@charset "UTF-8";
/* ════════════════════════════════════════════════════════════════════
   US YOUTUBE ACADEMY — Премиальная обучающая платформа
   Тёмная тема, фиолетово-розовый акцент, glassmorphism
   ════════════════════════════════════════════════════════════════════ */

:root {
  /* ═══ YOUTUBE NATIVE — TЁMНАЯ ТЕМА (по умолчанию) ═══
     Палитра: уголь / off-white. Акцент: YouTube red как штамп.
     Никаких градиентов на UI. Никаких glassmorphism. */
  color-scheme: dark;

  /* Поверхности — глубокий уголь с лёгкой синевой (как VibeLab) */
  --bg-0: #08080b;
  --bg-1: #0f0f14;
  --bg-2: #16161d;
  --bg-3: #1e1e26;
  --bg-card: #0f0f14;
  --bg-card-hover: #16161d;
  --bg-glass: rgba(8, 8, 11, 0.7);
  --bg-glass-strong: rgba(8, 8, 11, 0.85);
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* Радиальные подсветки фона */
  --radial-1: rgba(37, 99, 235, 0.07);
  --radial-2: rgba(29, 78, 216, 0.05);

  /* Бордеры — hairline */
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-soft: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.22);

  /* Текст */
  --text-1: #fafafa;
  --text-2: #b8b8b8;
  --text-3: #8a8a8a;
  --text-4: #5a5a5a;

  /* Highlights */
  --hi-1: rgba(255, 255, 255, 0.03);
  --hi-2: rgba(255, 255, 255, 0.05);
  --hi-3: rgba(255, 255, 255, 0.07);
  --hi-strong: rgba(255, 255, 255, 0.18);

  /* Text-gradient для слова-акцента в hero */
  --text-gradient: linear-gradient(135deg, #60a5fa 0%, #2563eb 35%, #1d4ed8 100%);

  /* ─── АКЦЕНТ: Blue (тест) ─── */
  --accent: #2563eb;
  --accent-2: #1d4ed8;
  --accent-soft: #60a5fa;
  --accent-hover: #3b82f6;
  --accent-glow: rgba(37, 99, 235, 0.4);
  --accent-glow-soft: rgba(37, 99, 235, 0.15);
  --gradient-accent: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  --gradient-accent-soft: linear-gradient(135deg, rgba(37, 99, 235, 0.12) 0%, rgba(29, 78, 216, 0.08) 100%);
  --signal-green: #10b981;

  /* Тематические цвета модулей — приглушённый монохром
     для редакционного стиля; модули отличаются только номером */
  --c-violet: #fafafa;
  --c-blue: #fafafa;
  --c-green: #fafafa;
  --c-orange: #fafafa;
  --c-pink: #fafafa;
  --c-cyan: #fafafa;
  --c-red: #ff0033;
  --c-amber: #fafafa;

  /* Геометрия — острая, журнальная */
  --r-sm: 2px;
  --r-md: 4px;
  --r-lg: 4px;
  --r-xl: 4px;

  /* Сетка */
  --sidebar-w: 260px;
  --topbar-h: 60px;
  --content-max: 760px;

  /* Тени — плоские, без эффектов */
  --shadow-card: none;
  --shadow-elevated: 0 30px 80px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 0 2px var(--accent);

  /* Шрифты */
  --font-display: 'Inter Tight', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
}

/* ─── СВЕТЛАЯ ТЕМА ─── */
[data-theme="light"] {
  color-scheme: light;

  --bg-0: #fafaf7;
  --bg-1: #ffffff;
  --bg-2: #f3f3ee;
  --bg-3: #ebebe5;
  --bg-card: #ffffff;
  --bg-card-hover: #f8f8f3;
  --bg-glass: rgba(250, 250, 247, 0.8);
  --bg-glass-strong: rgba(250, 250, 247, 0.92);
  --bg-overlay: rgba(255, 255, 255, 0.5);

  --radial-1: rgba(37, 99, 235, 0.07);
  --radial-2: rgba(29, 78, 216, 0.05);

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-soft: rgba(0, 0, 0, 0.14);
  --border-strong: rgba(0, 0, 0, 0.28);

  --text-1: #0a0a0a;
  --text-2: #3a3a3a;
  --text-3: #6a6a6a;
  --text-4: #9a9a9a;

