh;}
}


/* rich text editor — компактная панель Просвет */
.rich-editor{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:var(--surface);
  /* overflow:hidden ломает position:sticky у панели */
  overflow:visible;
  box-shadow:var(--shadow-1);
  isolation:isolate;
}
.rich-sticky-sentinel{
  position:absolute;top:0;left:0;width:1px;height:1px;pointer-events:none;opacity:0;
}
.rich-editor.is-page-canvas{
  border-color:color-mix(in srgb, var(--brand-teal) 35%, var(--line));
  box-shadow:0 0 0 1px color-mix(in srgb, var(--brand-teal) 12%, transparent), var(--shadow-1);
}
/* Hidden but always included in form submit (avoid attribute [hidden] edge-cases) */
.rich-source.visually-hidden,
.visually-hidden{
  position:absolute!important;
  width:1px!important;height:1px!important;
  padding:0!important;margin:-1px!important;
  overflow:hidden!important;clip:rect(0,0,0,0)!important;
  white-space:nowrap!important;border:0!important;
}
.rich-toolbar{
  display:flex;flex-direction:column;gap:0;
  padding:.28rem .35rem;
  border-bottom:1px solid var(--line);
  border-radius:var(--radius-md) var(--radius-md) 0 0;
  /* непрозрачный фон: контент не просвечивает при sticky */
  background:var(--surface);
  background-image:linear-gradient(180deg, color-mix(in srgb, var(--surface-muted) 88%, var(--surface)), var(--surface));
  position:sticky;top:var(--rich-sticky-top, 0px);z-index:40;
  transition:box-shadow .18s ease;
}
.rich-toolbar.is-stuck{
  box-shadow:0 6px 18px rgba(13, 27, 42, .1);
  border-bottom-color:color-mix(in srgb, var(--accent) 28%, var(--line));
}
.rich-toolbar.is-past{
  /* блок проскроллен — панель не должна «залипать» поверх чужого контента */
  position:relative;top:auto;box-shadow:none;
}
@media (max-width: 991.98px) {
  body.has-shell .rich-toolbar { top: max(3.6rem, var(--rich-sticky-top, 0px)); }
}
.rich-toolbar--compact{padding:.28rem .35rem;}
.rich-toolbar--ribbon{padding:.28rem .35rem;}
.rich-author-bar{
  display:flex;align-items:center;gap:.3rem;margin-bottom:.28rem;min-height:0;
}
.rich-style-label{margin:0;display:block;}
.rich-block-style,.rich-bubble-style{
  min-height:30px;height:30px;border:1px solid var(--line);border-radius:7px;
  background:var(--surface);color:var(--ink);font:inherit;font-size:.8rem;font-weight:650;
  padding:.15rem 1.6rem .15rem .55rem;cursor:pointer;
}
.rich-block-style{min-width:8.5rem;}
.rich-author-action{
  min-height:30px;padding:.2rem .55rem;border:1px solid var(--line);border-radius:7px;
  display:inline-flex;align-items:center;justify-content:center;gap:.3rem;
  background:var(--surface);color:var(--ink-soft);font:inherit;font-size:.75rem;font-weight:650;
  cursor:pointer;
}
.rich-author-action:hover,.rich-author-action:focus-visible{color:var(--accent);border-color:var(--accent);outline:none;}
.rich-author-spacer{flex:1 1 auto;}
.rich-author-save{background:var(--accent);border-color:var(--accent);color:#fff;}
.rich-author-save:hover,.rich-author-save:focus-visible{color:#fff;background:var(--accent-strong);}
.rich-ribbon{
  display:flex;flex-direction:column;
  border:1px solid var(--line);
  border-radius:8px;
  background:var(--surface);
  overflow:visible;
  box-shadow:inset 0 1px 0 color-mix(in srgb, #fff 65%, transparent);
}
.rich-ribbon-row{
  display:flex;flex-wrap:nowrap;align-items:center;
}
.rich-ribbon-row--home{
  background:linear-gradient(180deg, color-mix(in srgb, var(--surface-muted) 70%, var(--surface)), var(--surface));
  overflow-x:auto;
  overflow-y:hidden;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
}
.rich-ribbon-row--context{
  border-top:1px solid color-mix(in srgb, var(--brand-teal, var(--accent)) 30%, var(--line));
  background:linear-gradient(90deg, color-mix(in srgb, var(--brand-teal, var(--accent)) 7%, var(--surface)), var(--surface));
  flex-wrap:wrap;
}
.rich-ribbon-row--context[hidden]{display:none!important;}
.rich-more{display:none;position:relative;align-self:center;margin:.2rem;}
.rich-more summary{
  min-height:30px;display:flex;align-items:center;padding:.2rem .55rem;border:1px solid var(--line);
  border-radius:7px;background:var(--surface);color:var(--ink-soft);font-size:.75rem;font-weight:650;cursor:pointer;
}
.rich-more summary::marker{content:"";}
.rich-more-menu{
  position:absolute;right:0;top:calc(100% + 5px);z-index:45;
  display:grid;grid-template-columns:repeat(4,30px);gap:2px;padding:.35rem;
  border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow-2);
}
.rich-more-menu.has-rare{width:min(340px,calc(100vw - 2rem));}
.rich-more-menu .rich-ribbon-rare{
  grid-column:1/-1;border:0;padding:0 0 .3rem;margin-bottom:.2rem;min-height:0;
  border-bottom:1px solid var(--line);
}
.rich-more-menu .rich-ribbon-rare .rich-ribbon-label{display:none;}
.rich-ribbon-group{
  display:flex;flex-direction:row;align-items:center;justify-content:center;
  flex:0 0 auto;
  padding:.2rem .35rem;
  border-right:1px solid var(--line);
  min-width:0;
  min-height:0;
}
.rich-ribbon-group:last-child{border-right:none;}
.rich-ribbon-group--history{
  border-left:2px solid var(--brand-teal, var(--accent));
  padding-left:.35rem;
  background:color-mix(in srgb, var(--brand-teal, var(--accent)) 6%, transparent);
}
.rich-ribbon-group--layout{flex:1 1 auto;align-items:stretch;min-height:0;}
.rich-ribbon-label{display:none;}
.rich-ribbon-body{
  display:flex;flex-direction:row;flex-wrap:nowrap;gap:1px;align-items:center;
  flex:0 0 auto;justify-content:center;
}
.rich-ribbon-body--row,
.rich-ribbon-body--col{
  display:flex;flex-direction:row;flex-wrap:nowrap;gap:1px;align-items:center;justify-content:center;
}
.rich-ribbon-body--insert{
  display:flex;flex-direction:row;flex-wrap:nowrap;gap:1px;align-items:center;
}
.rich-ribbon-body--layout{
  display:flex;flex-wrap:wrap;align-items:center;gap:.35rem .55rem;
  width:100%;min-height:0;padding:.15rem 0;
}
.rich-ribbon-font-top,
.rich-ribbon-font-bottom,
.rich-ribbon-para-top,
.rich-ribbon-para-bottom{
  display:flex;flex-wrap:nowrap;align-items:center;gap:1px;
}
.rich-ribbon-sep{
  width:1px;height:18px;margin:0 .22rem;
  background:var(--line);align-self:center;flex:0 0 1px;
}
.rich-font-size{
  width:3rem;min-width:0;height:30px;padding:0 .25rem;margin-right:1px;
  border:1px solid var(--line);border-radius:6px;
  background:var(--surface-muted);color:var(--ink-soft);
  font:inherit;font-size:.76rem;font-weight:600;cursor:pointer;
}
.rich-font-size:focus{outline:none;border-color:var(--accent);color:var(--ink);box-shadow:0 0 0 2px var(--accent-soft);}
.rich-btn-fz{font-size:.72rem;font-weight:700;}
.rich-fz-glyph{
  display:inline-flex;align-items:baseline;line-height:1;font-size:.9rem;
}
.rich-fz-glyph sup,.rich-fz-glyph sub{font-size:.58em;line-height:0;}
.rich-context-block{
  display:inline-flex;align-items:center;gap:1px;
  padding:.1rem .2rem;border-radius:7px;
  background:color-mix(in srgb, var(--surface-muted) 75%, transparent);
}
.rich-context-block[hidden]{display:none!important;}
.rich-context-name{
  font-size:.66rem;font-weight:600;color:var(--ink-faint);
  margin:0 .25rem 0 .1rem;white-space:nowrap;
}
.rich-context-hint{
  margin:0 0 0 auto;font-size:.66rem;line-height:1.3;
}

.rich-btn{
  width:30px;height:30px;padding:0;border:none;border-radius:6px;
  background:transparent;color:var(--ink-soft);cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
  transition:background .12s,color .12s,transform .12s;
  position:relative;
}
.rich-btn:hover{background:var(--surface-muted);color:var(--ink);}
.rich-btn:active,.rich-btn.is-pressed{transform:scale(.92);background:var(--surface-strong);color:var(--accent);}
.rich-btn.is-active{background:var(--accent-soft);color:var(--accent);}
.rich-btn .ui-ico{width:1.1em;height:1.1em;font-size:1rem;}
.rich-btn > .bi,.rich-btn .ui-ico .bi{font-size:1.05rem;line-height:1;}
.rich-color{position:relative;display:inline-flex;}
.rich-color-toggle{flex-direction:column;gap:1px;}
.rich-color-bar{
  display:block;width:16px;height:3px;border-radius:2px;
  background:var(--accent);margin-top:-2px;
}
.rich-color-pop{
  position:fixed;z-index:1300;
  min-width:188px;padding:.65rem .7rem .7rem;
  background:var(--surface);border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow-2);
}
.rich-callout-wrap{position:relative;display:inline-flex;}
.rich-callout-toggle--labeled{
  width:auto!important;min-width:2.1rem;padding:0 .55rem;gap:.35rem;
}
.rich-callout-btn-label{
  font-size:.78rem;font-weight:700;letter-spacing:.01em;color:var(--ink-soft);
}
.rich-callout-toggle--labeled:hover .rich-callout-btn-label,
.rich-callout-toggle--labeled:focus-visible .rich-callout-btn-label{color:var(--accent);}
.rich-callout-menu{
  position:fixed;z-index:1300;
  min-width:12.5rem;padding:.4rem;
  background:var(--surface);border:1px solid var(--line);
  border-radius:10px;box-shadow:var(--shadow-2);
  display:flex;flex-direction:column;gap:2px;
}
.rich-callout-menu[hidden]{display:none!important;}
.rich-callout-hint{
  margin:0 0 .35rem;padding:.35rem .45rem;font-size:.7rem;line-height:1.35;
  color:var(--ink-faint);border-bottom:1px solid var(--line);
}
.rich-callout-menu button{
  display:flex;align-items:center;gap:.45rem;
  border:none;background:transparent;color:var(--ink);
  font:inherit;font-size:.8rem;font-weight:650;
  min-height:32px;padding:.35rem .5rem;border-radius:7px;cursor:pointer;text-align:left;
}
.rich-callout-menu button:hover,.rich-callout-menu button:focus-visible{
  background:var(--surface-muted);color:var(--accent);outline:none;
}
.rich-callout-menu button .bi{font-size:1rem;color:var(--ink-soft);}
.rich-callout-menu button[data-rich-callout="tip"] .bi{color:#0a8a91;}
.rich-callout-menu button[data-rich-callout="note"] .bi{color:#1d5bbf;}
.rich-callout-menu button[data-rich-callout="warning"] .bi{color:#b85c00;}
.rich-callout-menu button[data-rich-callout="interesting"] .bi{color:#5c35c4;}
.rich-color-modes{
  display:flex;gap:.25rem;margin-bottom:.55rem;
  background:var(--surface-muted);border-radius:8px;padding:3px;
}
.rich-color-mode{
  flex:1;border:none;background:transparent;color:var(--ink-soft);
  min-height:30px;font:inherit;font-size:.72rem;font-weight:600;padding:.3rem .35rem;
  border-radius:6px;cursor:pointer;transition:background .12s,color .12s;
}
.rich-color-mode:hover{color:var(--ink);}
.rich-color-mode.is-active{background:var(--surface);color:var(--accent);box-shadow:var(--shadow-1);}
.rich-swatches{display:grid;grid-template-columns:repeat(4,1fr);gap:.35rem;}
.rich-swatch{
  width:30px;height:30px;border-radius:7px;border:1px solid var(--line);
  background:var(--swatch);cursor:pointer;padding:0;
  transition:transform .12s,box-shadow .12s;
}
.rich-swatch:hover,.rich-swatch:focus-visible{
  transform:scale(1.08);box-shadow:0 0 0 2px var(--accent-soft);outline:none;
}
.rich-swatch.is-light{box-shadow:inset 0 0 0 1px rgba(13,27,42,.12);}
.rich-color-clear{
  display:block;width:100%;margin-top:.45rem;border:none;
  background:transparent;color:var(--ink-faint);font:inherit;font-size:.72rem;
  min-height:30px;font-weight:600;padding:.3rem;border-radius:6px;cursor:pointer;text-align:center;
}
.rich-color-clear:hover{background:var(--surface-muted);color:var(--ink);}
.rich-size-presets{
  display:grid;grid-template-columns:repeat(4,1fr);gap:.3rem;
}
.rich-size-presets button{
  border:1px solid var(--line);background:var(--surface-muted);
  min-height:30px;border-radius:6px;padding:.3rem;font:inherit;font-size:.75rem;font-weight:600;
  cursor:pointer;color:var(--ink-soft);
}
.rich-size-presets button:hover{background:var(--surface);color:var(--accent);}
.page-table.tbl-align-left{margin-left:0;margin-right:auto;}
.page-table.tbl-align-center{margin-left:auto;margin-right:auto;}
.page-table.tbl-align-right{margin-left:auto;margin-right:0;}
.page-table.tbl-full{width:100%!important;}
.page-figure.img-w-custom img{width:100%;max-width:100%;height:auto;}
.prose blockquote,.rich-surface blockquote{
  margin:1rem 0;padding:0;border:none;background:transparent;color:var(--ink);border-radius:0;
}
.prose blockquote:not(.callout):not(.term-card),
.rich-surface blockquote:not(.callout):not(.term-card){
  padding:.85rem 1.05rem;border-left:4px solid var(--callout-line);
  background:var(--callout-bg);border-radius:0 12px 12px 0;
}
.prose blockquote.callout,.rich-surface blockquote.callout{
  padding:.9rem 1.05rem .95rem 1rem;
  border-radius:12px;
  border:1px solid transparent;
  box-shadow:0 1px 3px rgba(13,27,42,.04);
}
.prose blockquote.callout-tip,
.rich-surface blockquote.callout-tip{
  border-color:color-mix(in srgb, #18B0B8 28%, var(--line));
  background:color-mix(in srgb, #18B0B8 9%, var(--surface));
}
.prose blockquote.callout-note,
.rich-surface blockquote.callout-note{
  border-color:color-mix(in srgb, #2D6CDF 28%, var(--line));
  background:color-mix(in srgb, #2D6CDF 9%, var(--surface));
}
.prose blockquote.callout-security,
.rich-surface blockquote.callout-security{
  border-color:color-mix(in srgb, #c5221f 30%, var(--line));
  background:color-mix(in srgb, #c5221f 8%, var(--surface));
}
.prose blockquote.callout-interesting,
.rich-surface blockquote.callout-interesting{
  border-color:color-mix(in srgb, #7c4dff 28%, var(--line));
  background:color-mix(in srgb, #7c4dff 8%, var(--surface));
}
.prose blockquote.callout-ai,
.rich-surface blockquote.callout-ai{
  border-color:color-mix(in srgb, #0D9488 28%, var(--line));
  background:linear-gradient(135deg,
    color-mix(in srgb, #18B0B8 7%, var(--surface)),
    color-mix(in srgb, #2D6CDF 7%, var(--surface)));
}
.prose blockquote.callout-warning,
.rich-surface blockquote.callout-warning{
  border-color:color-mix(in srgb, #e37400 32%, var(--line));
  background:color-mix(in srgb, #e37400 9%, var(--surface));
}
.callout-head{
  display:flex;align-items:center;gap:.55rem;margin-bottom:.45rem;
}
.callout-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:1.65rem;height:1.65rem;border-radius:8px;flex:0 0 auto;
  font-size:.95rem;line-height:1;
}
.callout-tip .callout-icon{background:color-mix(in srgb, #18B0B8 18%, transparent);color:#0a8a91;}
.callout-note .callout-icon{background:color-mix(in srgb, #2D6CDF 18%, transparent);color:#1d5bbf;}
.callout-security .callout-icon{background:color-mix(in srgb, #c5221f 16%, transparent);color:#a31b18;}
.callout-interesting .callout-icon{background:color-mix(in srgb, #7c4dff 16%, transparent);color:#5c35c4;}
.callout-ai .callout-icon{background:color-mix(in srgb, #0D9488 16%, transparent);color:#0a7a70;}
.callout-warning .callout-icon{background:color-mix(in srgb, #e37400 16%, transparent);color:#b85c00;}
.callout-label{
  font-weight:700;font-size:.82rem;letter-spacing:.04em;
  text-transform:uppercase;color:var(--ink-soft);
}
.callout-body p{margin:0;line-height:1.55;}
.prose blockquote.term-card,
.rich-surface blockquote.term-card{
  padding:.85rem 1.05rem;border-left:4px solid #1B3A5E;
  background:color-mix(in srgb, #1B3A5E 8%, var(--surface));
  border-radius:0 12px 12px 0;
}
.prose blockquote.callout p:first-child,
.rich-surface blockquote.callout p:first-child,
.prose blockquote.term-card p:first-child,
.rich-surface blockquote.term-card p:first-child{margin-top:0;}
.prose blockquote.callout p:last-child,
.rich-surface blockquote.callout p:last-child,
.prose blockquote.term-card p:last-child,
.rich-surface blockquote.term-card p:last-child{margin-bottom:0;}
.prose pre,.rich-surface pre{
  background:#1b2733;color:#e6edf3;padding:.85rem 1rem;border-radius:var(--radius-sm);
  overflow:auto;font-size:.88rem;
}
.rich-surface{
  padding:1rem 1.15rem 1.35rem;outline:none;min-height:8rem;
  color:var(--ink);line-height:1.6;font-family:var(--font);
  border-radius:0 0 var(--radius-md) var(--radius-md);
  background:
    linear-gradient(90deg, transparent 0, transparent calc(100% - 1px), color-mix(in srgb, var(--line) 55%, transparent) calc(100% - 1px)),
    var(--surface);
}
.rich-editor.is-previewing .rich-surface{
  background:var(--surface-muted);cursor:default;
  box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
}
.rich-outline{
  border-bottom:1px solid var(--line);padding:.75rem;background:var(--surface-muted);
}
.rich-outline[hidden]{display:none!important;}
.rich-outline-head,.rich-a11y-head{display:flex;align-items:center;justify-content:space-between;gap:.75rem;}
.rich-outline-close,.rich-a11y-head button{
  width:30px;height:30px;border:0;border-radius:7px;background:transparent;color:var(--ink-soft);cursor:pointer;
}
.rich-outline-hint{margin:.1rem 0 .65rem;color:var(--ink-faint);font-size:.8rem;}
.rich-outline-insert{
  display:flex;flex-wrap:wrap;align-items:center;gap:.3rem;margin:0 0 .65rem;
}
.rich-outline-insert-label{
  font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-faint);margin-right:.15rem;
}
.rich-outline-insert button{
  display:inline-flex;align-items:center;gap:.3rem;min-height:30px;padding:.2rem .5rem;
  border:1px solid var(--line);border-radius:8px;background:var(--surface);
  color:var(--ink-soft);font:inherit;font-size:.78rem;cursor:pointer;
}
.rich-outline-insert button:hover,.rich-outline-insert button:focus-visible{
  color:var(--accent);border-color:color-mix(in srgb, var(--accent) 35%, var(--line));background:var(--accent-soft);outline:none;
}
.rich-outline-list{list-style:none;margin:0;padding:0;display:grid;gap:.3rem;max-height:22rem;overflow:auto;}
.rich-outline-item{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:0;
  border:1px solid var(--line);border-radius:10px;background:var(--surface);
}
.rich-outline-item.is-dragging{opacity:.55;}
.rich-outline-item.is-drop-target{outline:2px solid var(--accent);outline-offset:1px;}
.rich-outline-handle{
  display:inline-flex;align-items:center;justify-content:center;width:28px;height:100%;min-height:40px;
  color:var(--ink-faint);cursor:grab;user-select:none;
}
.rich-outline-handle:active{cursor:grabbing;}
.rich-outline-nav{
  min-height:40px;padding:.35rem .5rem;border:0;background:transparent;color:var(--ink);
  font:inherit;font-size:.82rem;text-align:left;cursor:pointer;
  display:grid;gap:.15rem;min-width:0;
}
.rich-outline-chip{
  display:inline-flex;align-items:center;gap:.3rem;width:fit-content;
  padding:.05rem .4rem;border-radius:6px;font-size:.7rem;font-weight:700;
  letter-spacing:.02em;text-transform:uppercase;background:var(--surface-muted);color:var(--ink-soft);
}
.rich-outline-chip.is-callout.is-tip{color:#0a8a91;background:color-mix(in srgb, #18B0B8 14%, var(--surface));}
.rich-outline-chip.is-callout.is-note{color:#1d5bbf;background:color-mix(in srgb, #2D6CDF 14%, var(--surface));}
.rich-outline-chip.is-callout.is-warning{color:#b85c00;background:color-mix(in srgb, #e37400 14%, var(--surface));}
.rich-outline-chip.is-callout.is-interesting{color:#5c35c4;background:color-mix(in srgb, #7c4dff 14%, var(--surface));}
.rich-outline-chip.is-heading{color:var(--ink);background:color-mix(in srgb, var(--ink) 8%, var(--surface));}
.rich-outline-chip.is-code{color:var(--ok);background:var(--ok-soft);}
.rich-outline-preview{
  color:var(--ink-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.8rem;
}
.rich-outline-controls{display:flex;align-self:stretch;}
.rich-outline-controls button{
  width:32px;min-height:40px;border:0;border-left:1px solid var(--line);background:transparent;color:var(--ink-soft);cursor:pointer;
}
.rich-outline-controls button.is-danger{color:#b42318;}
.rich-outline-nav:hover,.rich-outline-controls button:hover{color:var(--accent);background:var(--accent-soft);}
.rich-outline-empty{padding:.7rem;color:var(--ink-faint);font-size:.85rem;}
.rich-a11y-report{
  margin:.75rem;border:1px solid #e4a11b;border-radius:10px;padding:.7rem;
  background:color-mix(in srgb, #fff3cd 72%, var(--surface));color:var(--ink);
}
.rich-a11y-report[hidden]{display:none!important;}
.rich-a11y-report ul{margin:.45rem 0 0;padding:0;list-style:none;display:grid;gap:.3rem;}
.rich-a11y-report li button{
  width:100%;min-height:34px;border:0;border-radius:8px;padding:.45rem .6rem;text-align:left;
  background:color-mix(in srgb, #fff 70%, transparent);color:var(--ink);font:inherit;font-size:.82rem;cursor:pointer;
}
.rich-a11y-report li button:hover,.rich-a11y-report li button:focus-visible{outline:2px solid #b7791f;background:#fff;}
.rich-a11y-target{outline:3px solid #e4a11b!important;outline-offset:3px;}
.rich-bubble{
  position:fixed;z-index:80;display:flex;flex-wrap:wrap;align-items:center;gap:1px;
  max-width:min(760px, calc(100vw - 1.5rem));
  padding:3px 4px;border-radius:10px;
  background:var(--surface);
  border:1px solid var(--line);
  box-shadow:0 10px 28px rgba(13, 27, 42, .16), 0 0 0 1px color-mix(in srgb, var(--accent) 10%, transparent);
  animation:rich-bubble-in .14s ease-out;
}
.rich-bubble[hidden]{display:none!important;}
.rich-bubble .rich-btn{width:30px;height:30px;}
.rich-bubble-style{max-width:11.5rem;min-height:30px;height:30px;}
.rich-block-delete{color:#b42318;}
.rich-bubble-sep{
  width:1px;height:18px;margin:0 2px;background:var(--line);flex:0 0 1px;
}
@media (max-width:520px){
  .rich-bubble{max-width:calc(100vw - 1rem);padding:3px 4px;}
  .rich-bubble .rich-btn{width:32px;height:32px;}
  .rich-bubble-sep{margin:0 1px;}
}
@keyframes rich-bubble-in{
  from{opacity:0;transform:translateY(4px) scale(.96);}
  to{opacity:1;transform:none;}
}
@media (prefers-reduced-motion: reduce){
  .rich-bubble{animation:none;}
}
.rich-editor.is-page-canvas .rich-surface{
  min-height:16rem;
  padding:1.1rem 1.2rem 1.75rem;
}
.rich-editor.is-wide .rich-surface{
  min-height:22rem;
  padding:1.35rem 1.6rem 2.2rem;
}
.rich-editor.is-wide .rich-toolbar{
  padding:.4rem .5rem;
}
@media (max-width:720px){
  .rich-ribbon-group{padding:.18rem .28rem;}
  .rich-btn{width:32px;height:32px;}
  .rich-font-size{height:32px;width:3.2rem;}
  .rich-context-hint{margin-left:0;flex-basis:100%;}
  .rich-author-action span{display:none;}
  .rich-author-action{width:32px;padding:0;min-height:32px;}
  .rich-block-style{min-width:7.5rem;}
}
@media (max-width:900px){
  .rich-ribbon-rare{display:none;}
  .rich-more-menu .rich-ribbon-rare{display:flex;}
  .rich-more{display:block;}
  .rich-ribbon-row--home{overflow-x:auto;flex-wrap:nowrap;}
  .rich-ribbon-group{min-height:0;}
}
.rich-surface:empty:before{
  content:attr(data-placeholder);color:var(--ink-faint);pointer-events:none;
}
.rich-surface:focus{box-shadow:inset 0 0 0 2px var(--accent-soft);}
.rich-surface img,.page-canvas-view img,.prose img{
  max-width:100%;height:auto;border-radius:var(--radius-xs);
  border:1px solid var(--line);display:block;margin:.65rem 0;
}
.page-figure{margin:1.35rem 0;clear:both;}
.page-figure.img-align-center{text-align:center;margin-left:auto;margin-right:auto;}
.page-figure img{
  display:block;margin:0 auto;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--surface);
  box-shadow:0 2px 10px rgba(13,27,42,.06);
  cursor:zoom-in;
  transition:box-shadow .15s ease;
}
.page-figure img:hover{box-shadow:0 6px 22px rgba(13,27,42,.12);}
.prose img:not([data-no-lightbox]),
.rich-surface img:not([data-no-lightbox]),
.page-canvas-view img:not([data-no-lightbox]){cursor:zoom-in;}
.page-figure--diagram img{border-color:var(--accent-soft);}
.page-figure--screenshot img{border-color:var(--line);}
.page-figure--module img{border-width:2px;border-color:var(--accent);}
.page-figure--exam img{border-color:#c9a227;}
.page-figure.img-w-25 img{max-width:25%;}
.page-figure.img-w-50 img{max-width:50%;}
.page-figure.img-w-75 img{max-width:75%;}
.page-figure.img-w-100 img{max-width:100%;}
.page-figure.img-float-left{
  float:left;max-width:46%;margin:.15rem 1rem .65rem 0;clear:left;
}
.page-figure.img-float-right{
  float:right;max-width:46%;margin:.15rem 0 .65rem 1rem;clear:right;
}
.page-figure.img-float-left img,
.page-figure.img-float-right img{max-width:100%;}
.prose::after,.rich-surface::after{content:"";display:table;clear:both;}
.page-figure figcaption{
  display:block;
  max-width:52rem;
  margin:.55rem auto 0;
  padding:.45rem .75rem .5rem;
  font-size:.88rem;
  line-height:1.45;
  color:var(--ink-soft);
  text-align:left;
  border-left:3px solid var(--accent);
  background:var(--surface-muted);
  border-radius:0 var(--radius-xs) var(--radius-xs) 0;
}
.page-figure--module figcaption{border-left-color:var(--accent);}
.page-figure--exam figcaption{border-left-color:#c9a227;background:#fffbeb;}
.page-figure--screenshot figcaption{border-left-color:var(--line);}
.page-figure .figure-label{
  display:inline-block;
  margin-right:.35rem;
  padding:.08rem .45rem;
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.03em;
  text-transform:uppercase;
  color:var(--accent);
  background:var(--accent-soft);
  border-radius:var(--radius-xs);
  vertical-align:baseline;
}
.page-figure--exam .figure-label{color:#8a6d12;background:#fef3c7;}
.page-figure--screenshot .figure-label{color:var(--ink-soft);background:var(--surface);}
.page-table,.prose table{
  width:100%;border-collapse:collapse;margin:1rem 0;font-size:.92rem;
}
.page-table th,.page-table td,.prose th,.prose td{
  border:1px solid var(--line);padding:.5rem .65rem;text-align:left;vertical-align:top;
}
.page-table thead th,.prose thead th{
  background:var(--surface-muted);font-weight:700;color:var(--ink-soft);
}
.math-tex{
  display:inline-block;
  vertical-align:middle;
  max-width:100%;
}
.math-tex.math-block{
  display:block;
  margin:1rem 0;
  text-align:center;
  overflow-x:auto;
}
.rich-surface .math-tex{
  cursor:pointer;
  background:var(--surface-muted);
  border:1px dashed var(--line);
  border-radius:var(--radius-sm);
  padding:.12em .4em;
}
.rich-surface .math-tex.math-block{
  padding:.55rem .75rem;
}
.rich-math-picker{
  position:fixed;
  z-index:1200;
  min-width:280px;
  max-width:min(420px, calc(100vw - 24px));
  padding:.85rem 1rem;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-2, 0 8px 28px rgba(0,0,0,.12));
  display:grid;
  gap:.55rem;
}
.rich-math-picker[hidden]{display:none!important;}
.rich-math-picker-title{margin:0;font-weight:700;font-size:.92rem;}
.rich-math-picker textarea{
  width:100%;
  min-height:4.5rem;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.88rem;
  resize:vertical;
}
.rich-math-picker-modes{display:flex;gap:.85rem;flex-wrap:wrap;font-size:.9rem;}
.rich-math-picker-actions{display:flex;gap:.5rem;justify-content:flex-end;}
.page-attach{
  display:flex;align-items:center;gap:.5rem;margin:.85rem 0;padding:.75rem 1rem;
  border:1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
  border-radius:var(--radius-sm);background:var(--callout-bg);
}
.page-video{margin:1rem 0;max-width:100%;}
.page-video .video-frame{max-width:100%;height:auto;}
.page-attach-link{font-weight:600;color:var(--ink);text-decoration:none;}
.page-attach-link:hover{color:var(--accent);}
.page-editor-block{display:grid;gap:.55rem;}
.page-editor-hint{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:.45rem .85rem;
  font-size:.9rem;
}
.page-editor-callout-doc{
  margin:0;font-size:.82rem;line-height:1.45;
  padding:.55rem .7rem;
  border-radius:8px;
  background:color-mix(in srgb, var(--brand-teal, var(--accent)) 7%, var(--surface-muted));
  border:1px solid color-mix(in srgb, var(--brand-teal, var(--accent)) 22%, var(--line));
}
.page-editor-callout-doc code{
  font-size:.78em;padding:.05em .3em;border-radius:4px;
  background:var(--surface);
}
.item-label-box{
  padding:.85rem 1.05rem;border-left:4px solid var(--callout-line);
  background:var(--callout-bg);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--ink);
}
.item-label-title{margin:0 0 .35rem;font-weight:700;color:var(--ink-soft);font-size:.85rem;letter-spacing:.03em;text-transform:uppercase;}
.item-label-box.is-empty{opacity:.55;}
/* section.item-label — только тип блока, без второй рамки */
section.item-label{
  border:none;background:transparent;padding:0;box-shadow:none;
}
.item-edit-link{
  margin-top:.45rem;text-align:right;
  display:flex;justify-content:flex-end;gap:.35rem;
}
.link-resource{display:flex;flex-wrap:wrap;align-items:center;gap:.65rem;margin-top:.75rem;}
.tag.page{background:var(--accent-soft);color:var(--accent);}
.reader-main.is-studio .item{
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:0;
  background:var(--surface);
  box-shadow:var(--shadow-1);
  /* visible: иначе position:sticky у панели редактора не работает */
  overflow:visible;
}
.reader-main.is-studio .item + .item{margin-top:1rem;}
/* Метка уже сама callout — не дублировать полоску у вложенной цитаты */
.item-label-box .prose,
.item-label-box .prose > :first-child{margin-top:0;}
.item-label-box .prose > :last-child{margin-bottom:0;}
.item-label-box .prose blockquote,
.item-label-box blockquote{
  margin:0;padding:0;border:none;background:transparent;border-radius:0;color:inherit;
}
/* модальное окно редактора (описание курса) */
body.modal-open{overflow:hidden;}
.editor-modal{
  position:fixed;inset:0;z-index:1200;
  display:flex;align-items:center;justify-content:center;
  padding:clamp(.75rem,2vw,1.5rem);
}
.editor-modal.hidden{display:none;}
.editor-modal-backdrop{
  position:absolute;inset:0;
  background:rgba(13,27,42,.55);
  backdrop-filter:blur(3px);
}
.editor-modal-panel{
  position:relative;z-index:1;
  width:min(1080px,96vw);
  max-height:min(92vh,900px);
  display:grid;grid-template-rows:auto 1fr auto;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-2);
  overflow:hidden;
}
.editor-modal-header{
  display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;
  padding:1rem 1.15rem;border-bottom:1px solid var(--line);
  background:var(--surface-muted);
}
.editor-modal-header h2{margin:0;font-size:1.1rem;font-weight:700;}
.editor-modal-body{
  padding:1rem 1.15rem 1.25rem;overflow:auto;min-height:0;
}
.editor-modal-footer{
  display:flex;justify-content:flex-end;gap:.55rem;
  padding:.85rem 1.15rem;border-top:1px solid var(--line);
  background:var(--surface-muted);
}