  --hi-1: rgba(0, 0, 0, 0.03);
  --hi-2: rgba(0, 0, 0, 0.05);
  --hi-3: rgba(0, 0, 0, 0.07);
  --hi-strong: rgba(255, 255, 255, 0.5);

  --c-violet: #0a0a0a;
  --c-blue: #0a0a0a;
  --c-green: #0a0a0a;
  --c-orange: #0a0a0a;
  --c-pink: #0a0a0a;
  --c-cyan: #0a0a0a;
  --c-red: var(--accent);
  --c-amber: #0a0a0a;

  --shadow-elevated: 0 30px 80px rgba(0, 0, 0, 0.12);
}

/* ═══ RESET ═══ */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg-0);
  color: var(--text-1);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  font-feature-settings: 'ss01', 'cv02', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

h1, h2, h3, .display { font-family: var(--font-display); font-weight: 800; letter-spacing: -0.02em; }
.mono, .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* Защита от горизонтального overflow длинными словами/URL — мягкий перенос */
.hero-title, .mh-title, .lh-title, .mc-title, .lc-title,
.lesson-content h3, .lesson-content p, .lesson-content li,
.l-card-title, .l-card-text, .l-callout-title, .l-callout-text,
.l-result-text, .breadcrumbs .crumb-current, .lc-summary,
.lnc-title, .checklist-text {
  overflow-wrap: break-word;
  word-wrap: break-word;
  min-width: 0;
}
/* Длинные слова и URL ломаются только если уж совсем не помещаются */
.hero-title, .lh-title, .mh-title { hyphens: auto; -webkit-hyphens: auto; }

body {
  background:
    radial-gradient(ellipse 1200px 600px at 50% -300px, var(--radial-1), transparent 70%),
    radial-gradient(ellipse 1000px 500px at 100% 100%, var(--radial-2), transparent 70%),
    var(--bg-0);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.2s ease;
}

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img, svg { display: block; max-width: 100%; }

::selection { background: var(--accent); color: white; }

/* ═══ SCROLLBAR ═══ */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 6px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-4); background-clip: padding-box; }

/* ════════════════════════════════════════════════════════════════════
   LAYOUT
   ════════════════════════════════════════════════════════════════════ */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
  max-width: 100vw;
}
.main { min-width: 0; }
.page { min-width: 0; max-width: 100%; }
.page-wrap, .lesson-wrap { min-width: 0; max-width: 100%; }

/* ═══ SIDEBAR ═══ */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--border-subtle);
  background: var(--bg-0);
  display: flex;
  flex-direction: column;
  z-index: 50;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.brand {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--gradient-accent);
  display: grid;
  place-items: center;
  color: white;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: -0.03em;
  position: relative;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-family: var(--font-display); font-size: 13px; font-weight: 800; letter-spacing: 0.02em; text-transform: uppercase; }
.brand-sub { font-family: var(--font-mono); font-size: 10px; color: var(--text-3); margin-top: 4px; letter-spacing: 0.05em; text-transform: uppercase; }

.sidebar-search {
  padding: 14px 16px 6px;
  position: relative;
}
.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0 8px 0 30px;
  transition: border-color 0.15s, background 0.15s;
}
.search-input-wrap:focus-within {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}
.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-4);
  display: inline-flex;
  pointer-events: none;
}
.sidebar-search input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 8px 0;
  color: var(--text-1);
  font-family: var(--font-body);
  font-size: 13px;
  outline: none;
  min-width: 0;
}
.sidebar-search input::placeholder { color: var(--text-4); }
.search-clear {
  display: none;
  background: transparent;
  border: 0;
  color: var(--text-3);
  font-size: 18px;
  line-height: 1;
  padding: 0 4px;
  cursor: pointer;
  border-radius: 4px;
}
.search-clear:hover { background: var(--bg-card-hover); color: var(--text-1); }
.sidebar-search.has-query .search-clear { display: inline-flex; align-items: center; }

.search-results {
  position: absolute;
  top: calc(100% - 2px);
  left: 16px;
  right: 16px;
  z-index: 50;
  max-height: 360px;
  overflow-y: auto;
  background: var(--bg-1);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.search-results[hidden] { display: none; }
.search-result {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  background: transparent;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-2);
}
.search-result.active { background: var(--bg-card-hover); color: var(--text-1); }
.search-result mark {
  background: transparent;
  color: var(--accent);
  padding: 0;
  border-radius: 0;
  font-weight: 700;
}
.sr-title { font-size: 13px; font-weight: 600; color: var(--text-1); line-height: 1.3; }
.sr-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-4);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 4px;
}
.search-empty {
  padding: 14px 10px;
  font-size: 12.5px;
  color: var(--text-3);
  text-align: center;
}

.nav-item-pinned {
  margin: 4px 4px 12px !important;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle) !important;
  border-radius: 10px !important;
}
.nav-item-pinned.active {
  background: var(--accent-glow-soft);
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}

.nav-section {
  padding: 14px 12px 4px;
  flex: 1;
  overflow-y: auto;
}
.nav-section + .nav-section { padding-top: 8px; }
.nav-label {
  padding: 6px 12px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  margin-bottom: 4px;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  text-align: left;
  position: relative;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: inset 0 1px 0 var(--hi-1, rgba(255, 255, 255, 0.04));
}
.nav-item:last-child { margin-bottom: 0; }
.nav-item:hover {
  color: var(--text-1);
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}
.nav-item.active {
  color: var(--text-1);
  background: var(--bg-card-hover);
  border-color: var(--accent);
  font-weight: 600;
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  width: 22px;
  text-align: left;
  color: var(--text-4);
  font-variant-numeric: tabular-nums;
}
.nav-item.active .nav-num { color: var(--accent); }

.nav-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.6;
}
.nav-icon-wrap {
  width: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  color: var(--text-3);
}
.nav-icon-wrap svg { width: 16px; height: 16px; }
.nav-item:hover .nav-icon-wrap, .nav-item.active .nav-icon-wrap { color: var(--text-1); }

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--border-subtle);
  background: transparent;
}

.progress-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
}
.progress-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.progress-title { font-family: var(--font-mono); font-size: 10px; font-weight: 600; color: var(--text-3); letter-spacing: 0.1em; text-transform: uppercase; }
.progress-percent { font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--text-1); font-variant-numeric: tabular-nums; }
.progress-bar {
  height: 3px;
  background: var(--border-soft);
  border-radius: 0;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 0;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.progress-meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

/* ════════════════════════════════════════════════════════════════════
   MAIN
   ════════════════════════════════════════════════════════════════════ */
.main { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  position: sticky;
  top: 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  background: var(--bg-0);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 40;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  min-width: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.breadcrumbs a { color: var(--text-3); cursor: pointer; transition: color 0.15s; white-space: nowrap; }
.breadcrumbs a:hover { color: var(--text-1); }
.breadcrumbs .crumb-current { color: var(--text-1); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.crumb-sep { color: var(--text-4); }

.topbar-actions { display: flex; align-items: center; gap: 6px; }

.tb-btn {
  height: 34px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--r-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-2);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.12s;
}
.tb-btn:hover { color: var(--text-1); background: var(--bg-card-hover); }
.tb-btn.tb-icon { width: 34px; padding: 0; justify-content: center; }

.tb-avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--gradient-accent);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  color: white;
  margin-left: 4px;
  box-shadow: 0 4px 12px var(--accent-glow);
  border: 0;
  cursor: pointer;
  transition: transform 0.15s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
}
.tb-avatar:hover { transform: scale(1.06); box-shadow: 0 6px 18px var(--accent-glow); }

/* ════════════════════════════════════════════════════════════════════
   PAGE
   ════════════════════════════════════════════════════════════════════ */
.page {
  padding: 0;
  flex: 1;
  animation: fadeIn 0.35s ease;
}

/* ─── REVEAL ANIMATIONS (Linear-style) ─── */
[data-reveal] { opacity: 0; }
[data-reveal].revealed {
  animation: revealUp 0.75s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes revealUp {
  0%   { opacity: 0; transform: translateY(28px); }
  100% { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; }
  [data-reveal].revealed { animation: none; }
}
.page-wrap { padding: 0 48px 80px; }
.lesson-wrap { padding: 56px 48px 80px; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-wrap { max-width: 1180px; margin: 0 auto; }
.lesson-wrap { max-width: var(--content-max); margin: 0 auto; }

/* ═══ HERO (главная) ═══ */
.hero {
  position: relative;
  padding: 56px 48px 72px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 0;
  overflow: visible;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 60px;
  align-items: center;
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}
.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -10%;
  width: 720px;
  height: 720px;
  background: radial-gradient(circle at center, var(--accent-glow-soft), transparent 60%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero-copy { display: flex; flex-direction: column; }