.chapter-help-entry{margin-top:1rem;}
.item-help-fab{
  position:absolute;
  top:.85rem;
  right:.85rem;
  z-index:2;
}
.item-help-btn{
  width:34px;
  height:34px;
  border-radius:999px;
  border:1px solid color-mix(in srgb, var(--teal) 45%, var(--line));
  background:color-mix(in srgb, var(--teal) 12%, var(--surface));
  color:var(--teal);
  box-shadow:none;
}
.item-help-btn:hover{
  background:color-mix(in srgb, var(--teal) 20%, var(--surface));
  color:var(--accent-strong);
  text-decoration:none;
}
.help-dock{
  position:fixed;
  inset:0;
  z-index:1250;
  display:flex;
  justify-content:flex-end;
}
.help-dock.hidden{display:none;}
.help-dock-backdrop{
  position:absolute;
  inset:0;
  background:rgba(13,27,42,.42);
  backdrop-filter:blur(2px);
}
.help-dock-panel{
  position:relative;
  z-index:1;
  width:min(560px, 100vw);
  height:100vh;
  max-height:100vh;
  border-radius:0;
  border-left:1px solid var(--line);
  overflow:auto;
  padding:1.2rem;
}
.help-dock-head,
.help-thread-head,
.help-thread-detail-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:1rem;
}
.help-dock-context{
  margin:.9rem 0 1rem;
  padding:.85rem 1rem;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:linear-gradient(180deg, color-mix(in srgb, var(--accent) 8%, var(--surface)), color-mix(in srgb, var(--teal) 8%, var(--surface)));
}
.help-compose-form,
.help-reply-form,
.help-thread-reply-box{margin-bottom:1rem;}
.help-thread-card{
  padding:1rem 1.05rem;
  background:var(--surface);
}
.help-message-list{
  display:flex;
  flex-direction:column;
  gap:.75rem;
  margin-top:1rem;
}
.help-message{
  padding:.85rem .95rem;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--surface-muted);
}
.help-message-student{
  border-color:color-mix(in srgb, var(--accent) 30%, var(--line));
  background:color-mix(in srgb, var(--accent) 10%, var(--surface));
}
.help-message-teacher{
  border-color:color-mix(in srgb, var(--teal) 35%, var(--line));
  background:color-mix(in srgb, var(--teal) 12%, var(--surface));
}
.help-message-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.75rem;
  margin-bottom:.35rem;
}
.help-message-body > :last-child{margin-bottom:0;}
.help-empty-state{background:var(--surface-muted);}
.help-inbox-filters{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:.65rem .75rem;
  margin-bottom:.85rem;
  padding:.85rem 1rem;
}
.help-inbox-filters > label{
  flex:1 1 160px;
  min-width:0;
  margin:0;
  font-size:.82rem;
  font-weight:600;
  color:var(--ink-soft);
}
.help-inbox-filters > label > select,
.help-inbox-filters > label > input{
  margin-top:.25rem;
  width:100%;
}
.help-inbox-filter-actions{
  flex:0 0 auto;
  align-items:center;
  gap:.4rem;
  padding-bottom:.05rem;
}
.help-inbox-layout{
  display:grid;
  grid-template-columns:minmax(260px, 320px) minmax(0, 1fr);
  gap:.75rem;
  align-items:start;
}
.help-inbox-list{
  display:flex;
  flex-direction:column;
  gap:.45rem;
  max-height:min(70vh, 820px);
  overflow:auto;
}
.help-inbox-card{
  padding:0;
  overflow:hidden;
  border-radius:var(--radius-sm);
  box-shadow:none;
}
.help-inbox-card.is-active{
  border-color:var(--accent);
  box-shadow:inset 3px 0 0 var(--accent);
}
.help-inbox-card-link{
  display:block;
  padding:.7rem .85rem;
  color:inherit;
}
.help-inbox-card-link:hover{text-decoration:none;background:var(--surface-muted);}
.help-inbox-card-head,
.help-thread-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.5rem;
  flex-wrap:wrap;
}
.help-inbox-card h2{
  font-size:.95rem;
  margin:.35rem 0 .2rem;
  font-weight:700;
}
.help-inbox-card-context{
  margin:0 0 .2rem;
  color:var(--ink-soft);
  font-size:.84rem;
}
.help-thread-detail{display:flex;flex-direction:column;gap:.85rem;}
.help-thread-status-actions{gap:.4rem;padding-top:.25rem;border-top:1px solid var(--line);}
.help-inbox-empty{
  padding:2rem 1rem;
  text-align:center;
}
.help-inbox-empty h2{margin:0 0 .35rem;font-size:1.05rem;}

@media (max-width: 980px){
  .help-inbox-layout{grid-template-columns:1fr;}
  .help-inbox-list{max-height:none;}
}
@media (max-width: 720px){
  .help-dock{align-items:flex-end;}
  .help-dock-panel{
    width:100vw;
    height:min(92vh, 100vh);
    border-left:none;
    border-top-left-radius:var(--radius-lg);
    border-top-right-radius:var(--radius-lg);
  }
  .help-inbox-filters > label{flex:1 1 100%;}
  .item-help-fab{top:.6rem;right:.6rem;}
}

/* контекстное меню редактора */
.rich-ctx-menu,.rich-table-picker{
  position:fixed;z-index:1300;
  min-width:210px;padding:.35rem;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  box-shadow:var(--shadow-2);
}
.rich-ctx-menu[hidden],.rich-table-picker[hidden]{display:none;}
.rich-ctx-item{
  display:block;width:100%;text-align:left;
  border:none;background:transparent;
  padding:.45rem .65rem;border-radius:8px;
  font:inherit;font-size:.88rem;font-weight:600;
  color:var(--ink);cursor:pointer;
}
.rich-ctx-item:hover{background:var(--surface-muted);}
.rich-ctx-item.is-danger{color:var(--danger);}
.rich-ctx-sep{border:none;border-top:1px solid var(--line);margin:.25rem 0;}
.rich-table-picker{
  width:220px;padding:.75rem;
  display:grid;gap:.55rem;
}
.rich-table-picker-title{margin:0;font-size:.82rem;font-weight:700;color:var(--ink-soft);}
.rich-table-picker label{
  display:grid;gap:.2rem;font-size:.8rem;font-weight:600;color:var(--ink-faint);
}
.rich-table-picker input{
  min-height:36px;padding:.35rem .55rem;
  border:1px solid var(--line);border-radius:8px;
  font:inherit;color:var(--ink);background:var(--surface);
}
.rich-table-picker-actions{display:flex;justify-content:flex-end;gap:.4rem;margin-top:.15rem;}

.reader { max-width: none; width: 100%; margin-inline: 0; }
.reader:has(.reader-main.is-studio) { max-width: none; width: 100%; }
.reader-main.is-studio { width: 100%; min-width: 0; }
.course-desc.prose strong, .prose strong,
.course-desc.prose b, .prose b { font-weight: 700 !important; }
.course-desc.prose em, .prose em,
.course-desc.prose i, .prose i { font-style: italic !important; }
.course-desc.prose u, .prose u { text-decoration: underline; }
.rich-surface strong, .rich-surface b { font-weight: 700 !important; }
.rich-surface em, .rich-surface i { font-style: italic !important; }
.rich-surface u { text-decoration: underline; }
.form-control-color{max-width:80px;min-height:42px;padding:.25rem;}


/* profile tabs & security */
.profile-tabs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.25rem;
}
.profile-tabs .nav-link{
  display:inline-flex;align-items:center;gap:.35rem;
  min-height:2.25rem;
  border-radius:var(--radius-sm)!important;margin-bottom:.35rem;
}
.profile-tab-lead{font-size:.92rem;line-height:1.45;max-width:52rem}
.profile-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem;align-items:start}
@media(max-width:900px){.profile-grid-2{grid-template-columns:1fr}}
.account-facts{display:grid;gap:.75rem}
.account-facts>div{display:flex;flex-direction:column;gap:.15rem;padding:.55rem 0;border-bottom:1px solid var(--line)}
.account-facts>div:last-child{border-bottom:none}
.totp-setup{display:grid;grid-template-columns:auto 1fr;gap:1.1rem;align-items:start}
@media(max-width:640px){.totp-setup{grid-template-columns:1fr}}
.totp-qr{width:180px;height:180px;background:#fff;padding:.5rem;border-radius:12px;border:1px solid var(--line)}
.totp-steps{margin:0;padding-left:1.1rem}
.totp-actions{
  display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;
}
.totp-actions .btn{min-height:44px}
.totp-enable-form .totp-actions{margin-top:.15rem}
.form-actions{
  display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;margin-top:.15rem;
}
.form-actions .btn,
.form-actions a.btn{flex:0 0 auto;width:auto;min-height:44px}
.profile-form-footer{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.65rem 1rem;margin-top:.35rem;padding-top:.85rem;border-top:1px solid var(--line);
}
.profile-form-footer-main{
  display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;
}
.profile-form-footer .btn,
.profile-form-footer a.btn{
  width:auto;max-width:none;flex:0 0 auto;min-height:42px;
}
.session-card{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.85rem 1rem;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface-muted)}
.text-ok{color:var(--ok)}
.sep{border:none;border-top:1px solid var(--line);margin:.4rem 0}

/* ---- Shell: тёмный сайдбар по гайду ---- */
body.has-shell {
  display: block;
  min-height: 100vh;
}
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
  overflow-x: clip;
}
.app-sidebar {
  background: var(--brand-navy, #0D1B2A);
  color: #e8eef6;
  padding: 1rem .65rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100%;
  max-width: var(--sidebar-w);
  min-width: 0;
  box-sizing: border-box;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-gutter: stable;
}
.app-sidebar-brand {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .35rem .35rem .95rem;
  text-decoration: none;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.08);
  min-width: 0;
}
.app-sidebar-brand:hover { color: #fff; text-decoration: none; }
.app-sidebar-brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  flex: none;
  object-fit: contain;
  background: rgba(255,255,255,.06);
}
.app-sidebar-brand-text {
  min-width: 0;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding-top: .1rem;
}
.app-sidebar-brand .brand-title-main {
  display: block;
  font-weight: 750;
  letter-spacing: -.01em;
  text-transform: none;
  font-size: 1.05rem;
  line-height: 1.2;
  color: #fff;
}
.app-sidebar-brand .brand-title-org {
  display: block;
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  line-height: 1.35;
  color: rgba(232, 238, 246, .82);
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.app-side-nav {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  flex: 1;
  min-width: 0;
}
.app-side-nav a {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .55rem .6rem;
  border-radius: 10px;
  color: rgba(232,238,246,.72);
  font-weight: 600;
  font-size: .86rem;
  text-decoration: none;
  transition: background .15s, color .15s, transform .12s;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}
.app-side-nav a i {
  font-size: 1.15rem;
  width: 1.25rem;
  flex: 0 0 auto;
  text-align: center;
  opacity: .9;
}
.app-side-nav a .nav-label {
  flex: 1 1 auto;
  min-width: 0;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.app-side-nav .nav-badge {
  flex: 0 0 auto;
  white-space: nowrap;
}
.app-side-nav a:hover {
  background: rgba(255,255,255,.06);
  color: #fff;
  text-decoration: none;
}
.app-side-nav a.is-active {
  background: var(--brand-gradient-sidebar-active);
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.08);
}
.guest-banner{
  margin:0;
  padding: .85rem 1rem;
  border: 1px solid color-mix(in srgb, var(--brand-teal, var(--accent)) 32%, var(--line));
  border-radius: var(--radius-md);
  background: linear-gradient(105deg, color-mix(in srgb, var(--brand-teal, var(--accent)) 10%, var(--surface)), var(--surface));
  box-shadow: 0 1px 2px rgba(13,27,42,.04);
}
.guest-banner-compact { padding: .75rem 1rem; }
.guest-banner-ico {
  font-size: 1.25rem;
  color: var(--brand-teal, var(--accent));
  flex: none;
}
/* If a banner is ever nested in .reader, span both columns so the side/main grid stays intact */
.reader > .guest-banner{
  grid-column:1 / -1;
}
.guest-banner-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.85rem 1.25rem;
  flex-wrap:wrap;
}
.guest-banner-text{
  flex:1 1 14rem;
  line-height:1.45;
  margin: 0;
  color: var(--ink-soft);
}
.guest-banner-text b { color: var(--ink); }
.guest-banner-actions{
  display:flex;
  flex-wrap:wrap;
  gap:.45rem;
  flex:0 0 auto;
}
.guest-gate{max-width:32rem;margin-top:.85rem;}
.guest-sidebar-note{
  margin-top:auto;padding:.9rem 1rem;
  border-radius:12px;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.08);
}
.guest-sidebar-note .tag{margin-bottom:.5rem;}
.guest-sidebar-note .muted{color:rgba(232,238,246,.72)!important;line-height:1.4;}

.app-side-nav a .nav-badge {
  margin-left: auto;
  background: var(--brand-action);
  color: #fff;
  font-size: .7rem;
  min-width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 .35rem;
  flex: 0 0 auto;
  line-height: 1;
}
.app-shell-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg);
}
.app-topbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .65rem;
  padding: .55rem 1.15rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 40;
}
.topbar-a11y-btn {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  max-width: min(100%, 320px);
  padding: .45rem .85rem .45rem .65rem;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  border-radius: 999px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 8%, var(--surface)), var(--surface-muted));
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow-1);
  transition: border-color .15s, background .15s, box-shadow .15s, transform .12s;
}
.topbar-a11y-btn:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow-2);
}
.topbar-a11y-btn.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong, var(--accent));
}
.topbar-a11y-icon {
  flex: none;
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
  color: var(--accent);
  font-size: 1.05rem;
}
.topbar-a11y-copy {
  display: flex;
  flex-direction: column;
  gap: .05rem;
  min-width: 0;
  line-height: 1.15;
}
.topbar-a11y-title {
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .01em;
}
.topbar-a11y-sub {
  font-size: .72rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.topbar-a11y-btn.is-active .topbar-a11y-sub { color: color-mix(in srgb, var(--accent) 70%, var(--ink-soft)); }
@media (max-width: 520px) {
  .topbar-a11y-btn {
    padding: .4rem .65rem .4rem .5rem;
    border-radius: var(--radius-md);
  }
  .topbar-a11y-sub { display: none; }
  .topbar-a11y-title { font-size: .76rem; }
  .profile-form-footer {
    flex-direction: column;
    align-items: stretch;
  }
  .profile-form-footer-main,
  .profile-form-footer > .btn,
  .profile-form-footer > a.btn {
    width: 100%;
    justify-content: center;
  }
}
.topbar-tools {
  display: flex;
  align-items: center;
  gap: .45rem;
  flex: none;
}
.topbar-icon-btn {
  position: relative;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: background .15s, color .15s, border-color .15s;
}
.topbar-icon-btn:hover {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  background: var(--surface);
}
.topbar-icon-btn.is-active {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}
.topbar-icon-btn .bi { font-size: 1.05rem; line-height: 1; }
.topbar-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  min-width: 1.05rem;
  height: 1.05rem;
  padding: 0 .2rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: .62rem;
  font-weight: 700;
  line-height: 1.05rem;
  text-align: center;
}
.theme-switch {
  --theme-switch-w: 3.35rem;
  --theme-switch-h: 1.75rem;
  --theme-switch-pad: 2px;
  width: var(--theme-switch-w);
  height: var(--theme-switch-h);
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--line) 80%, #6eb5ff);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  flex: none;
  transition: border-color .25s ease;
}
.theme-switch:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.theme-switch-track {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 999px;
  overflow: hidden;
  background: linear-gradient(180deg, #74b9ff 0%, #a8d4ff 52%, #e8f4ff 100%);
  box-shadow: inset 0 2px 5px rgba(13, 27, 42, .12);
  transition: background .35s ease;
}
.theme-switch.is-dark {
  border-color: color-mix(in srgb, #1b3a5e 70%, #000);
}
.theme-switch.is-dark .theme-switch-track {
  background: linear-gradient(180deg, #243b53 0%, #0d1b2a 100%);
}
.theme-switch-deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  transition: opacity .35s ease;
}
.theme-switch-clouds::before,
.theme-switch-clouds::after {
  content: "";
  position: absolute;
  bottom: 3px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .92);
  box-shadow: 12px 0 0 -2px rgba(255, 255, 255, .75);
}
.theme-switch-clouds::before {
  width: 11px;
  height: 6px;
  right: 10px;
}
.theme-switch-clouds::after {
  width: 8px;
  height: 5px;
  right: 24px;
  opacity: .75;
}
.theme-switch-stars {
  opacity: 0;
  background:
    radial-gradient(circle, #fff 0 1px, transparent 1.5px) 10px 9px / 16px 16px,
    radial-gradient(circle, #fff 0 1px, transparent 1.5px) 22px 14px / 18px 18px,
    radial-gradient(circle, rgba(255,255,255,.75) 0 .8px, transparent 1.2px) 16px 6px / 14px 14px;
}
.theme-switch.is-dark .theme-switch-clouds { opacity: 0; }
.theme-switch.is-dark .theme-switch-stars { opacity: 1; }
.theme-switch-knob {
  position: absolute;
  top: var(--theme-switch-pad);
  left: var(--theme-switch-pad);
  width: calc(var(--theme-switch-h) - var(--theme-switch-pad) * 2);
  height: calc(var(--theme-switch-h) - var(--theme-switch-pad) * 2);
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #fff6a8 0%, #ffc93a 42%, #f5a623 100%);
  box-shadow: 0 2px 5px rgba(13, 27, 42, .22);
  transition: transform .35s cubic-bezier(.4, 0, .2, 1), background .35s ease, box-shadow .35s ease;
}
.theme-switch-knob::after {
  content: "";
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(180, 188, 200, .55);
  top: 42%;
  left: 58%;
  box-shadow: -6px -2px 0 -1px rgba(180, 188, 200, .4), -3px 4px 0 -1.2px rgba(180, 188, 200, .35);
  opacity: 0;
  transition: opacity .2s ease;
}
.theme-switch.is-dark .theme-switch-knob {
  transform: translateX(calc(var(--theme-switch-w) - var(--theme-switch-h)));
  background: radial-gradient(circle at 35% 30%, #fff 0%, #dfe4ef 45%, #b8c0cf 100%);
  box-shadow: 0 2px 6px rgba(0, 0, 0, .35);
}
.theme-switch.is-dark .theme-switch-knob::after { opacity: 1; }
.topbar-user { flex: none; }
.topbar-user-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  height: 38px;
  padding: .2rem .45rem .2rem .22rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--ink);
  font: inherit;
  font-size: .86rem;
  font-weight: 600;
  line-height: 1;
}
.topbar-user-btn:hover,
.topbar-user-btn:focus-visible {
  background: var(--surface);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--line));
  color: var(--ink);
}
.topbar-user-btn.dropdown-toggle::after {
  margin-left: .1rem;
  vertical-align: middle;
}
.topbar-user-name {
  max-width: 7.5rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.app-content {
  flex: 1;
  --app-pad-x: 1.35rem;
  --app-pad-y: 1.1rem;
  padding: var(--app-pad-y) var(--app-pad-x) 1.75rem;
  max-width: min(1280px, 100%);
  width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
}
/* Курс / глава: занимать всю ширину колонки shell — не узкая полоса при zoom out */
body.has-shell .app-content:has(.reader),
body.has-shell .app-content:has(.course-page-v3),
body.has-shell .app-content:has(.course-page) {
  --app-pad-x: clamp(0.85rem, 1.4vw, 1.25rem);
  max-width: none;
  width: 100%;
  margin-inline: 0;
}
.app-content > .alert,
.app-content > .flash {
  margin-bottom: 1rem;
  width: 100%;
  box-sizing: border-box;
}
/* Курс: hero full-bleed (−pad) — flash той же ширины, что и герой */
.app-content:has(.course-page-v3) > .alert,
.app-content:has(.course-page-v3) > .flash,
.app-content:has(.course-page) > .alert,
.app-content:has(.course-page) > .flash {
  margin-left: calc(var(--app-pad-x) * -1) !important;
  margin-right: calc(var(--app-pad-x) * -1) !important;
  margin-top: calc(var(--app-pad-y) * -1) !important;
  margin-bottom: 0 !important;
  width: calc(100% + 2 * var(--app-pad-x)) !important;
  max-width: none !important;
  border-radius: 0 !important;
  border-left: 0 !important;
  border-right: 0 !important;
  padding-left: var(--app-pad-x) !important;
  padding-right: var(--app-pad-x) !important;
  box-sizing: border-box !important;
}
@media (max-width: 991px) {
  body.has-shell .app-content:has(.course-page-v3) > .alert,
  body.has-shell .app-content:has(.course-page-v3) > .flash,
  body.has-shell .app-content:has(.course-page) > .alert,
  body.has-shell .app-content:has(.course-page) > .flash {
    --app-pad-x: 1rem;
    --app-pad-y: 1rem;
  }
}
body.auth-page .app-navbar,
body.auth-page .bottom-nav { display: none !important; }
body.auth-page { background: var(--brand-bg, var(--bg)); }
body.auth-page .page-main,
body.auth-page .app-content { max-width: none; padding: 0; }