.hero-eyebrow {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 28px;
  width: max-content;
  max-width: 100%;
}
.hero-eyebrow::before { display: none; }
.hero-eyebrow-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal-green);
  box-shadow: 0 0 10px var(--signal-green);
  animation: pulseDot 2s infinite;
}
@keyframes pulseDot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.hero-title {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(46px, 5.5vw, 80px);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1;
  max-width: 14ch;
  margin-bottom: 24px;
  color: var(--text-1);
  background: none;
  -webkit-text-fill-color: currentColor;
  text-wrap: balance;
}
.hero-title em {
  font-style: normal;
  font-weight: 800;
  background: var(--text-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  position: relative;
  font-family: var(--font-body);
  font-size: 17px;
  color: var(--text-2);
  max-width: 48ch;
  margin-bottom: 36px;
  line-height: 1.55;
  font-weight: 400;
}

.hero-actions { position: relative; display: flex; gap: 12px; align-items: stretch; flex-wrap: wrap; }
.hero-actions > * + * { margin-left: 0; }

/* ─── HERO VISUAL (mock YouTube Studio) ─── */
.hero-visual {
  position: relative;
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 0;
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.35),
    0 0 0 1px var(--hi-1) inset,
    0 0 80px var(--accent-glow-soft);
  overflow: hidden;
}
.hv-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-2);
}
.hv-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--bg-3); }
.hv-dot:nth-child(1) { background: #ff5f56; }
.hv-dot:nth-child(2) { background: #ffbd2e; }
.hv-dot:nth-child(3) { background: #28c93f; }
.hv-bar-title {
  margin-left: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-3);
}
.hv-body { padding: 22px 24px 26px; }
.hv-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 22px; }
.hv-stat { padding: 14px 0; }
.hv-stat-lbl {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.hv-stat-num {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
}
.hv-stat-delta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--signal-green);
  margin-left: 6px;
}
.hv-stat-delta.neg { color: var(--accent); }
.hv-chart {
  position: relative;
  height: 120px;
  margin: 8px -8px -8px;
  border-radius: 6px;
  overflow: hidden;
}
.hv-chart svg { width: 100%; height: 100%; display: block; }
.hv-foot {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-4);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.hv-foot span:last-child { color: var(--accent); }

@media (max-width: 1100px) {
  .hero { grid-template-columns: 1fr; gap: 36px; padding: 36px 0 48px; }
  .hero-visual { max-width: 580px; }
}

.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 50px;
  padding: 0 22px;
  background: var(--gradient-accent);
  color: white;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
  text-transform: none;
  border-radius: 10px;
  border: 1px solid var(--accent);
  box-shadow: 0 10px 32px var(--accent-glow), 0 1px 0 var(--hi-strong) inset;
  transition: transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease;
  will-change: transform;
}
.btn-primary:hover { box-shadow: 0 16px 40px var(--accent-glow), 0 1px 0 var(--hi-strong) inset; background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.97) !important; }
.btn-primary .btn-arrow { transition: transform 0.18s ease; display: inline-block; }
.btn-primary:hover .btn-arrow { transform: translateX(6px); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 50px;
  padding: 0 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  color: var(--text-1);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  text-transform: none;
  border-radius: 10px;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.btn-ghost:hover { background: var(--bg-card-hover); border-color: var(--border-strong); }

.hero-stats-wrap {
  border-bottom: 1px solid var(--border-subtle);
  padding: 28px 48px 36px;
  margin: 0 auto 48px;
  max-width: 1180px;
}
.hero-stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: none;
}
.hero-stats > div {
  padding: 0 28px;
  border-right: 1px solid var(--border-subtle);
}
.hero-stats > div:first-child { padding-left: 0; }
.hero-stats > div:last-child { padding-right: 0; border-right: none; }
.hero-stat-num {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-1);
  background: none;
  -webkit-text-fill-color: currentColor;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.hero-stat-lbl {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-3);
  margin-top: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ═══ SECTION HEADERS ═══ */
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}
.section-title {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-1);
}
.section-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  margin-top: 6px;
  letter-spacing: 0.05em;
}