@media (max-width: 991px) {
  .app-shell { grid-template-columns: 1fr; }
  .app-sidebar { display: none; }
  body.has-shell .app-navbar-mobile { display: flex !important; }
}
@media (min-width: 992px) {
  body.has-shell .app-navbar-mobile { display: none !important; }
  body.has-shell .bottom-nav { display: none !important; }
}
/* Средние экраны: ещё компактнее chrome, чтобы холст не сжимался */
@media (min-width: 992px) and (max-width: 1280px) {
  :root {
    --sidebar-w: 220px;
    --reader-side-w: 200px;
    --course-settings-w: 300px;
  }
  .reader:has(.reader-main.is-studio) {
    grid-template-columns: minmax(150px, 190px) minmax(0, 1fr);
  }
  .course-page-edit .course-layout-v2 {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 300px);
  }
}

.course-card-bs .course-card-cover {
  background:
    var(--brand-gradient-cover),
    var(--course-cover-default, url("/static/branding/course-cover-default.png")) center / cover;
  background-blend-mode: normal;
  min-height: 140px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.welcome-band {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.4rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-1);
}
.welcome-band h1 { margin: 0 0 .35rem; font-weight: 800; letter-spacing: -.02em; }
.progress-slim {
  height: 8px;
  border-radius: 999px;
  background: var(--surface-muted);
  overflow: hidden;
  margin-top: .65rem;
}
.progress-slim > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--brand-action), var(--brand-teal));
}

/* ========== ПРОСВЕТ courses design v3 ==========
   Signature: diagonal “просвет” light wash (clarity through structure).
   Catalog masthead = brand thesis; course hero = full-bleed cover.
   ============================================= */

.catalog-stack {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  width: 100%;
}
.catalog-masthead {
  position: relative;
  overflow: hidden;
  margin: 0;
  padding: clamp(1.55rem, 3.8vw, 2.55rem) clamp(1.25rem, 3.2vw, 2.15rem);
  border-radius: var(--radius-lg);
  background: var(--brand-gradient-masthead);
  color: #e8eef6;
  isolation: isolate;
  box-shadow: 0 18px 40px color-mix(in srgb, var(--brand-navy) 18%, transparent);
}
.catalog-masthead.catalog-style-compact {
  padding: clamp(1rem, 2.4vw, 1.45rem) clamp(1rem, 2.5vw, 1.65rem);
  border-radius: var(--radius);
}
.catalog-masthead.catalog-style-compact .catalog-brand {
  font-size: clamp(1.45rem, 3.5vw, 2rem);
}
.catalog-masthead.catalog-style-compact .catalog-thesis,
.catalog-masthead.catalog-style-compact .catalog-lead {
  display: none;
}
.catalog-masthead.catalog-style-compact .catalog-masthead-mark {
  width: clamp(56px, 8vw, 72px);
  height: clamp(56px, 8vw, 72px);
  border-radius: 16px;
}
.catalog-masthead.catalog-style-minimal {
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}
.catalog-masthead.catalog-style-minimal .catalog-masthead-wash {
  display: none;
}
.catalog-masthead.catalog-style-minimal .catalog-kicker {
  color: var(--ink-soft);
}
.catalog-masthead.catalog-style-minimal .catalog-brand {
  color: var(--brand-navy, var(--ink));
  font-size: clamp(1.35rem, 3vw, 1.85rem);
}
.catalog-masthead.catalog-style-minimal .catalog-thesis {
  color: var(--ink-soft);
  font-size: .95rem;
}
.catalog-masthead.catalog-style-minimal .catalog-lead {
  color: var(--ink-faint);
  font-size: .88rem;
}
.catalog-masthead.catalog-style-minimal .catalog-masthead-mark {
  background: color-mix(in srgb, var(--brand-action) 8%, var(--surface));
  border-color: var(--line);
}
.catalog-masthead.catalog-style-minimal .catalog-masthead-actions .btn-outline-light {
  color: var(--brand-action);
  border-color: color-mix(in srgb, var(--brand-action) 35%, var(--line));
}
.catalog-masthead.catalog-style-minimal .catalog-masthead-actions .btn-outline-light:hover {
  background: color-mix(in srgb, var(--brand-action) 8%, var(--surface));
  color: var(--brand-action);
}
.catalog-masthead-wash {
  position: absolute;
  inset: -10% -5% auto -15%;
  height: 120%;
  background:
    linear-gradient(125deg,
      transparent 0%,
      color-mix(in srgb, var(--brand-teal) 18%, transparent) 42%,
      color-mix(in srgb, var(--brand-action) 12%, transparent) 68%,
      transparent 92%);
  pointer-events: none;
  z-index: 0;
  opacity: .7;
}
@media (prefers-reduced-motion: no-preference) {
  .catalog-masthead-wash {
    animation: prosvet-wash 18s ease-in-out infinite alternate;
  }
}
@keyframes prosvet-wash {
  from { transform: translate3d(0, 0, 0); opacity: .55; }
  to   { transform: translate3d(1.5%, -1%, 0); opacity: .75; }
}
.catalog-masthead-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.25rem 1.75rem;
  align-items: center;
}
.catalog-masthead-mark {
  width: clamp(72px, 12vw, 112px);
  height: clamp(72px, 12vw, 112px);
  border-radius: 22px;
  display: grid;
  place-items: center;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
}
.catalog-masthead-mark img {
  width: 68%;
  height: 68%;
  object-fit: contain;
}
.catalog-kicker,
.catalog-brand,
.catalog-thesis,
.catalog-lead,
.catalog-masthead-actions {
  position: relative;
  z-index: 1;
}
.catalog-kicker {
  margin: 0 0 .45rem;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: none;
  color: color-mix(in srgb, #fff 62%, var(--brand-teal));
}
.catalog-brand {
  margin: 0;
  font-size: clamp(1.85rem, 4.8vw, 2.75rem);
  font-weight: 750;
  letter-spacing: -.02em;
  text-transform: none;
  line-height: 1.08;
  color: #fff;
}
.catalog-thesis {
  margin: .55rem 0 0;
  font-size: clamp(1rem, 2vw, 1.18rem);
  font-weight: 500;
  letter-spacing: 0;
  color: color-mix(in srgb, #fff 84%, var(--brand-teal));
}
.catalog-lead {
  margin: .7rem 0 0;
  max-width: 38rem;
  font-size: .94rem;
  line-height: 1.5;
  color: color-mix(in srgb, #fff 68%, transparent);
}
.catalog-masthead-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .55rem;
  margin-top: 1.1rem;
}
.btn-ghost-light {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  color: #fff;
}
.btn-ghost-light:hover {
  background: rgba(255,255,255,.14);
  color: #fff;
  border-color: rgba(255,255,255,.28);
  text-decoration: none;
}
.catalog-cta {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  min-height: 42px;
}
.catalog-masthead .btn-primary {
  box-shadow: 0 8px 22px rgba(45, 108, 223, .35);
}
body.is-guest .catalog-masthead-actions .catalog-cta {
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .92rem;
  text-decoration: none;
  white-space: nowrap;
}
body.is-guest .catalog-masthead-actions {
  gap: .55rem .65rem;
}
body.is-guest .guest-banner-actions .btn {
  padding: .85rem 1.35rem;
  border-radius: var(--radius-sm);
}
body.is-guest .guest-banner-actions {
  gap: .55rem;
}
@media (max-width: 640px) {
  .catalog-masthead-grid { grid-template-columns: 1fr; }
  .catalog-masthead-mark { display: none; }
  body.is-guest .catalog-masthead-actions .catalog-cta {
    padding: .9rem 1.25rem;
    flex: 1 1 auto;
    justify-content: center;
    min-width: min(100%, 10rem);
  }
  body.is-guest .guest-banner-actions {
    width: 100%;
  }
  body.is-guest .guest-banner-actions .btn {
    flex: 1 1 auto;
    padding: .75rem 1.15rem;
    justify-content: center;
    min-width: min(100%, 9rem);
  }
}
.catalog-filters { margin: 0; }
.catalog-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .65rem 1rem;
}
.catalog-toolbar .catalog-filters { flex: 1 1 14rem; }
@media (max-width: 640px) {
  .catalog-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .catalog-toolbar .catalog-filters {
    flex: 1 1 auto;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .catalog-toolbar .catalog-search {
    margin-left: 0;
    flex: 1 1 auto;
    width: 100%;
    max-width: none;
  }
}
.catalog-search {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: .35rem;
  margin-left: auto;
  flex: 0 1 17rem;
  max-width: 100%;
}
/* [ input …… ✕ ] [🔍] — submit is a sibling to the right of the field */
.catalog-search-field {
  position: relative;
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  min-width: 0;
  min-height: 2.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 88%, var(--surface-muted));
  box-sizing: border-box;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.catalog-search-field:focus-within {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  background: var(--surface);
  box-shadow: 0 0 0 .15rem color-mix(in srgb, var(--accent-soft) 70%, transparent);
}
.catalog-search-field > input.catalog-search-input.form-control {
  flex: 1 1 auto;
  width: 100% !important;
  min-width: 0 !important;
  min-height: 0 !important;
  height: 2.05rem !important;
  margin: 0 !important;
  /* Room for clear (×) on the right; leading search icon removed (submit has it) */
  padding: .3rem 2rem .3rem .75rem !important;
  border: 0 !important;
  border-radius: inherit !important;
  background: transparent !important;
  box-shadow: none !important;
  font-size: .86rem;
  line-height: 1.25;
  color: var(--ink-soft);
  appearance: none;
  -webkit-appearance: none;
}
.catalog-search-field > input.catalog-search-input.form-control:hover,
.catalog-search-field > input.catalog-search-input.form-control:focus {
  border: 0 !important;
  box-shadow: none !important;
  outline: none;
  color: var(--ink);
  background: transparent !important;
}
.catalog-search-field > input.catalog-search-input.form-control::placeholder {
  color: color-mix(in srgb, var(--ink-soft) 72%, transparent);
}
.catalog-search-field > input.catalog-search-input.form-control::-webkit-search-decoration,
.catalog-search-field > input.catalog-search-input.form-control::-webkit-search-cancel-button,
.catalog-search-field > input.catalog-search-input.form-control::-webkit-search-results-button,
.catalog-search-field > input.catalog-search-input.form-control::-webkit-search-results-decoration {
  -webkit-appearance: none;
  appearance: none;
}
.catalog-search-clear {
  position: absolute;
  top: 50%;
  right: .2rem;
  transform: translateY(-50%);
  z-index: 1;
  flex: none;
  width: 1.55rem;
  height: 1.55rem;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: var(--radius-xs);
  background: transparent;
  color: color-mix(in srgb, var(--ink-soft) 78%, transparent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color .15s, background .15s;
}
.catalog-search-clear:hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--surface-muted) 80%, transparent);
}
.catalog-search-clear:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 1px;
}
.catalog-search-clear .bi {
  font-size: .78rem;
  line-height: 1;
}
.catalog-search-clear[hidden] { display: none !important; }
.catalog-search-submit {
  flex: 0 0 auto;
  align-self: center;
  width: 2.1rem;
  height: 2.1rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 88%, var(--surface-muted));
  color: color-mix(in srgb, var(--ink-soft) 85%, transparent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color .15s, background .15s, border-color .15s;
}
.catalog-search-submit:hover {
  color: var(--ink);
  background: var(--surface);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}
.catalog-search-submit:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 1px;
}
.catalog-search-submit .bi {
  font-size: .9rem;
  line-height: 1;
}

/* High-contrast: field + submit each get a clear outline; no inner double borders */
@media (prefers-contrast: more) {
  .a11y-content-root .catalog-search-field,
  .a11y-content-root .catalog-search-submit {
    border-width: 2px !important;
  }
  .a11y-content-root .catalog-search-field > input.catalog-search-input,
  .a11y-content-root .catalog-search-clear {
    border: 0 !important;
  }
}
html.a11y-high-contrast .a11y-content-root .catalog-search-field,
html.a11y-high-contrast .a11y-content-root .catalog-search-submit {
  border: 2px solid #000 !important;
  background: #fff !important;
  box-shadow: none !important;
  color: #000 !important;
}
html.a11y-high-contrast .a11y-content-root .catalog-search-field > input.catalog-search-input,
html.a11y-high-contrast .a11y-content-root .catalog-search-clear {
  border: 0 !important;
  box-shadow: none !important;
  background: transparent !important;
  color: #000 !important;
}
.catalog-empty {
  text-align: center;
  padding: 1.75rem 1.35rem 1.85rem;
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--brand-navy, var(--ink)) 3.5%, var(--surface)) 0%,
      var(--surface) 55%
    );
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}
.catalog-empty h2 {
  margin: .85rem 0 .4rem;
  font-weight: 700;
  letter-spacing: -.02em;
  font-size: 1.2rem;
  color: var(--ink);
}
.catalog-empty .muted {
  max-width: 32rem;
  margin-inline: auto;
  line-height: 1.5;
}
.catalog-empty .empty-illust {
  max-width: min(220px, 55vw);
  margin-inline: auto;
  opacity: .9;
  border-radius: var(--radius-md);
  filter: saturate(.92);
}

/* Editorial course tiles — cover as visual plane, text below (not overlay stickers) */
.course-grid-v3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: 1.35rem;
}
.course-tile {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  transition: transform .28s cubic-bezier(.2, .8, .2, 1), border-color .2s ease, box-shadow .28s ease;
  animation: tile-in .55s ease both;
  animation-delay: calc(var(--i, 0) * 45ms);
  box-shadow: 0 1px 2px rgba(13, 27, 42, .04);
}
@keyframes tile-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}
.course-tile:hover {
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--cat-accent, var(--accent)) 40%, var(--line));
  box-shadow: 0 18px 42px rgba(13, 27, 42, .12);
  text-decoration: none;
  color: inherit;
}
.course-tile-media {
  position: relative;
  aspect-ratio: 16 / 10;
  background-color: var(--brand-navy);
  background-image: var(--brand-gradient-cover);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.course-tile-media::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-action), var(--cat-accent, var(--brand-teal)));
  opacity: .9;
}
.course-tile-mono {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(2.4rem, 8vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -.04em;
  color: rgba(255,255,255,.88);
  text-shadow: 0 8px 28px rgba(0,0,0,.35);
  z-index: 1;
  pointer-events: none;
}
.course-tile-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(13, 27, 42, .28) 100%);
  opacity: .55;
  transition: opacity .25s ease;
  z-index: 0;
}
.course-tile:hover .course-tile-shade { opacity: .85; }
.course-tile-body {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  padding: 1rem 1.1rem 1.15rem;
  flex: 1;
}
.course-tile-cat {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .02em;
  text-transform: none;
}
.course-tile-cat.cat-badge {
  align-self: flex-start;
}
.course-tile-title {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.25;
  color: var(--ink);
}
.course-tile-desc {
  margin: 0;
  font-size: .88rem;
  color: var(--ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.course-tile-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .4rem;
  margin-top: .35rem;
  padding-top: .7rem;
  border-top: 1px solid var(--line);
  font-size: .78rem;
  color: var(--ink-faint);
  font-weight: 600;
}
.tile-status {
  color: var(--ink-soft);
}
.tile-status.is-ok { color: var(--ok); }
.tile-status.is-wait { color: var(--warn); }

/* Course page — full-bleed hero */
.course-page-v3 {
  margin: calc(var(--app-pad-y, 1.1rem) * -1) calc(var(--app-pad-x, 1.35rem) * -1) 0;
}
.course-hero-v3 {
  position: relative;
  min-height: clamp(248px, 36vw, 360px);
  display: flex;
  align-items: flex-end;
  color: #f2f5f8;
  overflow: hidden;
  isolation: isolate;
}
.course-hero-v3-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-color: var(--brand-navy);
  transform: scale(1.015);
  transition: transform 10s ease;
  z-index: 0;
}
.course-page-v3:hover .course-hero-v3-bg { transform: scale(1.035); }
.course-hero-v3-wash {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(108deg,
      rgba(13, 27, 42, .94) 0%,
      rgba(13, 27, 42, .78) 38%,
      rgba(27, 58, 94, .52) 68%,
      color-mix(in srgb, var(--brand-teal) 16%, transparent) 100%),
    linear-gradient(0deg, rgba(13, 27, 42, .9) 0%, transparent 58%);
}
.course-hero-v3-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(1.65rem, 4vw, 2.65rem) clamp(1.25rem, 3vw, 1.75rem) clamp(1.45rem, 3.2vw, 2rem);
  animation: hero-in .65s cubic-bezier(.2, .8, .2, 1) both;
  border-top: 1px solid color-mix(in srgb, #fff 10%, transparent);
}
@keyframes hero-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}
.course-hero-v3-kicker {
  margin: 0 0 .7rem;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: none;
  color: color-mix(in srgb, #fff 62%, var(--brand-teal));
}
.course-hero-v3-title {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(1.65rem, 3.6vw, 2.35rem);
  font-weight: 750;
  letter-spacing: -.025em;
  line-height: 1.15;
  color: #fff;
  text-wrap: balance;
}
.course-hero-v3-desc {
  margin: .7rem 0 0;
  max-width: 40rem;
  font-size: .95rem;
  line-height: 1.55;
  color: color-mix(in srgb, #fff 74%, transparent);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}
.course-hero-v3-desc.prose p { margin: 0 0 .4rem; color: inherit; }
.course-hero-v3-desc.prose p:last-child { margin: 0; }
.course-hero-v3-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .85rem 1.25rem;
  margin-top: 1.35rem;
}
.hero-actions-lead {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .7rem 1rem;
  min-width: 0;
  flex: 1 1 18rem;
}
.hero-actions-aside {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: .55rem .75rem;
  min-width: 0;
  flex: 1 1 14rem;
}
.hero-actions-secondary,
.hero-actions-tertiary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .55rem;
}
.hero-actions-tertiary {
  padding-left: .75rem;
  margin-left: .15rem;
  border-left: 1px solid color-mix(in srgb, #fff 28%, transparent);
}
.course-hero-v3-actions .hero-tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  min-height: 2.35rem;
  padding: .4rem .85rem;
  font-size: .84rem;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  margin: 0;
  vertical-align: middle;
}
.course-hero-v3-actions .hero-tool-btn .btn-label {
  line-height: 1.2;
}
.course-hero-v3-actions .hero-tool-btn i,
.course-hero-v3-actions .hero-tool-btn .ui-ico {
  flex: none;
  font-size: .95em;
}
.course-hero-v3 .btn-primary {
  background: var(--brand-action);
  border-color: var(--brand-action);
  color: #fff;
  box-shadow: 0 8px 24px rgba(45, 108, 223, .35);
}
.course-hero-v3 .btn-primary:hover {
  background: color-mix(in srgb, var(--brand-action) 88%, #fff);
}
.course-hero-v3 .btn-outline-secondary,
.course-hero-v3 .btn-outline {
  background: transparent;
  border: 1px solid color-mix(in srgb, #fff 38%, transparent);
  color: #fff;
  box-shadow: none;
}
.course-hero-v3 .btn-outline-secondary:hover,
.course-hero-v3 .btn-outline:hover {
  background: color-mix(in srgb, #fff 14%, transparent);
  border-color: color-mix(in srgb, #fff 55%, transparent);
  color: #fff;
  text-decoration: none;
}
.course-hero-v3 .btn-ghost-hero.hero-tool-btn {
  min-height: 2.35rem;
  padding: .4rem .85rem;
  font-size: .84rem;
  font-weight: 600;
}
[data-theme="dark"] .course-hero-v3-actions,
html.a11y-high-contrast .course-hero-v3-actions {
  /* Hero wash stays dark; keep light-on-dark controls readable in all themes */
  color: #f2f5f8;
}
html.a11y-high-contrast .course-hero-v3 .hero-tool-btn,
html.a11y-high-contrast .course-hero-v3 .btn-outline-secondary,
html.a11y-high-contrast .course-hero-v3 .btn-ghost-hero,
html.a11y-high-contrast .course-hero-v3 .btn-secondary-accent {
  border-width: 2px;
  border-color: #fff;
  color: #fff;
}
html.a11y-high-contrast .course-hero-v3 .btn-primary {
  border: 2px solid #fff;
}
@media (max-width: 720px) {
  .course-hero-v3-actions {
    flex-direction: column;
    align-items: stretch;
    gap: .85rem;
  }
  .hero-actions-lead,
  .hero-actions-aside {
    flex: 1 1 auto;
    width: 100%;
    justify-content: flex-start;
  }
  .hero-actions-aside {
    gap: .65rem;
  }
  .hero-actions-tertiary {
    width: 100%;
    margin-left: 0;
    padding-left: 0;
    padding-top: .55rem;
    border-left: 0;
    border-top: 1px solid color-mix(in srgb, #fff 28%, transparent);
  }
  .course-hero-v3-actions .hero-tool-btn {
    white-space: normal;
    text-align: left;
  }
}
.btn-lg {
  min-height: 48px;
  padding: .7rem 1.35rem;
  font-size: 1rem;
  font-weight: 700;
}
.btn-ghost-hero {
  background: transparent;
  border: 1px solid color-mix(in srgb, #fff 35%, transparent);
  color: #fff;
}
.btn-ghost-hero:hover {
  background: color-mix(in srgb, #fff 12%, transparent);
  color: #fff;
  text-decoration: none;
}
.hero-hint {
  font-size: .88rem;
  color: color-mix(in srgb, #fff 65%, transparent);
}
.hero-status {
  display: inline-flex;
  align-items: center;
  font-size: .88rem;
  font-weight: 600;
  color: color-mix(in srgb, #fff 85%, transparent);
}
.hero-status.is-warn { color: #f0d48a; }

/* ——— Запись: пауза / отчисление ——— */
.enroll-flags{
  display:inline-flex;flex-wrap:wrap;align-items:center;gap:.4rem;flex:none;
}
.enroll-flag{
  position:relative;
  display:inline-flex;align-items:center;gap:.35rem;margin:0;
  padding:.22rem .55rem .22rem .3rem;border-radius:var(--radius-chip);font-size:.74rem;font-weight:600;
  letter-spacing:0;cursor:pointer;user-select:none;
  border:1px solid transparent;line-height:1.2;
  transition:background .15s ease, border-color .15s ease, box-shadow .15s ease, color .15s ease;
}
.enroll-flag-input{
  position:absolute;opacity:0;width:1px;height:1px;margin:0;padding:0;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}
.enroll-flag-mark{
  width:1.2rem;height:1.2rem;border-radius:7px;flex:none;
  display:grid;place-items:center;
  border:1.5px solid currentColor;
  background:color-mix(in srgb, currentColor 8%, transparent);
  transition:background .15s ease, border-color .15s ease, transform .15s ease, color .15s ease;
}
.enroll-flag-mark i{
  font-size:.72rem;line-height:1;opacity:.35;
  transition:opacity .15s ease, transform .15s ease;
}
.enroll-flag-text{white-space:nowrap;}
.enroll-flag:hover .enroll-flag-mark{transform:translateY(-1px);}
.enroll-flag:focus-within{
  outline:2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset:2px;
}
.enroll-flag:has(.enroll-flag-input:checked) .enroll-flag-mark{
  background:currentColor;border-color:currentColor;color:#fff;
}
.enroll-flag:has(.enroll-flag-input:checked) .enroll-flag-mark i{
  opacity:1;color:#fff;transform:scale(1.05);
}
.enroll-flag.is-pause{
  color:#9a6500;background:rgba(240,196,80,.14);border-color:rgba(232,163,23,.4);
}
.enroll-flag.is-pause:hover{background:rgba(240,196,80,.22);}
.enroll-flag.is-pause:has(.enroll-flag-input:checked){
  color:#7a4e00;background:rgba(232,163,23,.28);border-color:#e8a317;
  box-shadow:none;
}
.enroll-flag.is-drop{
  color:#a12632;background:rgba(220,53,69,.08);border-color:rgba(220,53,69,.32);
}
.enroll-flag.is-drop:hover{background:rgba(220,53,69,.14);}
.enroll-flag.is-drop:has(.enroll-flag-input:checked){
  color:#8a1f28;background:rgba(220,53,69,.2);border-color:#dc3545;
  box-shadow:none;
}