/* ═══ MODULES GRID — editorial tiles ═══ */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--border-subtle);
  border-left: 1px solid var(--border-subtle);
}

.module-card {
  position: relative;
  padding: 32px 32px 28px;
  background: var(--bg-0);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  border-radius: 0;
  cursor: pointer;
  transition: background-color 0.25s ease, transform 0.25s ease, box-shadow 0.3s ease;
  overflow: hidden;
  text-align: left;
  display: flex;
  flex-direction: column;
  min-height: 220px;
  z-index: 1;
}
.module-card::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
  opacity: 1;
  z-index: 2;
}
.module-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3), 0 0 60px var(--accent-glow-soft);
  z-index: 3;
}
.module-card:hover::before { transform: scaleY(1); }
.module-card::after {
  content: "\2192";
  position: absolute;
  top: 28px;
  right: 28px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--text-4);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.2s ease;
}
.module-card:hover::after { color: var(--accent); transform: translateX(6px); }

.mc-top { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 24px; padding-right: 32px; }
.mc-icon { display: none; }
.mc-num {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 900;
  color: var(--text-1);
  letter-spacing: -0.05em;
  line-height: 0.85;
  font-variant-numeric: tabular-nums;
  transition: all 0.3s ease;
  background: none;
  -webkit-text-fill-color: currentColor;
}
.module-card:hover .mc-num {
  background: var(--text-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.mc-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.mc-title {
  position: relative;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 10px;
  color: var(--text-1);
}
.mc-sub {
  position: relative;
  font-family: var(--font-body);
  font-size: 14.5px;
  color: var(--text-3);
  line-height: 1.5;
  flex: 1;
}
.mc-foot {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}
.mc-lessons {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.mc-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.04em;
}
.mc-progress-bar {
  width: 64px;
  height: 3px;
  background: var(--border-soft);
  border-radius: 0;
  overflow: hidden;
}
.mc-progress-bar-fill { height: 100%; background: var(--accent); border-radius: 0; transition: width 0.4s; }

/* ═══ SERVICE GRID — простые строки ═══ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--border-subtle);
  border-left: 1px solid var(--border-subtle);
}
.service-card {
  padding: 22px 24px;
  background: transparent;
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  border-radius: 0;
  cursor: pointer;
  transition: background-color 0.18s;
  display: flex;
  align-items: center;
  gap: 18px;
}
.service-card:hover { background: var(--bg-card-hover); transform: none; }
.sc-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--text-3);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border: 1px solid var(--border-soft);
}
.service-card:hover .sc-icon { color: var(--text-1); border-color: var(--text-1); }
.sc-text { min-width: 0; }
.sc-title { font-family: var(--font-display); font-size: 15px; font-weight: 700; margin-bottom: 4px; letter-spacing: -0.01em; }
.sc-desc { font-family: var(--font-body); font-size: 13px; color: var(--text-3); line-height: 1.45; }

/* ════════════════════════════════════════════════════════════════════
   MODULE PAGE
   ════════════════════════════════════════════════════════════════════ */
.module-header {
  padding: 60px 0 36px;
  border-bottom: 1px solid var(--border-subtle);
  background: transparent;
  margin-bottom: 0;
  position: relative;
  overflow: visible;
  border-radius: 0;
}
.module-header::before { display: none; }

.mh-top { display: flex; flex-direction: column; gap: 14px; margin-bottom: 16px; position: relative; }
.mh-icon, .mh-num { display: none; }
.mh-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}
.mh-eyebrow-tag {
  color: var(--text-1);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 4px 9px;
  border-radius: 6px;
  letter-spacing: 0.08em;
}
.mh-eyebrow-dot { color: var(--text-4); }
.mh-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--text-1);
}
.mh-sub {
  position: relative;
  font-family: var(--font-body);
  font-size: 17px;
  color: var(--text-2);
  margin-top: 18px;
  max-width: 60ch;
  line-height: 1.5;
}
.mh-meta {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}
.mh-meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 24px;
  border-right: 1px solid var(--border-subtle);
}
.mh-meta-item:first-child { padding-left: 0; }
.mh-meta-item:last-child { padding-right: 0; border-right: none; }
.mh-meta-num {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.mh-meta-lbl {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lessons-list { display: flex; flex-direction: column; gap: 0; margin-top: 40px; border-top: 1px solid var(--border-subtle); position: relative; }