.course-settings-head{
  display:grid;gap:.75rem;margin-bottom:1rem;
}
.course-settings-tabs{
  display:grid;grid-template-columns:1fr 1fr;gap:.35rem;
  padding:.28rem;border-radius:12px;
  background:var(--surface-muted, color-mix(in srgb, var(--ink) 5%, var(--surface)));
  border:1px solid var(--line);
}
.course-settings-tab{
  display:inline-flex;align-items:center;justify-content:center;gap:.35rem;
  min-height:2.15rem;padding:.35rem .55rem;border-radius:9px;
  color:var(--ink-soft);text-decoration:none;font-weight:700;font-size:.82rem;
  border:1px solid transparent;transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.course-settings-tab:hover{color:var(--ink);background:color-mix(in srgb, var(--surface) 70%, transparent);}
.course-settings-tab.is-active{
  color:var(--accent);background:var(--surface);border-color:color-mix(in srgb, var(--accent) 28%, var(--line));
  box-shadow:0 1px 2px rgba(0,0,0,.06);
}
.course-settings-tab-count{
  display:inline-grid;place-items:center;min-width:1.25rem;height:1.25rem;padding:0 .3rem;
  border-radius:999px;font-size:.7rem;font-weight:800;
  background:color-mix(in srgb, var(--accent) 14%, transparent);color:var(--accent);
}
.course-settings-tab.is-active .course-settings-tab-count{
  background:var(--accent);color:#fff;
}

.course-students{margin:0;padding:0;border:0;}
.course-students-hint{margin:0 0 .75rem;}
.course-students-head{
  display:flex;align-items:center;justify-content:space-between;gap:.5rem;margin-bottom:.35rem;
}
.course-students-list{
  list-style:none;margin:0 0 .75rem;padding:0;display:grid;gap:.5rem;
  max-height:min(32rem, 58vh);overflow:auto;
}
.course-student-row{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.55rem;
  padding:.55rem .65rem;border:1px solid var(--line);border-radius:12px;background:var(--surface);
}
.course-student-row.is-paused{
  border-color:rgba(232,163,23,.45);background:rgba(240,196,80,.08);
}
.course-student-who{display:flex;align-items:center;gap:.55rem;min-width:0;flex:1 1 10rem;}
.course-student-ava,.course-student-letter{
  width:36px;height:36px;border-radius:10px;object-fit:cover;flex:none;
}
.course-student-letter{
  display:grid;place-items:center;font-weight:800;font-size:.9rem;
  background:var(--accent-soft);color:var(--accent);
}
.course-student-meta{display:flex;flex-direction:column;min-width:0;}
.course-student-name{
  font-weight:700;font-size:.9rem;color:var(--ink);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

.course-access-list{
  display:grid;gap:.45rem;max-height:280px;overflow:auto;padding:.15rem 0;
}
.course-access-row{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.45rem .75rem;
  padding:.45rem .55rem;border:1px solid var(--line);border-radius:10px;
}
.course-access-row.is-paused{border-color:rgba(232,163,23,.45);background:rgba(240,196,80,.07);}
.course-access-row.is-off{opacity:.72;}
.course-access-on{margin:0;flex:1 1 12rem;min-width:0;}
.course-access-title{font-weight:600;}

@media (max-width:560px){
  .course-student-row,.course-access-row{align-items:flex-start;}
  .enroll-flags{width:100%;}
  .course-settings-tabs{grid-template-columns:1fr;}
}
.hero-reject {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .55rem;
}
.hero-reject p {
  margin: 0;
  max-width: 36rem;
  font-size: .9rem;
  color: color-mix(in srgb, #fff 70%, transparent);
}
.hero-progress {
  display: flex;
  align-items: center;
  gap: .75rem;
  min-width: min(100%, 280px);
  min-height: 2.35rem;
}
body.opt-show_progress-off .hero-progress,
body.opt-show_progress-off .hero-learner-links {
  display: none !important;
}
.hero-progress-track {
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: color-mix(in srgb, #fff 18%, transparent);
  overflow: hidden;
}
.hero-progress-track > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--brand-action), var(--brand-teal));
}
.hero-progress-label {
  font-size: .8rem;
  font-weight: 600;
  white-space: nowrap;
  color: color-mix(in srgb, #fff 70%, transparent);
}

.course-page-v3 .course-layout-v2 {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 1.35rem clamp(0.85rem, 2vw, 1.75rem) 2.25rem;
}
.course-page-edit .course-main { min-width: 0; }
.course-page-v3 .course-settings {
  position: sticky;
  top: 1rem;
  align-self: start;
  min-width: 0;
  max-width: 100%;
  overflow: visible;
}
.course-settings .settings-form,
.course-settings .settings-block,
.course-settings label {
  min-width: 0;
  max-width: 100%;
}
.course-settings input:not([type="checkbox"]):not([type="radio"]),
.course-settings select,
.course-settings textarea {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}
.course-settings input[type="file"] {
  width: 100%;
  max-width: 100%;
  font-size: .84rem;
}
.desc-field { display: grid; gap: .55rem; min-width: 0; }
.desc-field-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .45rem;
  flex-wrap: wrap;
}
.course-settings .desc-field-head .btn {
  flex: none;
  padding: .35rem .55rem;
}
.course-settings .desc-field-head .btn-label {
  font-size: .8rem;
}
.desc-preview {
  min-height: 3.25rem;
  max-height: 5.5rem;
  overflow: hidden;
  padding: .6rem .7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
  font-size: .86rem;
  line-height: 1.45;
  word-break: break-word;
  overflow-wrap: anywhere;
}
.desc-preview.prose {
  max-width: none;
  margin: 0;
}
.desc-preview.prose p,
.desc-preview.prose ul,
.desc-preview.prose ol {
  margin: 0 0 .35rem;
  font-size: inherit;
}
.desc-preview.prose p:last-child { margin-bottom: 0; }
.desc-preview.prose img,
.desc-preview.prose table,
.desc-preview.prose pre {
  display: none;
}
.curriculum-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.02em;
}

.modules-v3 .module {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: none;
  margin-bottom: .65rem;
  overflow: hidden;
  transition: border-color .2s ease;
}
.modules-v3 .module:hover { border-color: color-mix(in srgb, var(--accent) 28%, var(--line)); }
.modules-v3 .module-num {
  font-family: var(--font);
  font-variant-numeric: lining-nums;
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: 0;
  color: var(--ink-faint);
  background: var(--surface-muted);
  min-width: 2.4rem;
  height: 2.4rem;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.modules-v3 .module.m-done .module-num {
  background: var(--ok-soft);
  color: var(--ok);
}
.modules-v3 .module.m-progress .module-num {
  background: var(--accent-soft);
  color: var(--accent);
}
.modules-v3 .module-progress {
  background: var(--surface-strong);
  height: 4px;
}
.modules-v3 .module-progress-fill {
  background: linear-gradient(90deg, var(--brand-action), var(--brand-teal));
}

.about-course-v3 {
  padding: 1.25rem 0 0;
}
.about-course-v3 h2 {
  margin: 0 0 .75rem;
  font-weight: 700;
  letter-spacing: -.02em;
}
.about-course-v3 .about-facts {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.5rem;
  list-style: none;
  margin: 1.1rem 0;
  padding: 0;
  font-size: .95rem;
  color: var(--ink-soft);
}
.about-course-v3 .about-lock {
  margin: 0;
  padding: .9rem 1rem;
  border-left: 3px solid var(--teal);
  background: var(--teal-soft);
  color: var(--ink-soft);
  font-size: .92rem;
}

.chapter-header-v3 {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}
.chapter-header-v3 .chapter-header-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem 1rem;
  margin-bottom: .55rem;
  width: 100%;
}
.chapter-header-v3 .chapter-header-top + .chapter-rename-form,
.chapter-header-v3 .chapter-header-top + .chapter-title-v3 {
  margin-top: 0;
}
.chapter-header-v3 .eyebrow {
  font-size: .72rem;
  font-weight: 650;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
  line-height: 1.45;
}
.chapter-title-v3 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.15;
  color: var(--ink);
  text-align: left;
  width: 100%;
}

.reader-main .item {
  animation: tile-in .4s ease both;
}

@media (max-width: 720px) {
  .catalog-masthead {
    margin-inline: 0;
    border-radius: var(--radius-md);
  }
  .course-page-v3 {
    margin-inline: -1rem;
  }
  .course-hero-v3-title { max-width: none; }
  .course-page-v3 .course-layout-v2 {
    padding-inline: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .catalog-masthead-wash,
  .course-tile,
  .course-hero-v3-inner,
  .course-page-v3:hover .course-hero-v3-bg,
  .reader-main .item {
    animation: none !important;
    transition: none !important;
  }
  .course-hero-v3-bg { transform: none !important; }
}

/* ---------- skip-link: скрыт до фокуса с клавиатуры ---------- */
.skip-link {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
  border: 0 !important;
  background: #111;
  color: #fff !important;
  font-weight: 700;
  text-decoration: none !important;
  z-index: 10000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus,
.skip-link:focus-visible {
  position: fixed !important;
  left: 0 !important;
  top: 0 !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  padding: .65rem 1.1rem !important;
  overflow: visible !important;
  clip: auto !important;
  clip-path: none !important;
  white-space: normal !important;
  outline: 3px solid var(--accent, #2d6cdf);
  outline-offset: 2px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .28);
}

.a11y-panel-section {
  margin: 0;
  padding: .55rem 1rem .3rem;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  color: #4a5568;
  background: #f7f8fa;
  border-top: 1px solid #eceef2;
}
.a11y-panel-section:first-child { border-top: none; }
.a11y-theme-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .4rem;
  padding: .55rem .75rem .65rem;
  background: #fff;
  border-bottom: 1px solid #eceef2;
}
.a11y-scheme-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: .4rem;
  padding: .55rem .75rem .65rem;
  background: #fff;
  border-bottom: 1px solid #eceef2;
}
.a11y-scheme-btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  width: 100%;
  min-height: 2.75rem;
  padding: .5rem .65rem;
  border: 1px solid #d5dbe6;
  border-radius: 10px;
  background: #f5f7fb;
  color: #111;
  font-family: inherit;
  font-size: .86rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.a11y-scheme-btn i { font-size: 1.05rem; color: #2d6cdf; flex: none; }
.a11y-scheme-btn:hover { background: #eef3fb; border-color: #b9c8e4; }
.a11y-scheme-btn.is-active {
  background: #1f57c4;
  border-color: #1a4b9d;
  color: #fff;
}
.a11y-scheme-btn.is-active i { color: #fff; }
.a11y-scheme-btn:focus-visible {
  outline: 3px solid #ff6b00;
  outline-offset: 2px;
}
.a11y-theme-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .2rem;
  min-height: 3.1rem;
  padding: .4rem .25rem;
  border: 1px solid #d5dbe6;
  border-radius: 10px;
  background: #f5f7fb;
  color: #1a2a40;
  font-size: .72rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
}
.a11y-theme-btn i { font-size: 1.05rem; color: #2d6cdf; }
.a11y-theme-btn:hover {
  background: #eef3ff;
  border-color: #2d6cdf;
}
.a11y-theme-btn.is-active {
  background: #2d6cdf;
  border-color: #1a4b9d;
  color: #fff;
}
.a11y-theme-btn.is-active i { color: #fff; }
.a11y-theme-btn:focus-visible {
  outline: 3px solid #2d6cdf;
  outline-offset: 2px;
}

body.a11y-panel-open { overflow: hidden; }
@media (min-width: 992px) {
  body.a11y-panel-open { overflow: auto; }
}

.a11y-btn-desktop {
  display: none;
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 200;
  width: 3.5rem;
  height: 3.5rem;
  padding: 0;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: var(--surface);
  color: var(--accent);
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 28px rgba(13, 27, 42, 0.22);
  font-size: 1.4rem;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s, background .15s, color .15s;
}
@media (min-width: 992px) {
  body.has-shell .a11y-btn-desktop { display: inline-flex; }
}
.a11y-btn-desktop:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(13, 27, 42, 0.28);
  background: var(--accent-soft);
}
.a11y-btn-desktop.is-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent-strong, var(--accent));
}

.a11y-btn-mobile {
  display: inline-flex;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-size: 1.15rem;
  cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
}
.a11y-btn-mobile:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  color: var(--accent);
}
.a11y-btn-mobile.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong, var(--accent));
}

.a11y-panel {
  position: fixed;
  z-index: 210;
  width: min(22rem, calc(100vw - 1.5rem));
  border: 1px solid #1a1a1a;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.2);
  top: auto;
  right: auto;
  bottom: auto;
  left: auto;
  overflow: hidden;
  font-family: var(--font);
}
.a11y-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .85rem 1rem;
  border-bottom: 1px solid #e6e6e6;
  background: #fff;
}
.a11y-panel-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: #111;
  line-height: 1.2;
}
.a11y-panel-close {
  flex: none;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: none;
  border-radius: 2px;
  background: #2d6cdf;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  cursor: pointer;
}
.a11y-panel-close:hover { background: #1f57c4; }
.a11y-panel-list {
  display: flex;
  flex-direction: column;
  max-height: min(70vh, 32rem);
  overflow-y: auto;
}
.a11y-panel-item {
  display: flex;
  align-items: flex-start;
  gap: .85rem;
  width: 100%;
  padding: .75rem 1rem;
  border: none;
  border-bottom: 1px solid #ececec;
  background: #fff;
  color: #111;
  font-size: .95rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background .12s;
  font-family: inherit;
}
.a11y-panel-item > i { margin-top: .15rem; flex: none; }
.a11y-panel-item span { flex: 1; }
.a11y-item-copy {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  min-width: 0;
}
.a11y-item-copy > span { font-weight: 600; line-height: 1.25; }
.a11y-item-copy > small {
  font-size: .76rem;
  font-weight: 500;
  line-height: 1.35;
  color: #667085;
}
.a11y-panel-meta {
  flex: none;
  font-size: .72rem;
  font-weight: 700;
  color: #5a6478;
}
.a11y-panel-item:last-child { border-bottom: none; }
.a11y-panel-item i {
  flex: none;
  width: 1.35rem;
  font-size: 1.15rem;
  text-align: center;
  color: #222;
}
.a11y-panel-item:hover { background: #f5f7fb; }
.a11y-panel-item.is-active {
  background: #e9f0ff;
  color: #1a4b9d;
  box-shadow: inset 4px 0 0 #2d6cdf;
}
.a11y-panel-item.is-active::after {
  content: "Вкл";
  margin-left: .35rem;
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #1a4b9d;
}
.a11y-panel-item.is-active i { color: #1a4b9d; }
.a11y-panel-reset {
  margin: .75rem 1rem 1rem;
  width: calc(100% - 2rem);
  border: 1px solid #1a1a1a !important;
  border-radius: 2px;
  justify-content: center;
  font-weight: 600;
}

.a11y-panel-item:focus-visible {
  outline: 3px solid #2d6cdf;
  outline-offset: -3px;
  z-index: 1;
}

/* ---- реальные режимы доступности (только контент, не панель) ---- */
html.a11y-gray .a11y-content-root { filter: grayscale(1); }
html.a11y-negative .a11y-content-root { filter: invert(1) hue-rotate(180deg); }
html.a11y-negative .a11y-content-root img,
html.a11y-negative .a11y-content-root video,
html.a11y-negative .a11y-content-root .brand-logo,
html.a11y-negative .a11y-content-root picture {
  filter: invert(1) hue-rotate(180deg);
}

html.a11y-light-bg .a11y-content-root {
  --surface: #ffffff;
  --bg: #ffffff;
  --ink: #111111;
  --ink-soft: #333333;
  --ink-faint: #444444;
  --line: #cccccc;
  background: #ffffff !important;
  color: #111111 !important;
}
html.a11y-light-bg .a11y-content-root .panel,
html.a11y-light-bg .a11y-content-root .app-navbar,
html.a11y-light-bg .a11y-content-root .app-sidebar {
  background: #ffffff !important;
  color: #111111 !important;
}
html.a11y-light-bg .a11y-content-root .app-sidebar-brand,
html.a11y-light-bg .a11y-content-root .app-sidebar-brand:hover,
html.a11y-light-bg .a11y-content-root .brand-title-main,
html.a11y-light-bg .a11y-content-root .brand-title-org,
html.a11y-light-bg .a11y-content-root .app-side-nav a {
  color: #111111 !important;
}
html.a11y-light-bg .a11y-content-root .app-side-nav a:hover {
  background: #eeeeee !important;
  color: #000000 !important;
}
html.a11y-light-bg .a11y-content-root .app-side-nav a.is-active {
  background: #111111 !important;
  color: #ffffff !important;
}
html.a11y-light-bg .a11y-content-root .muted { color: #333333 !important; }

html.a11y-hide-images .a11y-content-root img:not(.brand-logo):not([data-a11y-keep]),
html.a11y-hide-images .a11y-content-root video,
html.a11y-hide-images .a11y-content-root picture,
html.a11y-hide-images .a11y-content-root canvas:not([data-a11y-keep]),
html.a11y-hide-images .a11y-content-root svg:not([data-a11y-keep]):not(.brand-logo) {
  visibility: hidden !important;
  opacity: 0 !important;
  max-width: 0 !important;
  max-height: 0 !important;
  overflow: hidden !important;
  border: none !important;
  padding: 0 !important;
  margin: 0 !important;
}
html.a11y-hide-images .a11y-content-root *:not(.brand-logo):not([data-a11y-keep]):not(.a11y-trigger):not(.a11y-panel):not(.a11y-panel *) {
  background-image: none !important;
}
html.a11y-hide-images .a11y-content-root figure:has(img:not(.brand-logo)) figcaption {
  display: block;
  padding: .75rem 1rem;
  border: 2px dashed var(--line, #ccc);
  border-radius: 8px;
  background: var(--surface, #fff);
  font-style: italic;
}

html.a11y-hide-icons .a11y-content-root .bi:not([data-a11y-keep]),
html.a11y-hide-icons .a11y-content-root [class*=" bi-"]:not([data-a11y-keep]),
html.a11y-hide-icons .a11y-content-root [class^="bi-"]:not([data-a11y-keep]) {
  visibility: hidden !important;
  opacity: 0 !important;
  width: 0 !important;
  min-width: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  overflow: hidden !important;
  font-size: 0 !important;
  line-height: 0 !important;
}
html.a11y-hide-icons .a11y-content-root .bi:not([data-a11y-keep])::before,
html.a11y-hide-icons .a11y-content-root [class*=" bi-"]:not([data-a11y-keep])::before,
html.a11y-hide-icons .a11y-content-root [class^="bi-"]:not([data-a11y-keep])::before {
  content: none !important;
  display: none !important;
}
html.a11y-hide-icons .a11y-content-root svg:not([data-a11y-keep]):not(.brand-logo) {
  visibility: hidden !important;
  opacity: 0 !important;
  width: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
}
html.a11y-hide-icons .a11y-content-root .navbar-toggler-icon {
  visibility: hidden !important;
  opacity: 0 !important;
}

@media (prefers-reduced-motion: reduce) {
  .a11y-content-root *,
  .a11y-content-root *::before,
  .a11y-content-root *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-contrast: more) {
  .a11y-content-root {
    --line: #000;
  }
  .a11y-content-root a:not(.btn) {
    text-decoration: underline;
    text-underline-offset: .14em;
  }
  .a11y-content-root .btn,
  .a11y-content-root input,
  .a11y-content-root select,
  .a11y-content-root textarea {
    border-width: 2px !important;
  }
}

/* ---- Высокий контраст: белый холст, чёрная боковая панель, без «невидимого» текста ---- */
html.a11y-high-contrast .a11y-content-root {
  --ink: #000000;
  --ink-soft: #000000;
  --ink-faint: #111111;
  --bg: #ffffff;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-muted: #f2f2f2;
  --surface-strong: #e8e8e8;
  --line: #000000;
  --line-strong: #000000;
  --accent: #0000aa;
  --accent-strong: #000088;
  --accent-soft: #e8e8ff;
  --accent-ink: #ffffff;
  --ok: #006600;
  --danger: #990000;
  --warn: #664400;
  background: #ffffff !important;
  color: #000000 !important;
}
html.a11y-high-contrast .a11y-content-root .muted,
html.a11y-high-contrast .a11y-content-root .text-secondary,
html.a11y-high-contrast .a11y-content-root .ink-faint {
  color: #111111 !important;
}
html.a11y-high-contrast .a11y-content-root .panel,
html.a11y-high-contrast .a11y-content-root .app-navbar,
html.a11y-high-contrast .a11y-content-root .bottom-nav,
html.a11y-high-contrast .a11y-content-root .course-tile,
html.a11y-high-contrast .a11y-content-root .catalog-toolbar {
  background: #ffffff !important;
  color: #000000 !important;
  border-color: #000000 !important;
}

/* Sidebar: white text on black (must beat blanket link color) */
html.a11y-high-contrast .a11y-content-root .app-sidebar {
  background: #000000 !important;
  color: #ffffff !important;
  border-right: 2px solid #ffffff;
}
html.a11y-high-contrast .a11y-content-root .app-sidebar-brand,
html.a11y-high-contrast .a11y-content-root .app-sidebar-brand:hover,
html.a11y-high-contrast .a11y-content-root .app-sidebar .brand-title-main,
html.a11y-high-contrast .a11y-content-root .app-sidebar .brand-title-org,
html.a11y-high-contrast .a11y-content-root .app-sidebar .nav-label,
html.a11y-high-contrast .a11y-content-root .app-side-nav a,
html.a11y-high-contrast .a11y-content-root .app-side-nav a i {
  color: #ffffff !important;
  text-decoration: none !important;
  font-weight: 700;
}
html.a11y-high-contrast .a11y-content-root .app-side-nav a {
  background: transparent !important;
  border: 2px solid transparent;
}
html.a11y-high-contrast .a11y-content-root .app-side-nav a:hover {
  background: #333333 !important;
  color: #ffffff !important;
}
html.a11y-high-contrast .a11y-content-root .app-side-nav a.is-active {
  background: #ffffff !important;
  color: #000000 !important;
  border-color: #ffffff !important;
  box-shadow: none !important;
}
html.a11y-high-contrast .a11y-content-root .app-side-nav a.is-active i,
html.a11y-high-contrast .a11y-content-root .app-side-nav a.is-active .nav-label {
  color: #000000 !important;
}
html.a11y-high-contrast .a11y-content-root .app-side-nav a .nav-badge {
  background: #ffffff !important;
  color: #000000 !important;
  border: 1px solid #000000;
}
html.a11y-high-contrast .a11y-content-root .app-side-nav a.is-active .nav-badge {
  background: #000000 !important;
  color: #ffffff !important;
}
html.a11y-high-contrast .a11y-content-root .guest-sidebar-note {
  background: #222222 !important;
  border-color: #ffffff !important;
  color: #ffffff !important;
}
html.a11y-high-contrast .a11y-content-root .guest-sidebar-note .muted {
  color: #eeeeee !important;
}

/* Content links — :where keeps specificity low so chrome overrides win */
html.a11y-high-contrast .a11y-content-root a:where(:not(.btn):not(.cat-chip):not(.app-sidebar-brand):not(.course-tile)) {
  color: #0000aa !important;
  text-decoration: underline !important;
  font-weight: 700;
}
/* Re-assert chrome after blanket link color (higher specificity / later order) */
html.a11y-high-contrast .a11y-content-root .app-side-nav a,
html.a11y-high-contrast .a11y-content-root .app-side-nav a:hover,
html.a11y-high-contrast .a11y-content-root .app-side-nav a i,
html.a11y-high-contrast .a11y-content-root .app-side-nav a .nav-label {
  color: #ffffff !important;
  text-decoration: none !important;
}
html.a11y-high-contrast .a11y-content-root .app-side-nav a.is-active,
html.a11y-high-contrast .a11y-content-root .app-side-nav a.is-active i,
html.a11y-high-contrast .a11y-content-root .app-side-nav a.is-active .nav-label {
  color: #000000 !important;
  text-decoration: none !important;
}
html.a11y-high-contrast .a11y-content-root .bottom-nav {
  background: #000000 !important;
  border-top: 2px solid #ffffff !important;
}
html.a11y-high-contrast .a11y-content-root .bottom-nav a {
  color: #ffffff !important;
  text-decoration: none !important;
}
html.a11y-high-contrast .a11y-content-root .bottom-nav a.is-active {
  color: #ffff00 !important;
}

/* Category chips / badges — never blue-on-blue */
html.a11y-high-contrast .a11y-content-root .cat-chip,
html.a11y-high-contrast .a11y-content-root .cat-chip.cat-chip-colored,
html.a11y-high-contrast .a11y-content-root .cat-badge {
  background: #ffffff !important;
  color: #000000 !important;
  border: 2px solid #000000 !important;
  box-shadow: none !important;
  filter: none !important;
  text-decoration: none !important;
}
html.a11y-high-contrast .a11y-content-root .cat-chip:hover,
html.a11y-high-contrast .a11y-content-root .cat-chip.cat-chip-colored:hover {
  background: #eeeeee !important;
  color: #000000 !important;
}
html.a11y-high-contrast .a11y-content-root .cat-chip.is-active,
html.a11y-high-contrast .a11y-content-root .cat-chip.cat-chip-colored.is-active {
  background: #000000 !important;
  color: #ffffff !important;
  border-color: #000000 !important;
  box-shadow: 0 0 0 2px #ffffff, 0 0 0 4px #000000 !important;
}
html.a11y-high-contrast .a11y-content-root .tag,
html.a11y-high-contrast .a11y-content-root .nav-badge,
html.a11y-high-contrast .a11y-content-root .badge {
  background: #000000 !important;
  color: #ffffff !important;
  border: 1px solid #000000 !important;
}

html.a11y-high-contrast .a11y-content-root .btn,
html.a11y-high-contrast .a11y-content-root button:not(.a11y-panel-item):not(.a11y-panel-close):not(.a11y-trigger),
html.a11y-high-contrast .a11y-content-root input,
html.a11y-high-contrast .a11y-content-root select,
html.a11y-high-contrast .a11y-content-root textarea {
  border: 2px solid #000000 !important;
  box-shadow: none !important;
  color: #000000 !important;
  background: #ffffff !important;
}
html.a11y-high-contrast .a11y-content-root .btn-primary,
html.a11y-high-contrast .a11y-content-root .btn-primary:hover {
  background: #000000 !important;
  color: #ffffff !important;
  border-color: #000000 !important;
}
html.a11y-high-contrast .a11y-content-root .btn-outline-secondary {
  background: #ffffff !important;
  color: #000000 !important;
}
html.a11y-high-contrast .a11y-content-root .app-navbar .nav-link {
  color: #000000 !important;
  text-decoration: none !important;
}
html.a11y-high-contrast .a11y-content-root .app-navbar .nav-link.active {
  color: #000000 !important;
  font-weight: 800;
  text-decoration: underline !important;
}

html.a11y-underline-links .a11y-content-root a:not(.btn):not(.a11y-panel-item) {
  text-decoration: underline !important;
  text-decoration-thickness: 2px !important;
  text-underline-offset: .15em;
}
html.a11y-underline-links .a11y-content-root a:not(.btn):visited {
  color: #551a8b !important;
}

html.a11y-readable-font .a11y-content-root,
html.a11y-readable-font .a11y-content-root *:not(.bi):not([class*="bi-"]) {
  font-family: "Atkinson Hyperlegible", Verdana, Arial, sans-serif !important;
  font-variant-ligatures: none;
}
/* Не сглаживать семантический жирный/курсив в режиме «читаемый шрифт» */
html.a11y-readable-font .a11y-content-root :is(strong, b) {
  font-weight: 700 !important;
}
html.a11y-readable-font .a11y-content-root :is(em, i) {
  font-style: italic !important;
}

html.a11y-spacing .a11y-content-root {
  line-height: 1.85 !important;
  letter-spacing: 0.04em;
  word-spacing: 0.1em;
}
html.a11y-spacing .a11y-content-root p,
html.a11y-spacing .a11y-content-root li,
html.a11y-spacing .a11y-content-root .panel,
html.a11y-spacing .a11y-content-root .btn {
  margin-bottom: .85em;
}
html.a11y-spacing .a11y-content-root .btn,
html.a11y-spacing .a11y-content-root input,
html.a11y-spacing .a11y-content-root select,
html.a11y-spacing .a11y-content-root textarea {
  min-height: 2.75rem;
  padding-top: .55rem;
  padding-bottom: .55rem;
}

html.a11y-no-motion .a11y-content-root *,
html.a11y-no-motion .a11y-content-root *::before,
html.a11y-no-motion .a11y-content-root *::after,
html.a11y-no-motion *,
html.a11y-no-motion *::before,
html.a11y-no-motion *::after {
  animation: none !important;
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition: none !important;
  transition-duration: 0.01ms !important;
  scroll-behavior: auto !important;
}

html.a11y-focus .a11y-content-root :focus-visible {
  outline: 4px solid #ff6b00 !important;
  outline-offset: 3px !important;
  box-shadow: 0 0 0 6px rgba(255, 107, 0, 0.35) !important;
}

html.a11y-headings .a11y-content-root :is(h1, h2, h3, h4, h5, h6, .display, .section-title) {
  background: #fff3bf !important;
  color: #000 !important;
  padding: .25em .4em !important;
  border-left: 4px solid #000 !important;
  border-radius: 2px;
}

html.a11y-big-cursor .a11y-content-root,
html.a11y-big-cursor .a11y-content-root * {
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'%3E%3Cpath fill='%23000' stroke='%23fff' stroke-width='1.5' d='M4 4l9 23 4-9 9-4z'/%3E%3C/svg%3E") 4 4, auto !important;
}

/* ---- Цветовые схемы (начертание) ---- */
html.a11y-scheme-bw .a11y-content-root {
  --ink: #000000;
  --ink-soft: #000000;
  --ink-faint: #222222;
  --bg: #ffffff;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-muted: #f5f5f5;
  --surface-strong: #eeeeee;
  --line: #000000;
  --line-strong: #000000;
  --accent: #0000aa;
  --accent-strong: #000088;
  --accent-soft: #e8e8ff;
  --accent-ink: #ffffff;
  background: #ffffff !important;
  color: #000000 !important;
}
html.a11y-scheme-wb .a11y-content-root {
  --ink: #ffffff;
  --ink-soft: #f2f2f2;
  --ink-faint: #dddddd;
  --bg: #000000;
  --bg-elevated: #111111;
  --surface: #111111;
  --surface-muted: #1a1a1a;
  --surface-strong: #222222;
  --line: #ffffff;
  --line-strong: #ffffff;
  --accent: #9ec5ff;
  --accent-strong: #c5dcff;
  --accent-soft: #333333;
  --accent-ink: #000000;
  background: #000000 !important;
  color: #ffffff !important;
}
html.a11y-scheme-blue .a11y-content-root {
  --ink: #001a4d;
  --ink-soft: #002b7a;
  --ink-faint: #003d99;
  --bg: #cce5ff;
  --bg-elevated: #d9ecff;
  --surface: #e6f2ff;
  --surface-muted: #d4e8ff;
  --surface-strong: #b8d9ff;
  --line: #003d99;
  --line-strong: #001a4d;
  --accent: #001a4d;
  --accent-strong: #000d26;
  --accent-soft: #b8d9ff;
  --accent-ink: #ffffff;
  background: #cce5ff !important;
  color: #001a4d !important;
}
html.a11y-scheme-bw .a11y-content-root .panel,
html.a11y-scheme-bw .a11y-content-root .app-navbar,
html.a11y-scheme-bw .a11y-content-root .bottom-nav,
html.a11y-scheme-bw .a11y-content-root .course-tile,
html.a11y-scheme-wb .a11y-content-root .panel,
html.a11y-scheme-wb .a11y-content-root .app-navbar,
html.a11y-scheme-wb .a11y-content-root .bottom-nav,
html.a11y-scheme-wb .a11y-content-root .course-tile,
html.a11y-scheme-blue .a11y-content-root .panel,
html.a11y-scheme-blue .a11y-content-root .app-navbar,
html.a11y-scheme-blue .a11y-content-root .bottom-nav,
html.a11y-scheme-blue .a11y-content-root .course-tile {
  background: var(--surface) !important;
  color: var(--ink) !important;
  border-color: var(--line) !important;
}
html.a11y-scheme-bw .a11y-content-root .muted,
html.a11y-scheme-bw .a11y-content-root .text-secondary,
html.a11y-scheme-wb .a11y-content-root .muted,
html.a11y-scheme-wb .a11y-content-root .text-secondary,
html.a11y-scheme-blue .a11y-content-root .muted,
html.a11y-scheme-blue .a11y-content-root .text-secondary {
  color: var(--ink-soft) !important;
}
html.a11y-scheme-bw .a11y-content-root a:where(:not(.btn)),
html.a11y-scheme-blue .a11y-content-root a:where(:not(.btn)) {
  color: var(--accent) !important;
  text-decoration: underline;
}
html.a11y-scheme-wb .a11y-content-root a:where(:not(.btn)) {
  color: var(--accent) !important;
  text-decoration: underline;
}
html.a11y-scheme-bw .a11y-content-root .app-sidebar,
html.a11y-scheme-wb .a11y-content-root .app-sidebar,
html.a11y-scheme-blue .a11y-content-root .app-sidebar {
  background: var(--surface-strong) !important;
  color: var(--ink) !important;
  border-color: var(--line) !important;
}
html.a11y-scheme-bw .a11y-content-root .app-side-nav a,
html.a11y-scheme-wb .a11y-content-root .app-side-nav a,
html.a11y-scheme-blue .a11y-content-root .app-side-nav a,
html.a11y-scheme-bw .a11y-content-root .app-side-nav a i,
html.a11y-scheme-wb .a11y-content-root .app-side-nav a i,
html.a11y-scheme-blue .a11y-content-root .app-side-nav a i,
html.a11y-scheme-bw .a11y-content-root .app-side-nav a .nav-label,
html.a11y-scheme-wb .a11y-content-root .app-side-nav a .nav-label,
html.a11y-scheme-blue .a11y-content-root .app-side-nav a .nav-label {
  color: var(--ink) !important;
}
html.a11y-scheme-bw .a11y-content-root .btn,
html.a11y-scheme-wb .a11y-content-root .btn,
html.a11y-scheme-blue .a11y-content-root .btn,
html.a11y-scheme-bw .a11y-content-root input,
html.a11y-scheme-wb .a11y-content-root input,
html.a11y-scheme-blue .a11y-content-root input,
html.a11y-scheme-bw .a11y-content-root select,
html.a11y-scheme-wb .a11y-content-root select,
html.a11y-scheme-blue .a11y-content-root select,
html.a11y-scheme-bw .a11y-content-root textarea,
html.a11y-scheme-wb .a11y-content-root textarea,
html.a11y-scheme-blue .a11y-content-root textarea {
  background: var(--surface) !important;
  color: var(--ink) !important;
  border-color: var(--line) !important;
}
html.a11y-scheme-bw .a11y-content-root .btn-primary,
html.a11y-scheme-wb .a11y-content-root .btn-primary,
html.a11y-scheme-blue .a11y-content-root .btn-primary {
  background: var(--accent) !important;
  color: var(--accent-ink) !important;
  border-color: var(--accent) !important;
}

.teacher-edit-flag{margin-top:.55rem;}
.teacher-edit-hint{margin:.15rem 0 0;max-width:36rem;}

/* ——— Хранилище (admin) ——— */
.admin-storage{
  --storage-control-h:2.5rem;
  --storage-pad:1.2rem 1.3rem;
  --storage-gap:.85rem;
  display:flex;flex-direction:column;gap:1.1rem;margin-top:.35rem;
}
.admin-storage .storage-vault-head{
  position:relative;overflow:hidden;border-radius:var(--radius-lg, 16px);
  background:var(--brand-gradient-masthead);
  color:#eef2f7;box-shadow:var(--shadow-2, 0 10px 28px rgba(13,27,42,.18));
}
.admin-storage .storage-vault-wash{
  position:absolute;inset:0;pointer-events:none;opacity:.55;
  background:
    radial-gradient(ellipse 70% 80% at 88% 18%, color-mix(in srgb, var(--brand-teal) 35%, transparent), transparent 55%),
    radial-gradient(ellipse 50% 60% at 12% 90%, color-mix(in srgb, var(--brand-action) 28%, transparent), transparent 50%),
    repeating-linear-gradient(-12deg, transparent, transparent 11px, rgba(255,255,255,.03) 11px, rgba(255,255,255,.03) 12px);
}
.admin-storage .storage-vault-head-inner{
  position:relative;z-index:1;padding:1.45rem 1.5rem 1.35rem;max-width:58rem;
}
.admin-storage .storage-vault-kicker{
  margin:0 0 .35rem;font-size:.72rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:rgba(238,242,247,.62);
}
.admin-storage .storage-vault-title{
  margin:0 0 .45rem;font-size:clamp(1.45rem,2.4vw,1.9rem);font-weight:800;
  letter-spacing:-.03em;line-height:1.15;color:#fff;
}
.admin-storage .storage-vault-lead{
  margin:0 0 1.1rem;color:rgba(238,242,247,.78);font-size:.95rem;line-height:1.45;max-width:42rem;
}
.admin-storage .storage-vault-stats{
  display:grid;gap:1rem;max-width:52rem;
}
@media (min-width:860px){
  .admin-storage .storage-vault-stats{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);align-items:start;}
}
.admin-storage .storage-capacity{display:grid;gap:.45rem;min-width:0;}
.admin-storage .storage-capacity.is-over .storage-capacity-used{background:linear-gradient(90deg,#c44,#e8a317);}
.admin-storage .storage-capacity-track{
  display:flex;height:12px;border-radius:999px;overflow:hidden;
  background:rgba(255,255,255,.12);box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);
}
.admin-storage .storage-capacity-used,
.admin-storage .storage-capacity-linked{background:var(--brand-gradient-bar);min-width:0;transition:width .35s ease;}
.admin-storage .storage-capacity-orphan{background:rgba(255,196,92,.85);min-width:0;}
.admin-storage .storage-capacity-meta{
  display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap;
  font-size:.78rem;font-weight:600;color:rgba(238,242,247,.7);font-variant-numeric:tabular-nums;
}
.admin-storage .storage-capacity-meta strong{color:#fff;font-weight:800;}
.admin-storage .storage-capacity-legend{
  list-style:none;margin:.15rem 0 0;padding:0;display:flex;flex-wrap:wrap;gap:.65rem 1rem;
  font-size:.74rem;font-weight:600;color:rgba(238,242,247,.65);
}
.admin-storage .storage-capacity-legend li{display:inline-flex;align-items:center;gap:.35rem;}
.admin-storage .storage-legend-dot{
  width:.55rem;height:.55rem;border-radius:999px;flex:none;
}
.admin-storage .storage-legend-dot.is-linked{background:var(--brand-teal, #18B0B8);}
.admin-storage .storage-legend-dot.is-orphan{background:rgba(255,196,92,.9);}
.admin-storage .storage-breakdown-wrap{display:grid;gap:.45rem;min-width:0;}
.admin-storage .storage-breakdown-title{
  margin:0;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:rgba(238,242,247,.58);
}
.admin-storage .storage-breakdown{
  list-style:none;margin:0;padding:0;display:grid;gap:.4rem;
}
.admin-storage .storage-breakdown-item{
  position:relative;display:grid;grid-template-columns:1fr auto;align-items:center;gap:.5rem .75rem;
  padding:.5rem .7rem;border-radius:10px;overflow:hidden;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);
  font-size:.82rem;font-variant-numeric:tabular-nums;
}
.admin-storage .storage-breakdown-bar{
  position:absolute;inset:0 auto 0 0;width:calc(var(--pct, 0) * 1%);max-width:100%;
  background:rgba(24,176,184,.22);pointer-events:none;
}
.admin-storage .storage-breakdown-item.is-video .storage-breakdown-bar{background:rgba(45,108,223,.28);}
.admin-storage .storage-breakdown-item.is-image .storage-breakdown-bar{background:rgba(24,176,184,.28);}
.admin-storage .storage-breakdown-item.is-other .storage-breakdown-bar{background:rgba(255,196,92,.2);}
.admin-storage .storage-breakdown-l,.admin-storage .storage-breakdown-n{position:relative;z-index:1;}
.admin-storage .storage-breakdown-l{font-weight:700;color:rgba(238,242,247,.92);}
.admin-storage .storage-breakdown-n{color:rgba(238,242,247,.68);white-space:nowrap;}

.admin-storage .storage-limits{padding:var(--storage-pad);display:grid;gap:var(--storage-gap);}
.admin-storage .storage-limits-head{
  display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:.75rem 1rem;
}
.admin-storage .storage-limits-form{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;align-items:start;
}
.admin-storage .storage-limit-field{margin:0;display:grid;gap:.35rem;align-content:start;}
.admin-storage .storage-limit-field > span:first-child{font-size:.8rem;font-weight:700;color:var(--ink-soft);}
.admin-storage .storage-limit-field .form-control{min-height:var(--storage-control-h);}
.admin-storage .storage-limits-actions{
  grid-column:1 / -1;display:flex;flex-wrap:wrap;gap:.65rem;align-items:center;padding-top:.15rem;
}
@media (max-width:900px){
  .admin-storage .storage-limits-form{grid-template-columns:1fr;}
}

.admin-storage .storage-metric-row{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.75rem;
}
@media (max-width:1100px){
  .admin-storage .storage-metric-row{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:520px){
  .admin-storage .storage-metric-row{grid-template-columns:1fr;}
}
.admin-storage .storage-metric{
  display:flex;flex-direction:column;justify-content:center;gap:.2rem;min-height:4.6rem;
  padding:.85rem 1rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  box-shadow:var(--shadow-1);color:inherit;text-decoration:none;
  transition:border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.admin-storage a.storage-metric:hover{
  border-color:var(--accent);transform:translateY(-1px);
  box-shadow:0 8px 20px rgba(13,27,42,.08);
}
.admin-storage .storage-metric.is-active{
  border-color:var(--accent);background:var(--accent-soft);
  box-shadow:inset 0 0 0 1px rgba(45,108,223,.25);
}
.admin-storage .storage-metric.is-muted{opacity:.72;cursor:default;}
.admin-storage .storage-metric-n{
  font-size:1.4rem;font-weight:800;letter-spacing:-.03em;line-height:1.1;
  font-variant-numeric:tabular-nums;color:var(--ink);
}
.admin-storage .storage-metric.is-warn .storage-metric-n{color:var(--warn);}
.admin-storage .storage-metric.is-bad .storage-metric-n{color:var(--danger);}
.admin-storage .storage-metric-l{font-size:.8rem;font-weight:600;color:var(--ink-soft);line-height:1.25;}

.admin-storage .storage-kind-panel{padding:var(--storage-pad);display:grid;gap:.75rem;}
.admin-storage .storage-kind-head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.35rem .75rem;
}
.admin-storage .storage-kind-chips{
  display:flex;flex-wrap:wrap;gap:.45rem;
}
.admin-storage .storage-kind-chip{
  display:inline-flex;flex-direction:column;gap:.1rem;min-height:2.65rem;
  padding:.45rem .75rem;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);color:inherit;text-decoration:none;
  transition:border-color .15s ease, background .15s ease;
}
.admin-storage .storage-kind-chip:hover{border-color:var(--accent);background:var(--accent-soft);}
.admin-storage .storage-kind-chip.is-active{
  border-color:var(--accent);background:var(--accent-soft);
  box-shadow:inset 0 0 0 1px rgba(45,108,223,.2);
}
.admin-storage .storage-kind-chip-l{font-size:.78rem;font-weight:700;color:var(--ink);}
.admin-storage .storage-kind-chip-n{font-size:.72rem;font-weight:600;color:var(--ink-soft);font-variant-numeric:tabular-nums;}

.admin-storage .storage-workbench{padding:var(--storage-pad);display:grid;gap:var(--storage-gap);}
.admin-storage .storage-workbench-head{
  display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:.75rem 1rem;
}
.admin-storage .storage-active-filters{
  display:flex;flex-wrap:wrap;align-items:center;gap:.45rem .55rem;
  padding:.55rem .7rem;border-radius:10px;border:1px dashed var(--line);
  background:color-mix(in srgb, var(--surface-muted) 45%, var(--surface));
}
.admin-storage .storage-filter-chip{
  display:inline-flex;align-items:center;gap:.35rem;padding:.2rem .55rem;
  border-radius:999px;border:1px solid var(--line);background:var(--surface);
  font-size:.78rem;font-weight:600;color:var(--ink-soft);
}
.admin-storage .storage-filter-chip-x{
  display:inline-grid;place-items:center;width:1.1rem;height:1.1rem;border-radius:999px;
  color:var(--ink-soft);text-decoration:none;line-height:1;font-size:.95rem;
}
.admin-storage .storage-filter-chip-x:hover{background:var(--danger-soft);color:var(--danger);}
.admin-storage .storage-filter-clear{
  margin-left:auto;font-size:.78rem;font-weight:700;color:var(--accent);text-decoration:none;
}
.admin-storage .storage-filter-clear:hover{text-decoration:underline;}
.admin-storage .storage-workbench-top{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:.85rem 1rem;
}
.admin-storage .storage-filters{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:.65rem;flex:1 1 22rem;margin:0;min-width:0;
}
.admin-storage .storage-filter{
  margin:0;min-width:7.5rem;flex:0 1 9.5rem;display:grid;gap:.28rem;
}
.admin-storage .storage-filter span{font-size:.78rem;font-weight:600;color:var(--ink-soft);}
.admin-storage .storage-filter .form-select{min-height:var(--storage-control-h);padding-top:.35rem;padding-bottom:.35rem;}
.admin-storage .storage-filter-grow{flex:1 1 14rem;min-width:11rem;}
.admin-storage .storage-search{display:block;width:100%;}
.admin-storage .storage-search .admin-search-input.form-control{min-height:var(--storage-control-h);}
.admin-storage .storage-filter-submit{
  width:var(--storage-control-h);height:var(--storage-control-h);padding:0;flex:none;
  display:inline-grid;place-items:center;
}
.admin-storage .storage-workbench-tools{display:flex;align-items:center;gap:.65rem;flex:none;}
.admin-storage .storage-view-toggle{
  display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;flex:none;
}
.admin-storage .storage-view-btn{
  width:var(--storage-control-h);height:var(--storage-control-h);display:grid;place-items:center;
  color:var(--ink-soft);background:var(--surface);text-decoration:none;
}
.admin-storage .storage-view-btn:hover{color:var(--accent);background:var(--accent-soft);}
.admin-storage .storage-view-btn.is-active{color:var(--accent-ink);background:var(--accent);}
.admin-storage .storage-crud-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:.65rem .75rem;
  padding-top:.85rem;border-top:1px dashed var(--line);
}
.admin-storage .storage-upload-form{margin:0;}
.admin-storage .storage-upload-label{margin:0;cursor:pointer;display:inline-block;}
.admin-storage .storage-upload-label .btn{pointer-events:none;min-height:2rem;}
.admin-storage .storage-crud-bar > .btn{min-height:2rem;}
.admin-storage .storage-crud-bar > form{margin:0;}
.admin-storage .storage-crud-bar > form .btn{min-height:2rem;}
.admin-storage .storage-hint{
  flex:1 1 14rem;margin:0;font-size:.84rem;line-height:1.4;color:var(--ink-soft);min-width:12rem;
}

.admin-storage .storage-missing{padding:var(--storage-pad);}
.admin-storage .storage-missing-head{display:flex;align-items:center;gap:.65rem;margin-bottom:.35rem;}
.admin-storage .storage-missing-list{list-style:none;margin:.75rem 0 0;padding:0;display:grid;gap:.75rem;}
.admin-storage .storage-missing-item{
  padding:.75rem .9rem;border-radius:12px;border:1px solid rgba(220,53,69,.22);
  background:rgba(220,53,69,.05);
}
.admin-storage .storage-missing-path{font-size:.86rem;word-break:break-all;}

.admin-storage .storage-empty{
  text-align:center;padding:2.5rem 1.25rem;display:grid;justify-items:center;gap:.35rem;
}
.admin-storage .storage-empty-mark{
  width:3.2rem;height:3.2rem;border-radius:14px;display:grid;place-items:center;
  background:var(--teal-soft);color:var(--teal);font-size:1.45rem;margin-bottom:.35rem;
}
.admin-storage .storage-empty h3{margin:0;font-size:1.15rem;font-weight:800;}

.admin-storage .storage-bulk-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:.65rem .75rem;
  padding:.65rem .85rem;margin-bottom:.75rem;
}
.admin-storage .storage-select-all{margin:0;gap:.45rem;min-height:var(--storage-control-h);align-items:center;}
.admin-storage .storage-bulk-count{min-width:5.5rem;}
.admin-storage .storage-bulk-total{margin-left:auto;font-variant-numeric:tabular-nums;}
.admin-storage .storage-col-check{width:2.2rem;}

.admin-storage .storage-table-wrap{padding:0;overflow:auto;}
.admin-storage .storage-table{margin:0;}
.admin-storage .storage-table th,.admin-storage .storage-table td{vertical-align:middle;}
.admin-storage .storage-table thead th{
  position:sticky;top:0;background:var(--surface);z-index:1;
  font-size:.72rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);
  padding-top:.65rem;padding-bottom:.65rem;
}
.admin-storage .storage-row.is-orphan{background:rgba(255,196,92,.06);}
.admin-storage .storage-file-cell{display:flex;align-items:center;gap:.75rem;min-width:16rem;}
.admin-storage .storage-thumb{
  width:48px;height:48px;border-radius:10px;overflow:hidden;flex:none;padding:0;
  border:1px solid var(--line);background:var(--surface-muted, var(--bg));
  display:grid;place-items:center;color:var(--ink-soft);cursor:zoom-in;
}
.admin-storage .storage-thumb img{width:100%;height:100%;object-fit:cover;}
.admin-storage .storage-thumb.is-file{font-size:1.2rem;cursor:default;}
.admin-storage .storage-file-meta{display:flex;flex-direction:column;gap:.15rem;min-width:0;}
.admin-storage .storage-name{font-weight:600;color:var(--ink);word-break:break-all;line-height:1.25;}
.admin-storage .storage-name:hover{color:var(--accent);}
.admin-storage .storage-copy{
  border:0;background:none;padding:0;text-align:left;cursor:pointer;
  font:inherit;word-break:break-all;max-width:100%;
}
.admin-storage .storage-copy:hover{color:var(--accent);}
.admin-storage .storage-usage{list-style:none;margin:0;padding:0;display:grid;gap:.2rem;font-size:.84rem;}
.admin-storage .storage-usage a{color:var(--accent);}
.admin-storage .storage-actions{
  text-align:right;white-space:nowrap;display:flex;justify-content:flex-end;align-items:center;gap:.25rem;
}
.admin-storage .storage-actions .icon-btn{
  width:2.25rem;height:2.25rem;padding:0;display:inline-grid;place-items:center;
}
.admin-storage .storage-locked{
  color:var(--ink-faint);font-size:1rem;display:inline-grid;place-items:center;
  width:2.25rem;height:2.25rem;
}

.admin-storage .storage-kind-cover,.admin-storage .storage-kind-avatar,.admin-storage .storage-kind-embed,
.admin-storage .storage-kind-assignment,.admin-storage .storage-kind-other,
.admin-storage .storage-kind-admin{font-weight:600;}