.lesson-card {
  position: relative;
  padding: 24px 24px 24px 64px;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-subtle);
  border-radius: 0;
  cursor: pointer;
  transition: background-color 0.15s ease;
  display: flex;
  align-items: center;
  gap: 18px;
  text-align: left;
  margin: 0 -24px 0 -20px;
}
.lesson-card:last-child { border-bottom: none; }
/* Timeline line segment per card */
.lesson-card::before {
  content: '';
  position: absolute;
  left: 38px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-image: linear-gradient(to bottom, var(--border-strong) 50%, transparent 50%);
  background-size: 2px 6px;
  background-repeat: repeat-y;
  z-index: 0;
}
.lesson-card.done::before {
  background-image: none;
  background-color: var(--accent);
}
/* Edges: shorten line above first and below last card so it doesn't dangle */
.lesson-card:first-child::before { top: 24px; }
.lesson-card:last-child::before { bottom: calc(100% - 48px); }

.lesson-card:hover { background: var(--bg-card-hover); }
.lesson-card:hover .lc-title { color: var(--accent); }

/* The node — repurposed .lc-num as circle */
.lc-num {
  position: relative;
  z-index: 2;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-0);
  border: 2px solid var(--border-strong);
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
  margin-left: -39px;  /* sit on the timeline line */
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.lesson-card:hover .lc-num {
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.06);
}
/* Done — filled orange with ✓ */
.lesson-card.done .lc-num {
  background: var(--accent);
  border-color: var(--accent);
  color: transparent;
  font-size: 0;
  box-shadow: none;
}
.lesson-card.done .lc-num::before {
  content: "\2713";
  color: white;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-display);
}
/* Current (next undone) — pulsing orange ring */
.lesson-card.current .lc-num {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-0);
  animation: lcNodePulse 2.4s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}
@keyframes lcNodePulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { box-shadow: 0 0 0 8px transparent; }
}
@media (prefers-reduced-motion: reduce) {
  .lesson-card.current .lc-num { animation: none; box-shadow: 0 0 0 3px var(--accent-glow); }
}
.lc-info { flex: 1; min-width: 0; }
.lc-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 6px;
  letter-spacing: -0.02em;
  line-height: 1.15;
  transition: color 0.18s;
}
.lc-summary { font-family: var(--font-body); font-size: 14px; color: var(--text-3); line-height: 1.45; }
.lc-meta { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
.lc-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 4px 8px;
  background: transparent;
  border: 1px solid var(--border-soft);
  border-radius: var(--r-sm);
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
/* Цветовое кодирование уровней — приглушённо, через цвет, без fill */
.lc-pill[data-level="Старт"]        { color: #5db075; border-color: #5db075; }
.lc-pill[data-level="База"]         { color: #5b8def; border-color: #5b8def; }
.lc-pill[data-level="Продвинутый"]  { color: var(--accent); border-color: var(--accent); }
.lc-pill[data-level="Ниша"]         { color: #d99852; border-color: #d99852; }
.lc-pill[data-level="Инструменты"]  { color: #4cb5b5; border-color: #4cb5b5; }
.lc-pill[data-level="Ошибка"]       { color: var(--accent); border-color: var(--accent); }
.lc-pill[data-level="Скоро"]        { color: var(--text-4); border-color: var(--text-4); }
.lc-arrow {
  color: var(--text-4);
  transition: color 0.15s, transform 0.15s;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  margin-left: 4px;
}
.lc-arrow svg { display: none; }
.lc-arrow::after { content: '→'; }
.lesson-card:hover .lc-arrow { color: var(--accent); transform: translateX(4px); }

/* ════════════════════════════════════════════════════════════════════
   LESSON PAGE
   ════════════════════════════════════════════════════════════════════ */
.lesson-header { margin-bottom: 48px; padding-bottom: 32px; border-bottom: 1px solid var(--border-subtle); }
.lh-meta { display: flex; gap: 14px; align-items: center; margin-bottom: 24px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 11px; color: var(--text-3); letter-spacing: 0.06em; text-transform: uppercase; }
.lh-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1;
  margin-bottom: 20px;
  color: var(--text-1);
}
.lh-summary { font-family: var(--font-body); font-size: 19px; color: var(--text-2); line-height: 1.5; max-width: 60ch; }