.admin-storage .storage-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem;
}
@media (max-width:480px){
  .admin-storage .storage-grid{grid-template-columns:1fr;}
}
.admin-storage .storage-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:14px;overflow:hidden;
  box-shadow:var(--shadow-1);
  animation:storageCardIn .35s ease both;
  animation-delay:calc(var(--i, 0) * 28ms);
}
@keyframes storageCardIn{
  from{opacity:0;transform:translateY(8px);}
  to{opacity:1;transform:none;}
}
@media (prefers-reduced-motion:reduce){
  .admin-storage .storage-card{animation:none;}
  .admin-storage a.storage-metric:hover{transform:none;}
}
.admin-storage .storage-card.is-orphan{border-color:rgba(255,196,92,.45);}
.admin-storage .storage-card.is-linked .storage-card-spine{background:linear-gradient(180deg,var(--accent),var(--teal));}
.admin-storage .storage-card.is-orphan .storage-card-spine{background:linear-gradient(180deg,#e8a317,#f0c14a);}
.admin-storage .storage-card-media{position:relative;aspect-ratio:4/3;background:var(--brand-gradient-cover);}
.admin-storage .storage-card-spine{
  position:absolute;left:0;top:0;bottom:0;width:5px;z-index:2;
}
.admin-storage .storage-card-check{
  position:absolute;top:.55rem;left:.7rem;z-index:3;margin:0;
  background:rgba(13,27,42,.55);border-radius:8px;padding:.2rem .35rem;
  backdrop-filter:blur(4px);
}
.admin-storage .storage-card-check input{margin:0;}
.admin-storage .storage-card-preview{
  position:absolute;inset:0;border:0;padding:0;cursor:zoom-in;background:transparent;
}
.admin-storage .storage-card-preview img{width:100%;height:100%;object-fit:cover;display:block;}
.admin-storage .storage-card-fileico{
  position:absolute;inset:0;display:grid;place-content:center;gap:.35rem;
  color:rgba(238,242,247,.88);text-align:center;font-size:2rem;
}
.admin-storage .storage-card-fileico span{
  font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:rgba(238,242,247,.55);
}
.admin-storage .storage-card-body{display:grid;gap:.35rem;padding:.85rem .9rem 1rem;}
.admin-storage .storage-card-tags{display:flex;flex-wrap:wrap;gap:.35rem;align-items:center;}
.admin-storage .storage-card-name{
  font-weight:700;font-size:.9rem;color:var(--ink);line-height:1.3;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.admin-storage .storage-card-name:hover{color:var(--accent);}
.admin-storage .storage-card-meta{margin:0;font-size:.78rem;}
.admin-storage .storage-card-usage{margin:0;font-size:.82rem;line-height:1.35;}
.admin-storage .storage-card-actions{
  display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.25rem;align-items:center;
}
.admin-storage .storage-card-actions .btn{min-height:2rem;}

.admin-storage .storage-lightbox,
.storage-lightbox{
  position:fixed;inset:0;z-index:1080;display:grid;place-items:center;
  padding:1.5rem;background:rgba(13,27,42,.82);backdrop-filter:blur(6px);
}
.admin-storage .storage-lightbox[hidden],
.storage-lightbox[hidden]{display:none!important;}
.admin-storage .storage-lightbox-close,
.storage-lightbox-close{
  position:absolute;top:1rem;right:1rem;width:2.5rem;height:2.5rem;
  border:0;border-radius:999px;background:rgba(255,255,255,.12);color:#fff;
  font-size:1.6rem;line-height:1;cursor:pointer;
}
.admin-storage .storage-lightbox-close:hover,
.storage-lightbox-close:hover{background:rgba(255,255,255,.22);}
.admin-storage .storage-lightbox-figure,
.storage-lightbox-figure{margin:0;max-width:min(920px,96vw);text-align:center;}
.admin-storage .storage-lightbox-figure img,
.storage-lightbox-figure img{
  max-width:100%;max-height:78vh;border-radius:12px;
  box-shadow:0 20px 50px rgba(0,0,0,.35);
}
.admin-storage .storage-lightbox-figure figcaption,
.storage-lightbox-figure figcaption{
  margin-top:.75rem;color:rgba(238,242,247,.8);font-size:.9rem;word-break:break-all;
}

/* ---------- Media lightbox (course images) ---------- */
.media-lightbox{
  position:fixed;inset:0;z-index:1090;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:1rem 1.25rem 5.5rem;
  background:rgba(13,27,42,.88);backdrop-filter:blur(8px);
}
.media-lightbox[hidden]{display:none!important;}
.media-lightbox-backdrop{
  position:absolute;inset:0;cursor:zoom-out;
}
.media-lightbox-stage{
  position:relative;z-index:1;flex:1 1 auto;
  display:flex;align-items:center;justify-content:center;
  width:100%;max-width:min(1200px,96vw);
  min-height:0;overflow:hidden;touch-action:none;
}
.media-lightbox-stage img{
  max-width:100%;max-height:calc(100vh - 9rem);
  object-fit:contain;border-radius:10px;
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  transform-origin:center center;
  user-select:none;-webkit-user-drag:none;
}
.media-lightbox-toolbar{
  position:absolute;bottom:1.25rem;left:50%;transform:translateX(-50%);
  z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:.35rem;padding:.45rem .55rem;border-radius:14px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.14);
  backdrop-filter:blur(10px);
}
.media-lightbox-btn{
  appearance:none;border:0;width:2.75rem;height:2.75rem;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  color:#fff;background:rgba(255,255,255,.1);cursor:pointer;
  font-size:1.05rem;line-height:1;
}
.media-lightbox-btn:hover{background:rgba(255,255,255,.2);}
.media-lightbox-btn:disabled{opacity:.35;cursor:not-allowed;}
.media-lightbox-btn.media-lightbox-close{
  width:2.75rem;height:2.75rem;font-size:1.1rem;
}
.media-lightbox-caption{
  position:absolute;bottom:4.75rem;left:50%;transform:translateX(-50%);
  z-index:2;max-width:min(720px,92vw);margin:0;padding:.35rem .75rem;
  text-align:center;color:rgba(238,242,247,.88);font-size:.9rem;line-height:1.4;
}
.media-lightbox-counter{
  position:absolute;top:1rem;left:50%;transform:translateX(-50%);
  z-index:2;margin:0;padding:.25rem .65rem;border-radius:999px;
  font-size:.78rem;font-weight:600;color:rgba(238,242,247,.75);
  background:rgba(255,255,255,.08);
}
@media (max-width:560px){
  .media-lightbox{padding:.75rem .75rem 5rem;}
  .media-lightbox-toolbar{bottom:.85rem;gap:.25rem;padding:.35rem .4rem;}
  .media-lightbox-btn{width:2.75rem;height:2.75rem;font-size:.98rem;}
  .media-lightbox-caption{bottom:4.25rem;font-size:.82rem;}
}

@media (max-width:900px){
  .storage-metric-row{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:560px){
  .storage-metric-row{grid-template-columns:1fr;}
  .storage-vault-head-inner{padding:1.15rem 1.1rem 1.1rem;}
  .storage-file-cell{min-width:12rem;}
  .storage-bulk-bar .ms-auto{margin-left:0!important;width:100%;}
}

.plugin-card-main { min-width: 0; flex: 1 1 16rem; }
.plugin-about { font-size: .92rem; line-height: 1.45; color: var(--ink); max-width: 70ch; }
.plugin-howto { line-height: 1.4; max-width: 70ch; }
.plugin-edit { margin-top: .35rem; }
.plugin-edit summary {
  cursor: pointer; font-weight: 600; font-size: .88rem; color: var(--ink-soft);
}
.plugin-edit summary:hover { color: var(--accent); }

/* ---- Admin plugins grid ---- */
.admin-plugins { gap: 1.35rem; }
.admin-plugins-intro { margin-bottom: .05rem; }
.plugin-section { display: flex; flex-direction: column; gap: .65rem; }
.plugin-section-head {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .15rem 0 .35rem;
  border-bottom: 1px solid var(--line);
}
.plugin-section-ico {
  flex: 0 0 auto;
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-xs);
  border: 1px solid var(--line);
  background: var(--surface-muted);
  color: var(--brand-navy-2);
  font-size: .95rem;
}
.plugin-section-title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 650;
  letter-spacing: .01em;
  color: var(--ink);
  line-height: 1.25;
}
.plugin-section-count {
  margin-left: auto;
  font-size: .78rem;
  font-variant-numeric: tabular-nums;
}
.plugin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
  gap: .85rem;
}
.plugin-card {
  display: flex;
  flex-direction: column;
  gap: .65rem;
  padding: .9rem 1rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  box-shadow: none;
  transition: border-color .15s ease;
}
.plugin-card:hover {
  border-color: color-mix(in srgb, var(--brand-navy) 28%, var(--line));
  box-shadow: none;
}
.plugin-card.is-off {
  opacity: .9;
  background: var(--surface-muted);
}
.plugin-card-top {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
}
.plugin-card-icon {
  flex: 0 0 auto;
  width: 2.35rem;
  height: 2.35rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-xs);
  background: color-mix(in srgb, var(--brand-navy) 7%, var(--surface));
  color: var(--brand-navy-2);
  font-size: 1.2rem;
  line-height: 1;
  border: 1px solid color-mix(in srgb, var(--brand-navy) 12%, var(--line));
}
.plugin-card-icon .bi::before {
  display: inline-block;
  vertical-align: middle;
}
.plugin-card.is-off .plugin-card-icon {
  color: var(--ink-soft);
  background: color-mix(in srgb, var(--ink-soft) 8%, var(--surface));
}
.plugin-card-head { min-width: 0; flex: 1 1 auto; }
.plugin-card-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem .45rem;
}
.plugin-card-title {
  margin: 0;
  font-size: .98rem;
  font-weight: 650;
  line-height: 1.25;
  color: var(--ink);
}
.plugin-card-slug {
  display: inline-block;
  margin-top: .2rem;
  font-size: .72rem;
  color: var(--ink-soft);
  background: transparent;
  border: 0;
  padding: 0;
}
.plugin-chip {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  max-width: 100%;
  padding: .1rem .45rem;
  border-radius: var(--radius-chip);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: .68rem;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
}
.plugin-chip--status.is-on {
  color: var(--ok);
  border-color: color-mix(in srgb, var(--ok) 40%, transparent);
  background: var(--ok-soft);
}
.plugin-chip--status.is-off {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 35%, transparent);
  background: var(--danger-soft);
}
.plugin-chip--sphere {
  color: var(--brand-navy-2);
  border-color: color-mix(in srgb, var(--brand-navy) 18%, var(--line));
  background: color-mix(in srgb, var(--brand-navy) 5%, var(--surface));
}
.plugin-card-toggle { flex: 0 0 auto; margin-left: auto; }
.plugin-card .plugin-about {
  margin: 0;
  font-size: .9rem;
  line-height: 1.45;
  color: var(--ink);
  max-width: none;
}
.plugin-howto-callout {
  padding: .55rem .7rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--line);
  background: var(--surface-muted);
}
.plugin-howto-label {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .01em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: .25rem;
}
.plugin-howto-text {
  margin: 0;
  font-size: .86rem;
  line-height: 1.45;
  color: var(--ink);
}
.plugin-hint { margin-top: -.15rem; }
.plugin-advanced {
  margin-top: .1rem;
  border-top: 1px solid var(--line);
  padding-top: .5rem;
}
.plugin-advanced > summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: .82rem;
  color: var(--ink-soft);
  user-select: none;
}
.plugin-advanced > summary::-webkit-details-marker { display: none; }
.plugin-advanced > summary::before {
  content: "▸";
  display: inline-block;
  margin-right: .35rem;
  transition: transform .12s ease;
  color: var(--brand-navy-2);
}
.plugin-advanced[open] > summary::before { transform: rotate(90deg); }
.plugin-advanced > summary:hover { color: var(--ink); }
.plugin-advanced-body {
  margin-top: .55rem;
  padding: .7rem .75rem;
  border-radius: var(--radius-xs);
  background: var(--surface-muted);
  border: 1px solid var(--line);
}
@media (max-width: 560px) {
  .plugin-card-top { flex-wrap: wrap; }
  .plugin-card-toggle { width: 100%; margin-left: 0; }
  .plugin-card-toggle .btn { width: 100%; }
}

/* ---------- Activity control / quiz / video ---------- */
.quiz-settings-tabs{display:flex;flex-wrap:wrap;gap:.4rem;margin:.35rem 0 .75rem;}
.quiz-plugin-hint{margin:0 0 .55rem;width:100%;}
.quiz-settings-tab{
  appearance:none;border:1px solid var(--line);background:var(--surface);
  color:var(--ink-soft);border-radius:var(--radius-sm);padding:.4rem .75rem;
  font-size:.86rem;font-weight:600;cursor:pointer;
}
.quiz-settings-tab:hover{border-color:var(--accent);color:var(--accent);}
.quiz-settings-tab.is-active{
  background:var(--accent);border-color:var(--accent);color:var(--accent-ink);
}
.quiz-tab-panel{display:none;}
.quiz-tab-panel.is-active{display:flex;flex-direction:column;gap:.75rem;}
.quiz-timer-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:.75rem;
  padding:.65rem .85rem;margin-bottom:.75rem;
  background:color-mix(in srgb, var(--accent-secondary) 10%, var(--surface));
  border:1px solid color-mix(in srgb, var(--accent-secondary) 28%, var(--line));
  border-radius:var(--radius-sm);
}
.quiz-timer{font-weight:700;font-variant-numeric:tabular-nums;color:var(--accent-strong);}
.quiz-timer.is-urgent{color:var(--danger);}
.quiz-teacher-attempts{margin-top:.85rem;}
.quiz-attempts-table tr.is-void{background:var(--danger-soft);}
.quiz-control-rules{
  margin-bottom:.85rem;
  border:1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
  background:color-mix(in srgb, var(--accent) 6%, var(--surface));
}
.quiz-control-rules.is-violation{
  border-color:color-mix(in srgb, var(--danger) 40%, var(--line));
  background:var(--danger-soft);
}
.quiz-control-rules-title{
  margin:0 0 .45rem;font-weight:700;font-size:.95rem;
  display:flex;align-items:center;gap:.45rem;
}
.quiz-control-rules-list{margin:0;padding-left:1.15rem;}
.quiz-control-rules-list li{margin:.2rem 0;}
.quiz-block{margin-bottom:1.25rem;}
/* hero tool buttons: aligned via .hero-actions-* */
.quiz-q-hint{font-weight:400;}
.quiz-text-input{max-width:28rem;margin-top:.35rem;}
.quiz-match{margin-top:.5rem;}
.quiz-match-pool{
  padding:.55rem .65rem;margin-bottom:.65rem;
  background:var(--surface-muted);border:1px solid var(--line);border-radius:var(--radius-sm);
}
.quiz-match-chips{display:flex;flex-wrap:wrap;gap:.45rem;margin-top:.35rem;}
.quiz-match-chip{
  padding:.35rem .65rem;border-radius:var(--radius-chip);
  background:color-mix(in srgb, var(--accent) 12%, var(--surface));
  border:1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  font-size:.88rem;cursor:grab;user-select:none;
}
.quiz-match-chip:active{cursor:grabbing;}
.quiz-match-rows{display:grid;gap:.45rem;}
.quiz-match-row{
  display:grid;grid-template-columns:minmax(8rem,1fr) minmax(9rem,1fr) minmax(9rem,1fr) auto;gap:.55rem;align-items:center;
}
@media (max-width:760px){.quiz-match-row{grid-template-columns:1fr;}}
.quiz-match-left{
  padding:.45rem .55rem;background:var(--surface-muted);
  border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;
}
.quiz-match-slot{
  min-height:2.4rem;padding:.35rem .45rem;
  border:2px dashed color-mix(in srgb, var(--accent) 40%, var(--line));
  border-radius:var(--radius-sm);background:var(--surface);
  display:flex;align-items:center;gap:.35rem;flex-wrap:wrap;
}
.quiz-match-slot.is-over{
  border-color:var(--accent);background:color-mix(in srgb, var(--accent) 8%, var(--surface));
}
.quiz-match-placeholder{font-size:.82rem;}
.quiz-match-select{min-height:44px;}
.quiz-match-remove{min-height:44px;}
.quiz-order-list{
  list-style:none;margin:0;padding:0;display:grid;gap:.35rem;
}
.quiz-order-item{
  display:flex;align-items:center;gap:.5rem;padding:.45rem .55rem;
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--surface);cursor:grab;
}
.quiz-order-item.is-dragging{opacity:.55;}
.quiz-order-handle{color:var(--ink-faint);}
.quiz-order-text{flex:1;min-width:0;}
.quiz-order-actions{display:flex;gap:.25rem;margin-left:auto;}
.qb-type-row{margin-bottom:.5rem;}
.qb-type-row select{max-width:18rem;width:auto;}
.qb-multi-correct input[type=checkbox]{margin-right:.35rem;}
.qb-lines{display:grid;gap:.35rem;}
.qb-line-row{
  display:flex;flex-wrap:nowrap;gap:.35rem;align-items:center;
  width:100%;min-width:0;
}
.qb-line-row input,
.qb-line-row .qb-line{
  flex:1 1 auto;min-width:0;width:auto;max-width:none;
}
.qb-line-row .qb-delline,
.qb-line-row .icon-btn{flex:0 0 auto;}
.qb-pair-row{display:flex;flex-wrap:nowrap;gap:.35rem;align-items:center;}
.qb-pair-row input.qb-pair{width:4.5rem;min-width:4.5rem;flex:0 0 auto;}
.qb-opts{display:grid;gap:.35rem;min-width:0;}
.qb-addopt,.qb-addline,.qb-addline-left,.qb-addline-right,.qb-addline-item{
  align-self:flex-start;width:auto;
}
.progress-summary-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(10rem,1fr));gap:.85rem;
}
.progress-summary-card{
  padding:.75rem;border-radius:var(--radius-sm);
  background:var(--surface-muted);border:1px solid var(--line);
}
.progress-summary-card.is-warn{
  border-color:color-mix(in srgb, var(--warn) 45%, var(--line));
  background:var(--warn-soft);
}
.progress-summary-label{display:block;font-size:.82rem;color:var(--ink-soft);}
.progress-summary-value{display:block;font-size:1.35rem;line-height:1.2;margin:.15rem 0;}
.progress-module{margin-bottom:1rem;}
.progress-module-title{font-size:1.05rem;margin:0 0 .75rem;}
.progress-chapter{padding:.65rem 0;border-top:1px solid var(--line);}
.progress-chapter:first-of-type{border-top:0;padding-top:0;}
.progress-chapter-head{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem;
  margin-bottom:.45rem;
}
.progress-chapter-link{
  display:flex;align-items:center;gap:.45rem;font-weight:600;color:var(--ink);text-decoration:none;
}
.progress-chapter-link:hover{color:var(--accent);}
.progress-icon.done{color:var(--ok);}
.progress-icon.pending{color:var(--ink-faint);}
.progress-table{width:100%;font-size:.9rem;}
.progress-table th{font-weight:600;color:var(--ink-soft);font-size:.8rem;}
.progress-status{font-weight:600;font-size:.82rem;}
.progress-status.is-done{color:var(--ok);}
.progress-status.is-progress{color:var(--accent);}
.progress-status.is-failed{color:var(--danger);}
.progress-status.is-pending{color:var(--warn);}
.progress-status.is-optional{color:var(--ink-faint);}
.course-student-row{align-items:center;}
.page-head-main{
  display:flex;flex-direction:column;gap:.3rem;min-width:0;flex:1 1 100%;
}
.page-head-compact .page-title{margin:0;font-size:1.55rem;line-height:1.25;}
.page-sub{margin:0;font-size:.92rem;max-width:42rem;}
.completion-summary{margin-bottom:1rem;}
.completion-panel{padding:0;overflow:hidden;}
.completion-toolbar{
  display:flex;flex-wrap:wrap;align-items:center;gap:.65rem;
  padding:.85rem 1rem;border-bottom:1px solid var(--line);
  background:var(--surface-muted);
}
.completion-search{
  display:flex;flex:1 1 16rem;gap:.5rem;align-items:center;min-width:0;
}
.completion-search input{
  width:auto;flex:1 1 auto;min-width:0;max-width:100%;
}
.completion-actions{
  display:flex;flex-wrap:wrap;gap:.5rem;margin-left:auto;
}
.completion-panel .table-scroll{margin:0;padding:.35rem .65rem .75rem;}
.completion-panel .progress-table{margin:0;}
.completion-empty{padding:2.4rem 1.35rem;}
.completion-empty-title{
  margin:0 0 .45rem;font-size:1.1rem;font-weight:700;color:var(--ink);
  letter-spacing:-.02em;
}
.page-head-compact{
  margin-bottom:1.15rem;
  padding-bottom:.7rem;
}
.page-head-compact .breadcrumb{
  margin:0;
  letter-spacing:.01em;
}

/* Reporting: completion + gradebook (summary-first) */
.rpt-wrap{padding:.35rem .75rem 1rem;}
.rpt-table-head{
  display:grid;
  grid-template-columns:minmax(10rem,1.4fr) repeat(4,minmax(5.5rem,1fr)) minmax(6.5rem,.9fr) 7.5rem;
  gap:.65rem;align-items:end;
  padding:.55rem .85rem .4rem;
  color:var(--ink-soft);font-size:.75rem;font-weight:600;letter-spacing:.02em;
  text-transform:uppercase;border-bottom:1px solid var(--line);
}
.rpt-table-head-grades{
  grid-template-columns:minmax(10rem,1.5fr) minmax(6rem,1fr) minmax(6rem,1fr) minmax(5.5rem,.9fr) 7.5rem;
}
.rpt-student{
  border:1px solid var(--line);
  border-radius:var(--radius-xs);
  background:var(--surface);
  margin-top:.45rem;
}
.rpt-student[open]{
  border-color:color-mix(in srgb, var(--brand-navy, var(--accent-strong)) 28%, var(--line));
  box-shadow:0 0 0 1px color-mix(in srgb, var(--brand-teal, var(--teal)) 18%, transparent);
}
.rpt-summary{
  display:grid;
  grid-template-columns:minmax(10rem,1.4fr) repeat(4,minmax(5.5rem,1fr)) minmax(6.5rem,.9fr) 7.5rem;
  gap:.65rem;align-items:center;
  list-style:none;cursor:pointer;
  padding:.7rem .85rem;
}
.rpt-summary-grades{
  grid-template-columns:minmax(10rem,1.5fr) minmax(6rem,1fr) minmax(6rem,1fr) minmax(5.5rem,.9fr) 7.5rem;
}
.rpt-summary::-webkit-details-marker{display:none;}
.rpt-summary::marker{content:"";}
.rpt-cell{min-width:0;}
.rpt-cell-student{display:flex;flex-direction:column;gap:.1rem;}
.rpt-name{
  font-weight:650;color:var(--brand-navy, var(--ink));
  text-decoration:none;letter-spacing:-.01em;
}
a.rpt-name:hover{color:var(--accent);text-decoration:underline;}
.rpt-frac{font-variant-numeric:tabular-nums;font-weight:600;font-size:.92rem;}
.rpt-bar{
  display:block;margin-top:.28rem;height:.28rem;
  background:var(--surface-muted);border-radius:2px;overflow:hidden;
}
.rpt-bar-fill{
  display:block;height:100%;width:0;
  background:var(--brand-navy-2, var(--accent-strong));
}
.rpt-bar-fill.is-teal{background:var(--brand-teal, var(--teal));}
.rpt-cell-toggle{
  display:inline-flex;align-items:center;justify-content:flex-end;gap:.35rem;
  color:var(--brand-teal, var(--teal));font-size:.82rem;font-weight:600;
}
.rpt-chev{transition:transform .15s ease;font-size:.85rem;}
.rpt-student[open] .rpt-chev{transform:rotate(180deg);}
.rpt-detail{
  padding:.15rem .85rem 1rem;
  border-top:1px solid var(--line);
  background:color-mix(in srgb, var(--surface-muted) 70%, var(--surface));
}
.rpt-detail-head{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.5rem;margin:.65rem 0 .55rem;
}
.rpt-detail-title{
  margin:0;font-size:.98rem;font-weight:700;color:var(--brand-navy, var(--ink));
  letter-spacing:-.015em;
}
.rpt-act-table{width:100%;font-size:.88rem;border-collapse:collapse;}
.rpt-act-table th{
  text-align:left;font-size:.75rem;font-weight:600;color:var(--ink-soft);
  text-transform:uppercase;letter-spacing:.02em;
  padding:.4rem .5rem;border-bottom:1px solid var(--line);
}
.rpt-act-table td{
  padding:.55rem .5rem;vertical-align:top;
  border-bottom:1px solid color-mix(in srgb, var(--line) 80%, transparent);
}
.rpt-act-table tr:last-child td{border-bottom:0;}
.rpt-act-name{font-weight:650;color:var(--ink);}

@media (max-width:900px){
  .rpt-desktop-only{display:none;}
  .rpt-summary,
  .rpt-summary-grades{
    grid-template-columns:1fr 1fr;
    gap:.55rem .75rem;
  }
  .rpt-cell-student{grid-column:1 / -1;}
  .rpt-cell-toggle{grid-column:1 / -1;justify-content:flex-start;padding-top:.15rem;}
  .rpt-cell[data-label]::before{
    content:attr(data-label);
    display:block;font-size:.72rem;font-weight:600;color:var(--ink-soft);
    text-transform:uppercase;letter-spacing:.02em;margin-bottom:.15rem;
  }
  .rpt-cell-metric .rpt-bar{max-width:9rem;}
}
@media (max-width:640px){
  .completion-actions{margin-left:0;width:100%;}
  .completion-actions .btn{flex:1 1 auto;}
  .rpt-wrap{padding:.25rem .55rem .85rem;}
  .rpt-summary,
  .rpt-summary-grades{padding:.75rem .7rem;grid-template-columns:1fr;}
}
.video-trust-badge{
  display:inline-flex;align-items:center;gap:.4rem;flex-wrap:wrap;
  font-size:.86rem;margin:0 0 .65rem;color:var(--ink-soft);
}
.video-trust-badge .tag{margin-left:.25rem;}
.video-progress-bar{
  margin-top:.65rem;height:.4rem;background:var(--surface-muted);
  border-radius:999px;overflow:hidden;
}
.video-progress-fill{
  height:100%;width:0;background:var(--accent-secondary);
  transition:width .25s ease;
}
.video-control-settings{margin-top:.75rem;}
.chapter-complete-wrap{display:flex;flex-direction:column;align-items:center;gap:.35rem;}
.chapter-pending{text-align:center;max-width:28rem;}
.btn.disabled,.btn:disabled{opacity:.65;cursor:not-allowed;}
.btn-secondary{
  background:var(--accent-secondary);border-color:var(--accent-secondary);color:#fff;
}
.btn-secondary:hover{filter:brightness(.95);color:#fff;}
.inline-form{display:inline;}
.gap-sm{gap:.35rem;}

/* ---------- File type icons ---------- */
.file-ic{
  display:inline-flex;align-items:center;justify-content:center;
  width:1.35em;height:1.35em;flex:none;line-height:1;
  vertical-align:-.15em;
}
.file-ic .bi{font-size:1.2em;line-height:1;}
.file-ic--pdf{color:#c62828;}
.file-ic--word{color:#1565c0;}
.file-ic--excel{color:#2e7d32;}
.file-ic--ppt{color:#ef6c00;}
.file-ic--image{color:#00897b;}
.file-ic--video{color:#283593;}
.file-ic--audio{color:#6a1b9a;}
.file-ic--zip{color:#6d4c41;}
.file-ic--code{color:#546e7a;}
.file-ic--file{color:var(--ink-faint);}
.file-link{
  display:inline-flex;align-items:center;gap:.45rem;
  color:var(--ink);text-decoration:none;font-weight:600;
  max-width:100%;
}
.file-link:hover{color:var(--accent);text-decoration:none;}
.file-link-label{
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0;
}
.file-download{
  display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;
}
.storage-thumb.is-file .file-ic,
.storage-card-fileico .file-ic{font-size:1.6rem;}
.storage-card-fileico{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.35rem;
  color:var(--ink-soft);
}
.storage-card-fileico .file-ic{font-size:2rem;}

/* ---- Diagram / diagrams.net chrome (Prosvet brand) ---- */
.tag.diagram {
  color: var(--brand-teal);
  border-color: var(--brand-teal);
  background: rgba(24, 176, 184, 0.12);
}
.diagram-chrome {
  --diagram-ink: var(--brand-navy);
  --diagram-rail: linear-gradient(120deg, var(--brand-navy) 0%, var(--brand-navy-2) 55%, #154a5c 100%);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background:
    radial-gradient(1200px 280px at 10% -20%, rgba(45, 108, 223, 0.18), transparent 60%),
    radial-gradient(900px 240px at 90% 0%, rgba(24, 176, 184, 0.16), transparent 55%),
    var(--surface, #fff);
  box-shadow: 0 10px 28px rgba(13, 27, 42, 0.08);
}
.diagram-chrome-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  padding: 0.65rem 0.9rem;
  background: var(--diagram-rail);
  color: #f4f7fb;
}
.diagram-chrome-brand {
  font-weight: 650;
  letter-spacing: 0.02em;
  font-size: 0.92rem;
}
.diagram-save-state {
  font-size: 0.8rem;
  opacity: 0.86;
  margin-right: auto;
}
.diagram-chrome-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.diagram-frame {
  display: block;
  width: 100%;
  min-height: min(68vh, 720px);
  height: 640px;
  border: 0;
  background: #f7f9fc;
}
.diagram-chrome:fullscreen,
.diagram-chrome:-webkit-full-screen {
  border-radius: 0;
  width: 100%;
  height: 100%;
}
.diagram-chrome:fullscreen .diagram-frame,
.diagram-chrome:-webkit-full-screen .diagram-frame {
  height: calc(100vh - 52px);
  min-height: 0;
}
.diagram-view {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  background:
    linear-gradient(180deg, rgba(242, 244, 247, 0.9), #fff 40%),
    repeating-linear-gradient(
      -12deg,
      transparent,
      transparent 11px,
      rgba(13, 27, 42, 0.03) 12px
    );
  overflow: auto;
}
.diagram-view svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}
.diagram-caption {
  color: var(--ink-soft);
  margin: 0 0 0.75rem;
}
.diagram-howto {
  padding: .7rem .85rem;
  margin: 0 0 .85rem;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--accent-secondary) 30%, var(--line));
  background: color-mix(in srgb, var(--accent-secondary) 7%, var(--surface));
}
.diagram-howto-steps {
  margin: .35rem 0 0 1.1rem;
  padding: 0;
}
.diagram-howto-steps li { margin: .2rem 0; }
.diagram-empty-hint {
  padding: .55rem .7rem;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--line);
  background: var(--surface-muted);
  margin: 0 0 .65rem;
}
.diagram-preview-thumb {
  max-height: 160px;
  overflow: hidden;
  opacity: 0.85;
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 0.5rem;
}
.diagram-preview-thumb svg {
  max-height: 140px;
  width: auto;
  max-width: 100%;
}
.code-io-panel {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem 1rem 1rem;
  background: linear-gradient(180deg, rgba(45, 108, 223, 0.05), transparent 70%);
}
.code-io-panel legend {
  font-weight: 650;
  padding: 0 0.35rem;
  color: var(--brand-navy-2);
}
.code-howto,
.diagram-howto {
  margin-bottom: 0.75rem;
}
.code-howto-steps,
.diagram-howto-steps {
  padding-left: 1.2rem;
}
.code-advanced {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.85rem 0.75rem;
  background: color-mix(in srgb, var(--surface) 92%, var(--ink) 8%);
}
.code-advanced > summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  padding: 0.35rem 0;
}
.code-advanced > summary::-webkit-details-marker { display: none; }
.code-advanced-body {
  margin-top: 0.65rem;
  padding-top: 0.35rem;
  border-top: 1px dashed var(--line);
}
.diagram-review-panel {
  margin-top: 0.85rem;
}
.diagram-review-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.85rem;
  margin: 0.55rem 0;
}
.diagram-review-item > summary {
  cursor: pointer;
  list-style: none;
}
.diagram-review-item > summary::-webkit-details-marker { display: none; }
.diagram-review-item[open] > summary {
  margin-bottom: 0.65rem;
}

@media (max-width: 720px) {
  .diagram-frame { height: 480px; min-height: 52vh; }
  .diagram-chrome-bar { align-items: flex-start; }
  .diagram-save-state { margin-right: 0; width: 100%; order: 3; }
}

/* ===== Premium: next-step, inbox, due, analytics, PWA ===== */
:root {
  --radius-btn: 8px;
  --radius-chip: 6px;
  --radius-control: 6px;
  --radius-md: 12px;
  --radius-lg: 14px;
  --muted: var(--ink-faint);
  --bs-border-radius: 10px;
  --bs-border-radius-lg: 14px;
  --bs-border-radius-xl: 18px;
}
.hero-price-block { display: flex; flex-direction: column; align-items: flex-start; gap: .55rem; }
.hero-price {
  margin: 0;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: .02em;
  color: #fff;
}
.catalog-author-tools { margin: 0 0 1rem; padding: .85rem 1rem; }
.catalog-author-tools-summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.catalog-author-tools-summary::-webkit-details-marker { display: none; }
.catalog-author-tools-hint {
  margin: .55rem 0 0;
  font-size: .88rem;
  line-height: 1.4;
}
.catalog-author-tools[open] .editor-panels { margin-top: .75rem; }
.catalog-author-tools .editor-panel {
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface-muted) 35%, var(--surface));
  box-shadow: none;
}
.chapter-nav-link {
  display: inline-flex; align-items: center; gap: .55rem; max-width: min(100%, 18rem);
  text-align: left;
}
.chapter-nav-label { display: flex; flex-direction: column; gap: .1rem; min-width: 0; }
.chapter-nav-dir { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; opacity: .75; }
.chapter-nav-title {
  font-size: .9rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.btn, button.btn { border-radius: var(--radius-btn); }
.tag, .chip, .tile-status, .nav-badge, .due-chip { border-radius: var(--radius-chip); }

.next-step-ribbon {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .85rem 1.15rem;
  margin: 1rem 0 1.25rem;
  padding: 1rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  border-radius: 14px;
  background:
    linear-gradient(120deg,
      color-mix(in srgb, var(--accent) 12%, var(--surface)),
      color-mix(in srgb, var(--brand-teal) 6%, var(--surface)) 55%,
      var(--surface));
  box-shadow: 0 8px 24px rgba(13, 27, 42, .06);
}
.next-step-ribbon.is-overdue {
  border-color: color-mix(in srgb, var(--danger) 45%, var(--line));
  background: linear-gradient(120deg, color-mix(in srgb, var(--danger) 10%, var(--surface)), var(--surface));
}
.next-step-ico {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  flex: none;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent-strong, var(--accent));
  font-size: 1.25rem;
}
.next-step-ribbon.is-overdue .next-step-ico {
  background: color-mix(in srgb, var(--danger) 14%, transparent);
  color: var(--danger);
}
.next-step-main { flex: 1 1 12rem; min-width: 0; }
.next-step-kicker {
  display: block;
  font-size: .78rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink-faint);
  font-weight: 600;
  margin-bottom: .2rem;
}
.next-step-title { display: block; font-size: 1.05rem; font-weight: 700; color: var(--ink); }
.next-step-detail { display: block; color: var(--ink-soft); font-size: .9rem; margin-top: .2rem; line-height: 1.4; }
.next-step-cta { white-space: nowrap; min-height: 42px; }

.inbox-list { display: grid; gap: .75rem; }
.inbox-card { text-decoration: none; color: inherit; transition: border-color .15s, box-shadow .15s; }
.inbox-card:hover { border-color: var(--accent); box-shadow: var(--shadow-sm, 0 1px 2px rgba(15,23,42,.08)); }
.inbox-card-top { display: flex; justify-content: space-between; gap: .75rem; margin-bottom: .35rem; }
.inbox-card-title { display: block; font-size: 1.02rem; }
.inbox-card-detail { color: var(--muted); margin: .2rem 0; }
.inbox-empty { text-align: center; padding: 2rem 1rem; }

.due-chip {
  display: inline-flex; align-items: center; margin: .35rem 0 0;
  padding: .2rem .55rem; font-size: .82rem; font-weight: 600;
  background: color-mix(in srgb, var(--warn, #8A5A10) 12%, var(--surface));
  color: var(--warn, #8A5A10); border: 1px solid color-mix(in srgb, var(--warn, #8A5A10) 28%, var(--line));
}
.analytics-strip { margin: 0 0 1rem; }
.analytics-grid { margin: 0; }

.qb-opt-row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: .5rem;
  align-items: center;
  width: 100%;
  min-width: 0;
  margin: 0;
  padding: .4rem .5rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  font-weight: 400;
  color: inherit;
  cursor: default;
}
.qb-opt-row + .qb-opt-row { margin-top: .4rem; }
.qb-opts-legend { font-size: .82rem; color: var(--muted); margin: .25rem 0 .5rem; }

.enroll-csv { margin-bottom: 1rem; }

@media (max-width: 640px) {
  .next-step-ribbon { padding: .85rem .9rem; }
  .rpt-student, .completion-panel .rpt-wrap { display: block; }
  .hero-tool-btn .btn-label { display: none; }
}

/* ===== A1 Premium Max: academic UI refinements ===== */

/* --- Course author rail: compact chips, no inline hint spam --- */
.course-author-rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .55rem .85rem;
  padding: .55rem clamp(.85rem, 2vw, 1.35rem);
  background: color-mix(in srgb, var(--brand-navy, var(--ink)) 3.5%, var(--surface));
  border-bottom: 1px solid var(--line);
}
.course-author-rail-main,
.course-author-rail-export {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
  min-width: 0;
}
.course-author-rail-export {
  padding-left: .75rem;
  border-left: 1px solid var(--line);
}
.course-author-rail-export-label {
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-faint, var(--ink-soft));
  margin-right: .15rem;
}
.course-author-chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  min-height: 2rem;
  padding: 0 .75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-size: .82rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease, color .15s ease;
}
.course-author-chip .bi {
  font-size: .95rem;
  opacity: .85;
}
.course-author-chip:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
  color: var(--ink);
}
.course-author-chip-quiet {
  color: var(--ink-soft);
  background: transparent;
}
.course-author-chip-quiet:hover { color: var(--ink); }
.course-author-rail .btn-hint-detail,
.course-author-bar .btn-hint-detail {
  display: none !important;
}
.course-author-rail .has-btn-hint,
.course-author-bar .has-btn-hint {
  flex-direction: row;
  align-items: center;
}
/* legacy author-bar (if referenced elsewhere) */
.course-author-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem .85rem;
  padding: .55rem 1.25rem;
  background: color-mix(in srgb, var(--brand-navy, var(--ink)) 3%, var(--surface));
  border-bottom: 1px solid var(--line);
}
.course-author-bar-group {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem .45rem;
  min-width: 0;
}
.course-author-bar-group + .course-author-bar-group {
  padding-left: .75rem;
  border-left: 1px solid var(--line);
}
.course-author-bar-label {
  font-size: .7rem;
  font-weight: 650;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}
.course-author-bar .btn {
  font-size: .82rem;
  min-height: 30px;
  padding: .28rem .72rem;
}
@media (max-width: 720px) {
  .course-author-rail { justify-content: flex-start; }
  .course-author-rail-export {
    padding-left: 0;
    border-left: 0;
    width: 100%;
  }
  .course-author-bar-group + .course-author-bar-group {
    padding-left: 0;
    border-left: 0;
  }
  .course-author-bar-label { display: none; }
}

/* --- Word export modal --- */
.word-export-panel { max-width: 36rem; }
.word-export-body { display: flex; flex-direction: column; gap: 1.1rem; }
.word-export-fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}
.word-export-legend {
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted, #64748b);
  margin-bottom: .55rem;
}
.word-export-choice {
  display: flex;
  gap: .65rem;
  align-items: flex-start;
  padding: .65rem .75rem;
  border: 1px solid var(--border, #e2e8f0);
  border-radius: .55rem;
  margin-bottom: .45rem;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.word-export-choice:hover {
  border-color: color-mix(in srgb, var(--accent, #2563eb) 35%, var(--border, #e2e8f0));
  background: color-mix(in srgb, var(--accent, #2563eb) 4%, transparent);
}
.word-export-choice:has(input:checked) {
  border-color: var(--accent, #2563eb);
  background: color-mix(in srgb, var(--accent, #2563eb) 8%, transparent);
}
.word-export-choice input { margin-top: .2rem; flex-shrink: 0; }
.word-export-choice-text { display: flex; flex-direction: column; gap: .15rem; line-height: 1.35; }
.word-export-check {
  display: flex;
  gap: .55rem;
  align-items: flex-start;
  margin-bottom: .4rem;
  cursor: pointer;
}
.word-export-check input { margin-top: .15rem; }
.word-export-handout {
  padding: .75rem .85rem;
  border-radius: .55rem;
  background: color-mix(in srgb, var(--accent, #2563eb) 6%, var(--surface, #fff));
  border: 1px dashed color-mix(in srgb, var(--accent, #2563eb) 25%, var(--border, #e2e8f0));
}
.word-export-handout-check { margin-bottom: 0; }
.word-export-quick {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}
.word-export-quick-btn {
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  text-align: left;
  padding: .65rem .75rem;
  border: 1px solid var(--border, #e2e8f0);
  border-radius: .55rem;
  background: var(--surface, #fff);
}
.word-export-quick-btn:hover {
  border-color: color-mix(in srgb, var(--accent, #2563eb) 35%, var(--border, #e2e8f0));
  background: color-mix(in srgb, var(--accent, #2563eb) 4%, var(--surface, #fff));
}
.word-export-quick-text {
  display: flex;
  flex-direction: column;
  gap: .1rem;
  line-height: 1.35;
}
.word-export-tree-hint { margin: 0 0 .45rem; }
.word-export-tree {
  max-height: 14rem;
  overflow: auto;
  padding: .55rem .65rem;
  border: 1px solid var(--border, #e2e8f0);
  border-radius: .55rem;
  background: color-mix(in srgb, var(--surface-2, #f8fafc) 80%, var(--surface, #fff));
  margin-bottom: .75rem;
}
.word-export-tree-module + .word-export-tree-module {
  margin-top: .55rem;
  padding-top: .55rem;
  border-top: 1px dashed var(--border, #e2e8f0);
}
.word-export-tree-topic { margin-left: .35rem; }
.word-export-tree-row {
  display: flex;
  align-items: flex-start;
  gap: .45rem;
  padding: .25rem 0;
  cursor: pointer;
  line-height: 1.35;
  font-size: .92rem;
}
.word-export-tree-row input { margin-top: .2rem; flex-shrink: 0; }
.word-export-tree-row--module { font-weight: 600; }
.word-export-tree-row--topic { margin-left: .85rem; }
.word-export-tree-row--chapter { margin-left: 1.7rem; font-size: .88rem; color: var(--muted, #64748b); }
.word-export-filter { margin-top: .15rem; }
.word-export-choice--compact { margin-bottom: .35rem; padding: .5rem .65rem; }

/* --- Learner hero: quiet report text-links --- */
.hero-learner-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .25rem .5rem;
  margin: .55rem 0 0;
  font-size: .85rem;
}
.hero-report-link {
  color: color-mix(in srgb, #fff 62%, transparent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  white-space: nowrap;
}
.hero-report-link:hover {
  color: #fff;
  text-decoration-thickness: 2px;
}
.hero-learner-links span[aria-hidden] {
  color: color-mix(in srgb, #fff 30%, transparent);
}

/* --- Empty-state as standalone panel --- */
.empty-state.panel,
.panel.empty-state {
  text-align: center;
  padding: 2.4rem 1.5rem;
  max-width: 36rem;
  margin: .5rem auto 1rem;
}
.empty-state h2,
.empty-state .completion-empty-title {
  margin: 0 0 .4rem;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.02em;
}

/* --- Auth card: academic radius (not bubbly) --- */
.auth-card { border-radius: 12px; }
.auth-mark  { border-radius: 12px; }

/* --- Reader calmer typography for chapter read mode --- */
.reader-main .chapter-title-v3 { max-width: 64ch; }
.reader-main .item .prose { line-height: 1.72; }
.reader-main .item .prose p { margin-bottom: .9rem; }
.reader-main .item .prose li { margin-bottom: .45rem; }

/* --- Reduced motion: suppress entrance animations --- */
@media (prefers-reduced-motion: reduce) {
  .course-hero-v3-inner { animation: none !important; }
  .course-tile { animation: none !important; opacity: 1 !important; transform: none !important; }
  .course-hero-v3-bg { transition: none !important; }
}

/* --- Page-header consistency for staff pages --- */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.2rem;
  margin-bottom: 1.35rem;
  padding-bottom: .85rem;
  flex-wrap: wrap;
  position: relative;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 88%, var(--brand-teal, var(--teal)));
}
.page-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: min(4.5rem, 28%);
  height: 2px;
  background: linear-gradient(90deg, var(--brand-navy, var(--ink)) 0%, var(--brand-teal, var(--teal)) 100%);
  border-radius: 1px;
}
.page-header .display,
.page-header .page-title { letter-spacing: -.025em; }

/* --- Sidebar secondary nav links (Запись/Вопросы/Проверка below primary Входящие) --- */
.app-side-nav a.nav-secondary {
  font-size: .80rem;
  padding: .4rem .6rem .4rem .9rem;
  color: rgba(232,238,246,.50);
  opacity: .85;
}
.app-side-nav a.nav-secondary i {
  font-size: 1rem;
  opacity: .7;
}
.app-side-nav a.nav-secondary:hover {
  color: rgba(232,238,246,.85);
  opacity: 1;
}
.app-side-nav a.nav-secondary.is-active {
  color: #fff;
  opacity: 1;
  background: rgba(45,108,223,.18);
}

/* --- UI density modes (понятный / стандарт / компактный) --- */

/* Понятный: подписи всегда, крупнее цели, больше воздуха, подсказки видны */
html.ui-density-simple .btn.has-ico .btn-label,
html.ui-density-simple .icon-btn .btn-label,
html.ui-density-simple .crud-tools .btn-label,
html.ui-density-simple .course-author-bar .btn.has-ico .btn-label,
html.ui-density-simple .course-author-rail .btn.has-ico .btn-label,
html.ui-density-simple .admin-invoice-actions .btn.has-ico .btn-label,
html.ui-density-simple .admin-toolbar .btn-icon .btn-label,
html.ui-density-simple .hero-tool-btn .btn-label {
  display: inline !important;
  position: static !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  padding: 0 !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: normal !important;
  border: 0 !important;
}
html.ui-density-simple .btn.has-ico,
html.ui-density-simple .nav-link,
html.ui-density-simple .admin-chip,
html.ui-density-simple .icon-btn,
html.ui-density-simple .hero-tool-btn {
  min-height: 44px;
  gap: .5rem;
}
html.ui-density-simple .btn {
  padding-inline: 1.1rem;
  font-weight: 600;
  font-size: 1.02em;
}
html.ui-density-simple .btn-sm {
  min-height: 40px;
  padding-block: .45rem;
  font-size: .95em;
}
html.ui-density-simple {
  --density-gap: 1.05rem;
}
html.ui-density-simple .activity-tile-hint { display: block !important; }
html.ui-density-simple .panel { padding: 1.25rem 1.3rem; }
html.ui-density-simple .stack { gap: 1.15rem; }
html.ui-density-simple .item { padding: 1.15rem 1.2rem; }
html.ui-density-simple .module { padding: 1.05rem 1.15rem; }
html.ui-density-simple .page-head { margin-bottom: 1.25rem; }
html.ui-density-simple .section-title { font-size: 1.2rem; }
html.ui-density-simple .form-hint,
html.ui-density-simple .btn-hint-detail {
  font-size: .82rem;
  line-height: 1.4;
}
/* Понятный всегда показывает подробные подсказки (даже в author-rail) */
html.ui-density-simple .btn-hint-detail,
html.ui-density-simple .course-author-rail .btn-hint-detail,
html.ui-density-simple .course-author-bar .btn-hint-detail {
  display: block !important;
}
html.ui-density-simple .learn-coach { display: block; }
html.ui-density-simple .create-coach { display: block; }
html.ui-density-simple .has-btn-hint {
  flex-direction: column;
  align-items: flex-start;
  gap: .2rem;
}
html.ui-density-simple .course-author-rail .has-btn-hint,
html.ui-density-simple .course-author-bar .has-btn-hint {
  flex-direction: column;
  align-items: flex-start;
}

/* Стандарт: явная «средняя» плотность */
html.ui-density-standard .btn-sm.has-ico .btn-label,
html.ui-density-standard .icon-btn .btn-label,
html.ui-density-standard .crud-tools .btn.has-ico .btn-label {
  display: inline;
  position: static;
  width: auto;
  clip: auto;
  overflow: visible;
}
html.ui-density-standard .panel { padding: 1rem 1.05rem; }
html.ui-density-standard .stack { gap: .8rem; }
html.ui-density-standard .activity-tile-hint { display: block; }

/* Компактный: подписи только у мелких toolbar/CRUD; у форм и главных кнопок — оставляем */
html.ui-density-compact .btn-sm.has-ico .btn-label,
html.ui-density-compact .icon-btn .btn-label,
html.ui-density-compact .crud-tools .btn.has-ico .btn-label,
html.ui-density-compact .course-author-bar .btn.has-ico .btn-label,
html.ui-density-compact .admin-invoice-actions .btn.has-ico .btn-label,
html.ui-density-compact .admin-toolbar .btn-icon .btn-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
html.ui-density-compact .btn-sm.has-ico,
html.ui-density-compact .icon-btn,
html.ui-density-compact .crud-tools .btn.has-ico,
html.ui-density-compact .course-author-bar .btn.has-ico {
  padding-inline: .5rem;
  min-width: 2.25rem;
  min-height: 2.2rem;
  justify-content: center;
}
html.ui-density-compact .activity-tile-hint { display: none; }
html.ui-density-compact .panel { padding: .7rem .8rem; }
html.ui-density-compact .item { padding: .85rem .9rem; }
html.ui-density-compact .module { padding: .75rem .9rem; }
html.ui-density-compact .stack { gap: .45rem; }
html.ui-density-compact .page-head { margin-bottom: .65rem; }
html.ui-density-compact .section-title { font-size: 1.02rem; }
html.ui-density-compact .btn { font-size: .92em; }
html.ui-density-compact .form-hint { font-size: .78rem; }

@media (max-width: 640px) {
  html.ui-density-simple .hero-tool-btn .btn-label { display: inline !important; }
}

/* Подсказки при создании — только в режиме подсказок / понятном */
.create-coach { display: none; }
html.show-create-hints .create-coach {
  display: block;
  margin-bottom: 1rem;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 55%, var(--surface));
}
.create-coach-head {
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  margin-bottom: .65rem;
}
.create-coach-head > i {
  font-size: 1.35rem;
  color: var(--accent);
  margin-top: .1rem;
}
.create-coach-steps {
  margin: 0 0 .75rem;
  padding-left: 1.2rem;
  color: var(--ink-soft);
  line-height: 1.5;
}
.create-coach-steps li { margin-bottom: .35rem; }

/* Справка */
.guide-page { max-width: 1100px; }
.guide-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.guide-layout {
  display: grid;
  grid-template-columns: minmax(200px, 240px) 1fr;
  gap: 1rem;
  align-items: start;
}
.guide-nav {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding: .65rem;
  position: sticky;
  top: 5rem;
}
.guide-nav-item {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .65rem .75rem;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  font-weight: 600;
  text-decoration: none;
}
.guide-nav-item:hover {
  background: var(--surface-muted);
  color: var(--ink);
  text-decoration: none;
}
.guide-nav-item.is-active {
  background: var(--accent-soft);
  color: var(--accent-strong, var(--accent));
}
.guide-body { padding: 1.25rem 1.35rem; }
.guide-steps {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  line-height: 1.55;
  color: var(--ink-soft);
}
.guide-steps li { margin-bottom: .45rem; }
.guide-list {
  margin: 0 0 1rem;
  padding-left: 1.15rem;
  color: var(--ink-soft);
  line-height: 1.5;
}
.guide-callout {
  display: flex;
  gap: .65rem;
  align-items: flex-start;
  padding: .85rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--callout-bg);
  border: 1px solid color-mix(in srgb, var(--callout-line) 28%, transparent);
  margin: 1rem 0 0;
}
.guide-callout i { color: var(--accent); margin-top: .1rem; }
.guide-callout p { margin: 0; color: var(--ink-soft); line-height: 1.45; }
.guide-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: .75rem;
}
.guide-card {
  padding: .85rem .95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
}
.guide-card h3 { margin: 0 0 .35rem; font-size: .95rem; }
.guide-card p { margin: 0; font-size: .85rem; color: var(--ink-soft); line-height: 1.4; }
.guide-faq {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
  margin-bottom: .55rem;
  background: var(--surface);
}
.guide-faq summary {
  cursor: pointer;
  font-weight: 650;
  color: var(--ink);
}
.guide-faq p {
  margin: .55rem 0 0;
  color: var(--ink-soft);
  line-height: 1.45;
}
.guide-faq-section {
  margin-bottom: 1.35rem;
}
.guide-faq-section-title {
  margin: 0 0 .65rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
}
.guide-faq-body {
  margin-top: .5rem;
}
.guide-faq-answer {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.5;
}
.guide-faq-subs {
  margin-top: .65rem;
  padding-left: .35rem;
  border-left: 2px solid color-mix(in srgb, var(--accent) 25%, var(--line));
}
.guide-faq-nested {
  margin-bottom: .4rem;
  padding: .55rem .75rem;
  background: var(--surface-muted);
  border-style: dashed;
}
.guide-faq-nested summary {
  font-size: .92rem;
  font-weight: 600;
}
.guide-faq-toc {
  margin-bottom: 1.1rem;
  padding: .85rem 1rem;
}
.guide-faq-toc-list {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: .25rem;
  font-size: .9rem;
}
.guide-faq-toc-list a {
  font-weight: 600;
}
@media (max-width: 800px) {
  .guide-layout { grid-template-columns: 1fr; }
  .guide-nav { position: static; flex-direction: row; flex-wrap: wrap; }
}

/* A11y panel extras */
.a11y-panel-lead {
  margin: 0;
  padding: .7rem 1rem .35rem;
  font-size: .82rem;
  line-height: 1.4;
  color: #556070;
  background: #fff;
}
.a11y-preset-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: .4rem;
  padding: .45rem .75rem .7rem;
  background: #fff;
  border-bottom: 1px solid #eceef2;
}
.a11y-preset-btn {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: .55rem;
  row-gap: .1rem;
  align-items: center;
  width: 100%;
  padding: .55rem .65rem;
  border: 1px solid #d8dee8;
  border-radius: 6px;
  background: #f7f9fc;
  color: #111;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}
.a11y-preset-btn i {
  grid-row: 1 / span 2;
  font-size: 1.15rem;
  color: #2d6cdf;
}
.a11y-preset-btn > span { font-weight: 650; font-size: .9rem; }
.a11y-preset-btn > small {
  grid-column: 2;
  font-size: .74rem;
  color: #667085;
  line-height: 1.3;
}
.a11y-preset-btn:hover { background: #eef3fb; border-color: #b9c8e4; }
.a11y-panel-foot {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1rem;
  padding: .7rem 1rem;
  border-top: 1px solid #eceef2;
  background: #f7f8fa;
  font-size: .82rem;
}
.a11y-panel-foot a {
  color: #1a4b9d;
  font-weight: 600;
  text-decoration: none;
}
.a11y-panel-foot a:hover { text-decoration: underline; }

.page-head.settings-head,
.guide-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}
.display, h1.display {
  letter-spacing: -0.015em;
  font-weight: 700;
}
.settings-head,
.guide-head .display {
  font-family: var(--font);
}
.btn, .nav-link, .form-control, .form-select, .panel, .section-title {
  font-family: var(--font);
}
.btn {
  letter-spacing: 0;
}
html.a11y-readable-font .a11y-panel,
html.a11y-readable-font .a11y-panel * {
  font-family: "Atkinson Hyperlegible", Verdana, Arial, sans-serif !important;
}

/* Онбординг */
.onboard-banner {
  margin-bottom: 1.1rem;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 40%, var(--surface));
}
.onboard-banner--under-masthead {
  margin-top: -.15rem;
  margin-bottom: .85rem;
  padding: .85rem 1rem;
}
.onboard-banner--under-masthead .section-title {
  font-size: 1.05rem;
}
.onboard-banner--under-masthead .onboard-steps {
  margin-bottom: .65rem;
  font-size: .92rem;
}
.onboard-kicker {
  margin: 0 0 .25rem;
  font-size: .8rem;
  font-weight: 600;
  color: var(--accent-strong, var(--accent));
}
.onboard-steps {
  margin: 0 0 .85rem;
  padding-left: 1.2rem;
  color: var(--ink-soft);
  line-height: 1.5;
}
.onboard-steps li { margin-bottom: .3rem; }
.onboard-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .65rem;
  align-items: center;
}

/* Банк вопросов */
.qbank-page { display: grid; gap: 1.15rem; margin-bottom: 1.5rem; }
.qbank-page-head { margin-bottom: 0; }
.qbank-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr);
  gap: 1rem;
  align-items: start;
}
.qbank-compose {
  padding: 1.15rem 1.25rem 1.25rem;
  border-radius: 16px;
}
.qbank-compose-head { margin-bottom: 1rem; }
.qbank-compose-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -.015em;
}
.qbank-compose-lead {
  margin: .3rem 0 0;
  font-size: .86rem;
  line-height: 1.45;
  color: var(--ink-soft);
}
.qbank-form {
  display: grid;
  gap: .9rem;
}
.qbank-field {
  display: grid;
  gap: .35rem;
  margin: 0;
  font-size: .86rem;
  font-weight: 650;
  color: var(--ink-soft);
}
.qbank-field .form-control,
.qbank-field .form-select {
  font-weight: 500;
  color: var(--ink);
  border-radius: 12px;
}
.qbank-field-type { max-width: 22rem; }
.qbank-opts {
  display: grid;
  gap: .55rem;
  padding: .85rem .9rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--surface-muted) 45%, var(--surface));
}
.qbank-opts-head { display: grid; gap: .2rem; }
.qbank-opts-title {
  margin: 0;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.qbank-opts-hint {
  margin: 0;
  font-size: .8rem;
  line-height: 1.4;
  color: var(--ink-soft);
}
.qbank-opt-list { display: grid; gap: .45rem; }
.qbank-opt-row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: .55rem;
  min-width: 0;
  margin: 0;
  padding: .35rem .4rem .35rem .45rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}
.qbank-opt-input {
  flex: 1 1 auto;
  min-width: 0;
  width: auto;
  max-width: none;
  border: 0 !important;
  box-shadow: none !important;
  background: transparent !important;
  padding-left: .15rem;
}
.qbank-opt-input:focus {
  outline: none;
}
.qbank-correct {
  position: relative;
  display: inline-flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: .4rem;
  flex: 0 0 auto;
  margin: 0;
  padding: .25rem .55rem .25rem .35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: color-mix(in srgb, var(--surface-muted) 70%, transparent);
  font-size: .78rem;
  font-weight: 650;
  color: var(--ink-soft);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}
.qbank-correct input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}
.qbank-correct-ui {
  width: 1.05rem;
  height: 1.05rem;
  border-radius: 999px;
  border: 1.5px solid color-mix(in srgb, var(--ink-soft) 55%, var(--line));
  background: var(--surface);
  flex: none;
  position: relative;
}
.qbank-correct-ui::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: inherit;
  background: var(--accent);
  transform: scale(0);
  transition: transform .12s ease;
}
.qbank-correct:has(input:checked) {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
}
.qbank-correct:has(input:checked) .qbank-correct-ui {
  border-color: var(--accent);
}
.qbank-correct:has(input:checked) .qbank-correct-ui::after {
  transform: scale(1);
}
.qbank-correct-text { line-height: 1; }
.qbank-num-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .65rem;
}
.qbank-advanced {
  border: 1px dashed color-mix(in srgb, var(--line) 90%, var(--ink-soft));
  border-radius: 12px;
  padding: .55rem .75rem .7rem;
  background: transparent;
}
.qbank-advanced summary {
  cursor: pointer;
  font-weight: 600;
  font-size: .86rem;
  color: var(--ink-soft);
}
.qbank-list-panel { padding: 1rem 1.1rem; border-radius: 16px; }
.qbank-list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  margin-bottom: .15rem;
}
.qbank-list-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6rem;
  height: 1.6rem;
  padding: 0 .4rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 700;
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
  color: var(--accent);
}
.qbank-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem;
  flex-wrap: wrap;
  padding: .8rem 0;
  border-bottom: 1px solid var(--line);
}
.qbank-item:last-child { border-bottom: none; padding-bottom: 0; }
.qbank-item-main {
  display: grid;
  gap: .35rem;
  min-width: 0;
  flex: 1;
}
.qbank-item-title {
  font-size: .95rem;
  line-height: 1.35;
  font-weight: 650;
}
.qbank-item-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem .55rem;
}
.qbank-item .tag {
  align-self: flex-start;
  font-size: .72rem;
  font-weight: 600;
  padding: .15rem .45rem;
  border-radius: var(--radius-chip);
  background: var(--surface-muted);
  color: var(--ink-soft);
}
.qbank-empty { border-radius: 16px; }
@media (max-width: 900px) {
  .qbank-layout { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  /* «Верный» остаётся в одной линии с полем; на узком экране чуть компактнее */
  .qbank-opt-row {
    flex-wrap: nowrap;
    gap: .4rem;
    padding: .3rem .35rem;
  }
  .qbank-correct {
    padding: .2rem .4rem .2rem .3rem;
    font-size: .72rem;
  }
  .qbank-correct-text { max-width: 4.2rem; overflow: hidden; text-overflow: ellipsis; }
  .qbank-num-grid { grid-template-columns: 1fr; }
}

/* curriculum breathing room under author rail */
.course-page-edit .curriculum-head {
  margin-top: .15rem;
}
.course-page-edit .modules-v3 > .module {
  border-radius: 14px;
}

/* --- Admin: system diagnostics --- */
.sys-diag-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.sys-diag-kicker {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 .25rem;
}
.sys-diag-title { margin: 0 0 .35rem; }
.sys-diag-head-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.sys-health-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
  gap: .55rem;
  margin-bottom: 1.25rem;
}
.sys-health-chip {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: .65rem .75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: .82rem;
}
.sys-health-chip.is-ok { border-color: color-mix(in srgb, var(--ok) 35%, var(--line)); }
.sys-health-chip.is-warn { border-color: color-mix(in srgb, var(--warn) 40%, var(--line)); }
.sys-health-chip .bi { font-size: 1rem; }
.sys-health-chip.is-ok .bi { color: var(--ok); }
.sys-health-chip.is-warn .bi { color: var(--warn); }
.sys-health-label { font-weight: 600; }
.sys-health-hint { font-size: .72rem; }
.sys-section { margin-bottom: 1rem; }
.sys-grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}
.sys-kv {
  display: grid;
  grid-template-columns: minmax(7rem, 11rem) 1fr;
  gap: .35rem .75rem;
  margin: 0;
  font-size: .88rem;
}
.sys-kv dt { margin: 0; color: var(--ink-soft); font-weight: 500; }
.sys-kv dd { margin: 0; word-break: break-word; }
.sys-mono { font-family: ui-monospace, Consolas, monospace; font-size: .82rem; }
.sys-subtitle { font-size: .95rem; margin: 1rem 0 .5rem; }
.sys-toggle-grid { display: grid; gap: .65rem; margin-bottom: 1rem; }
.sys-toggle {
  display: flex;
  gap: .65rem;
  align-items: flex-start;
  padding: .65rem .75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.sys-toggle-warn { border-color: color-mix(in srgb, var(--warn) 30%, var(--line)); }
.sys-toggle input { margin-top: .2rem; flex-shrink: 0; }
.sys-toggle-body { display: flex; flex-direction: column; gap: .1rem; }
.sys-field { display: block; margin-bottom: 1rem; }
.sys-field > span { display: block; font-weight: 600; margin-bottom: .35rem; }
.sys-form-actions { margin-bottom: .75rem; }
.sys-related-links { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem .75rem; }
.sys-count-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .55rem;
}
@media (min-width: 480px) {
  .sys-count-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 768px) {
  .sys-count-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}
.sys-count {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .2rem;
  min-height: 4.75rem;
  min-width: 0;
  padding: .55rem .4rem;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
}
.sys-count-n {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.1;
  flex-shrink: 0;
}
.sys-count-l {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2.4em;
  font-size: .64rem;
  line-height: 1.2;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: .03em;
  hyphens: auto;
}
.sys-env-table td, .sys-plugin-table td { vertical-align: middle; }

/* --- Diagnostics cards (admin system) — stacked single column --- */
.sys-stack-section { padding: 0; overflow: hidden; }
.sys-section-head {
  padding: 1rem 1.1rem .75rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface-muted);
}
.sys-dual-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
@media (min-width: 768px) {
  .sys-dual-row { grid-template-columns: repeat(2, 1fr); }
}
.sys-compact-card { padding: 1rem 1.1rem; }
.diag-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.diag-group { border-bottom: 1px solid var(--line); }
.diag-group:last-child { border-bottom: none; }
.diag-group-summary {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1.1rem;
  cursor: pointer;
  list-style: none;
  background: var(--surface);
}
.diag-group-summary::-webkit-details-marker { display: none; }
.diag-group-ico {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: color-mix(in srgb, var(--teal) 12%, var(--surface));
  color: var(--teal);
  flex-shrink: 0;
}
.diag-group-titles {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: .1rem;
}
.diag-group-body { padding: 0; }
.diag-row {
  padding: .75rem 1.1rem;
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: .55rem;
}
.diag-row:last-child { border-bottom: none; }
.diag-row-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem .75rem;
}
.diag-row-ico {
  width: 1.85rem;
  height: 1.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: color-mix(in srgb, var(--teal) 10%, var(--surface));
  color: var(--teal);
  flex-shrink: 0;
  font-size: .95rem;
}
.diag-row-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: .08rem;
}
.diag-row-name { font-weight: 600; font-size: .92rem; }
.diag-row-version { font-size: .78rem; font-family: ui-monospace, Consolas, monospace; }
.diag-row-msg { font-size: .78rem; }
.diag-row-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  padding-left: 2.6rem;
}
@media (max-width: 575px) {
  .diag-row-toolbar { padding-left: 0; }
  .diag-btn-text { display: none; }
  .diag-btn-group .btn { min-width: 2.25rem; padding-inline: .45rem; }
}
.diag-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  flex: 1;
}
.diag-btn-group .btn.is-loading { opacity: .65; pointer-events: none; }
.diag-row-more { margin-left: 2.6rem; font-size: .82rem; }
@media (max-width: 575px) { .diag-row-more { margin-left: 0; } }
.diag-row-more-summary {
  cursor: pointer;
  color: var(--ink-soft);
  list-style: none;
  user-select: none;
}
.diag-row-more-summary::-webkit-details-marker { display: none; }
.diag-row-more-body { padding: .45rem 0 .25rem; }
.diag-row-manual { padding-left: 2.6rem; }
.diag-action-log {
  margin: 0 0 0 2.6rem;
  padding: .45rem .65rem;
  border-radius: 6px;
  background: var(--surface-muted);
  font-size: .72rem;
  font-family: ui-monospace, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 10rem;
  overflow: auto;
}
@media (max-width: 575px) {
  .diag-action-log, .diag-row-manual { margin-left: 0; padding-left: 0; }
}
.diag-manual-install {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
  max-width: 100%;
}
.diag-cmd-inline {
  display: inline-block;
  padding: .2rem .45rem;
  border-radius: 6px;
  background: var(--surface-muted);
  font-size: .76rem;
  max-width: 100%;
  overflow-x: auto;
}
.diag-copy-btn { flex-shrink: 0; }
.diag-row-toolbar--compact { padding-left: 0; margin-top: .35rem; }
.diag-row-toolbar--compact .diag-btn-group { flex: unset; }
.plugin-runtime-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem .55rem;
  margin-top: .35rem;
}
.plugin-runtime-mini {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
}
.plugin-card-actions { margin-top: .45rem; }
.diag-log-expand {
  margin: .35rem 0 0 2.6rem;
  font-size: .78rem;
}
.diag-log-expand summary {
  cursor: pointer;
  color: var(--ink-soft);
  user-select: none;
}
.diag-action-log--expanded { margin: .35rem 0 0; max-height: 14rem; }
.diag-toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 1200;
  max-width: min(24rem, calc(100vw - 2rem));
  padding: .65rem .85rem;
  border-radius: 8px;
  font-size: .85rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
  opacity: 0;
  transform: translateY(.5rem);
  transition: opacity .25s ease, transform .25s ease;
  pointer-events: none;
}
.diag-toast.is-visible { opacity: 1; transform: translateY(0); }
.diag-toast--ok { background: #ecfdf3; color: #166534; border: 1px solid #86efac; }
.diag-toast--err { background: #fef2f2; color: #991b1b; border: 1px solid #fca5a5; }
@media (max-width: 575px) {
  .diag-log-expand { margin-left: 0; }
}
.smtp-diag-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .75rem;
  padding: .75rem 1.1rem;
  border-bottom: 1px solid var(--line);
}
.smtp-last-test { padding: 0 1.1rem; margin-top: -.25rem; }
.smtp-form { padding: 1rem 1.1rem 0; }
.smtp-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 .75rem;
}
@media (min-width: 640px) {
  .smtp-fields { grid-template-columns: repeat(2, 1fr); }
}
.smtp-field-check { grid-column: 1 / -1; }
.smtp-tls-toggle { margin: 0; border: none; padding: 0; }
.smtp-test-form { padding: .5rem 1.1rem 1rem; border-top: 1px solid var(--line); margin-top: .5rem; }
.smtp-test-row {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: stretch;
}
.smtp-test-row .form-control { flex: 1; min-width: 12rem; }
.smtp-test-row .btn { align-self: stretch; }
.diag-item-actions .btn { min-height: 2rem; }
.diag-card { padding: 0; overflow: hidden; }
.diag-card-head {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface-muted);
}
.diag-card-ico {
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: color-mix(in srgb, var(--teal) 12%, var(--surface));
  color: var(--teal);
  flex-shrink: 0;
}
.diag-card-titles { flex: 1; min-width: 0; }
.diag-card-title { margin: 0 0 .2rem; font-size: 1.05rem; }
.diag-badge {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  font-size: .72rem;
  font-weight: 700;
  padding: .2rem .5rem;
  border-radius: 999px;
  white-space: nowrap;
}
.diag-badge--ok { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.diag-badge--warn { background: color-mix(in srgb, var(--warn) 15%, transparent); color: var(--warn); }
.diag-badge--err { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); }
.diag-badge--idle { background: var(--surface); color: var(--ink-soft); }
.diag-runner-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .75rem;
  padding: .75rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.diag-runner-main { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; flex: 1; }
.diag-items { padding: .35rem 0; }
.diag-item { border-bottom: 1px solid var(--line); }
.diag-item:last-child { border-bottom: none; }
.diag-item-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .65rem 1.1rem;
  cursor: pointer;
  list-style: none;
}
.diag-item-summary::-webkit-details-marker { display: none; }
.diag-item-label { font-weight: 600; font-size: .9rem; }
.diag-item-body { padding: 0 1.1rem .85rem; }
.diag-kv {
  display: grid;
  grid-template-columns: minmax(5.5rem, 8rem) 1fr;
  gap: .3rem .65rem;
  margin: 0 0 .65rem;
  font-size: .84rem;
}
.diag-kv dt { margin: 0; color: var(--ink-soft); }
.diag-kv dd { margin: 0; word-break: break-word; }
.diag-cmd {
  display: block;
  padding: .35rem .5rem;
  border-radius: 6px;
  background: var(--surface-muted);
  font-size: .78rem;
  white-space: pre-wrap;
  word-break: break-all;
}
.diag-item-actions { display: flex; flex-wrap: wrap; gap: .4rem; }
.diag-auto-hint { margin: -.5rem 0 1.25rem; }
.plugin-diag-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.25rem;
  margin-top: .35rem;
  padding: .35rem .75rem;
  font-size: .8rem;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}
.plugin-diag-btn:hover,
.plugin-diag-btn:focus,
.plugin-diag-btn:active {
  text-decoration: none;
}
.plugin-card-head .plugin-diag-btn { align-self: flex-start; }

.maintenance-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}
.maintenance-card { max-width: 28rem; text-align: center; padding: 2rem 1.5rem; }
.maintenance-icon { font-size: 2.5rem; color: var(--teal); margin-bottom: .75rem; }
.maintenance-msg { font-size: 1.05rem; margin-bottom: 1rem; }

/* --- Personal page layout constructor --- */
.layout-studio-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.layout-studio-head-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.layout-presets { margin-bottom: 1.25rem; }
.layout-templates { margin-bottom: 1.25rem; padding: 1rem; }
.layout-templates-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
  margin-bottom: .65rem;
}
.layout-template-scope {
  display: flex;
  align-items: center;
  gap: .45rem;
  margin: 0;
}
.layout-page-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-bottom: .65rem;
}
.layout-page-tab {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-chip);
  background: var(--surface);
  padding: .35rem .65rem;
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
}
.layout-page-tab.is-active {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
}
.layout-page-hint { margin-bottom: 1rem; }
.layout-preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
  gap: .55rem;
}
.layout-preset-card {
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: .65rem .75rem;
  background: var(--surface);
  cursor: pointer;
  display: grid;
  gap: .15rem;
}
.layout-preset-card:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 5%, var(--surface)); }
.layout-preset-icon {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-chip);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
  color: var(--accent-strong);
  margin-bottom: .15rem;
}
.layout-preset-apply { opacity: .75; }
.layout-preset-card strong { display: block; margin-bottom: .2rem; }
.layout-zones { display: grid; gap: 1rem; }
.layout-zone { padding: 1rem; }
.panel-soft {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
}
.layout-zone-title { margin: 0 0 .25rem; font-size: 1rem; }
.layout-zone-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: .75rem 0 .35rem;
}
.layout-item-list, .layout-hidden-list, .layout-block-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .35rem;
  min-height: 2rem;
}
.layout-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .45rem .55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.layout-row.is-dragging { opacity: .55; }
.layout-row.is-drop-target { outline: 2px dashed var(--accent); }
.layout-drag { color: var(--ink-soft); cursor: grab; }
.layout-row-body { display: flex; align-items: center; gap: .45rem; flex: 1; min-width: 0; }
.layout-row-label { font-weight: 600; }
.layout-row-actions { display: flex; gap: .15rem; }
.layout-row-btn {
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  padding: .15rem .35rem;
  border-radius: var(--radius-chip);
  cursor: pointer;
}
.layout-row-btn:hover { background: var(--surface-muted); color: var(--accent); }
.layout-block-toggle {
  display: flex;
  align-items: flex-start;
  gap: .55rem;
  flex: 1;
  cursor: pointer;
  margin: 0;
}
.layout-block-toggle small { display: block; }
.layout-palette-btns { display: flex; flex-wrap: wrap; gap: .35rem; }
.layout-studio-footer { margin-top: 1rem; }
.layout-studio-actions { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.layout-save-status.is-ok { color: var(--ok); }
.layout-save-status.is-err { color: var(--danger); }
.layout-live-dock {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(4.5rem + env(safe-area-inset-bottom, 0px));
  z-index: 1100;
  max-width: min(36rem, calc(100vw - 1.5rem));
  box-shadow: var(--shadow-lg, 0 8px 28px rgba(0,0,0,.15));
  background: var(--panel, #fff);
}
.layout-live-dock[hidden] { display: none !important; }
.layout-live-dock-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .65rem .85rem;
}
.layout-live-dock-actions { display: flex; flex-wrap: wrap; gap: .35rem; align-items: center; }
body.layout-live-edit [data-layout-zone].layout-zone-editable {
  outline: 2px dashed color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}
body.layout-live-edit [data-layout-item] { cursor: grab; }
body.layout-live-edit [data-layout-item].is-dragging { opacity: .5; }
body.layout-live-edit [data-layout-block].layout-block-editable {
  cursor: pointer;
  position: relative;
}
body.layout-live-edit [data-layout-block].layout-block-editable::after {
  content: 'Нажмите, чтобы скрыть';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding: .35rem .5rem;
  font-size: .72rem;
  font-weight: 600;
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  pointer-events: none;
  border-radius: inherit;
}
body.layout-live-edit [data-layout-block].layout-block-hidden {
  display: none !important;
}

/* --- Detailed hints & learning coaches --- */
html.show-detailed-hints .btn-hint-detail,
html.show-detailed-hints [data-hint-detail]::after,
html.ui-density-simple .btn-hint-detail,
html.ui-density-simple [data-hint-detail]::after {
  display: block;
}
.btn-hint-detail {
  display: none;
  width: 100%;
  font-size: .72rem;
  font-weight: 500;
  color: var(--ink-soft);
  margin-top: .15rem;
  line-height: 1.25;
}
.has-btn-hint {
  flex-direction: column;
  align-items: flex-start;
}
html.show-detailed-hints [data-hint-detail],
html.ui-density-simple [data-hint-detail] {
  position: relative;
}
html.show-detailed-hints .app-side-nav a::after,
html.ui-density-simple .app-side-nav a::after {
  content: attr(data-hint-detail);
  display: none;
}
.learn-coach {
  margin-bottom: 1rem;
  border-left: 3px solid var(--teal);
}
.learn-coach-head {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .5rem;
}
.learn-coach-head .bi { color: var(--teal); font-size: 1.1rem; }
.learn-coach-list {
  margin: 0;
  padding-left: 1.15rem;
  font-size: .92rem;
}
.learn-coach-list li { margin-bottom: .35rem; }
.due-field { margin: .75rem 0; padding: .65rem .75rem; }
.due-field-toggle { margin-bottom: .5rem; }
.due-field-input input { max-width: 18rem; }