.lesson-content { font-family: var(--font-body); font-size: 17px; line-height: 1.7; color: var(--text-2); }
.lesson-content > * + * { margin-top: 20px; }

.lesson-content h3 {
  font-family: var(--font-display);
  color: var(--text-1);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-top: 40px;
  margin-bottom: -4px;
}

.lesson-content p { font-size: 16px; line-height: 1.7; color: var(--text-2); }

.lesson-content .l-list, .lesson-content .l-ol {
  padding-left: 4px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lesson-content .l-list li, .lesson-content .l-ol li {
  position: relative;
  padding-left: 26px;
  font-size: 15.5px;
  color: var(--text-2);
}
.lesson-content .l-list li::before {
  content: "\2014";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 600;
  box-shadow: none;
  background: none;
  width: auto;
  height: auto;
  border-radius: 0;
}
.lesson-content .l-ol { counter-reset: l-ol; }
.lesson-content .l-ol li { counter-increment: l-ol; padding-left: 32px; }
.lesson-content .l-ol li::before {
  content: counter(l-ol, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: transparent;
  border: none;
  width: auto;
  height: auto;
  border-radius: 0;
  display: block;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.lesson-content .l-callout {
  display: block;
  padding: 22px 24px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent);
  border-radius: 0;
  position: relative;
}
.lesson-content .l-callout-icon { display: none; }
.lesson-content .l-callout-title { font-family: var(--font-mono); font-size: 10.5px; font-weight: 700; color: var(--accent); margin-bottom: 8px; letter-spacing: 0.1em; text-transform: uppercase; }
.lesson-content .l-callout-text { font-family: var(--font-body); font-size: 15.5px; color: var(--text-1); line-height: 1.55; }

.lesson-content .l-card {
  padding: 22px 24px;
  background: var(--bg-1);
  border: 1px solid var(--border-subtle);
  border-radius: 0;
  position: relative;
  overflow: hidden;
}
.lesson-content .l-card::before { display: none; }
.lesson-content .l-card-title { font-family: var(--font-display); font-size: 16px; font-weight: 800; color: var(--text-1); margin-bottom: 8px; letter-spacing: -0.01em; }
.lesson-content .l-card-text { font-family: var(--font-body); font-size: 14.5px; color: var(--text-2); line-height: 1.55; }

.lesson-content .l-result {
  display: block;
  padding: 26px 28px;
  background: var(--text-1);
  color: var(--bg-0);
  border: none;
  border-radius: 0;
  margin-top: 32px;
}
.lesson-content .l-result-icon { display: none; }
.lesson-content .l-result-text { font-family: var(--font-body); font-size: 16px; color: inherit; line-height: 1.55; padding-top: 0; }
.lesson-content .l-result-text strong { color: var(--accent); font-family: var(--font-mono); font-size: 11px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; display: block; margin-bottom: 8px; }

.lesson-content table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  border-spacing: 0;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.lesson-content table thead, .lesson-content table tbody { display: table; width: 100%; min-width: 460px; }
.lesson-content th {
  text-align: left;
  padding: 14px 18px;
  background: transparent;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-3);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-strong);
}
.lesson-content td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-1);
  vertical-align: top;
}
.lesson-content tr:last-child td { border-bottom: none; }

/* ═══ CHECKLIST — редакционный «to-do» ═══ */
.checklist {
  margin-top: 56px;
  padding: 32px 0 0;
  background: transparent;
  border: none;
  border-top: 1px solid var(--border-strong);
  border-radius: 0;
  position: relative;
}
.checklist::before { display: none; }
.checklist-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
  position: relative;
}
.checklist-title { font-family: var(--font-mono); font-size: 11px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.checklist-progress { font-family: var(--font-mono); font-size: 12px; color: var(--text-2); font-variant-numeric: tabular-nums; letter-spacing: 0.04em; }

.checklist-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-subtle);
  border-radius: 0;
  cursor: pointer;
  transition: color 0.15s;
  margin-bottom: 0;
}
.checklist-item:hover { background: transparent; }
.checklist-item:hover .checklist-text { color: var(--text-1); }
.checklist-item:last-child { border-bottom: none; }

.checklist-box {
  width: 18px;
  height: 18px;
  border-radius: 0;
  background: transparent;
  border: 1.5px solid var(--border-strong);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  transition: all 0.15s;
}
.checklist-box svg { opacity: 0; transform: scale(0.5); transition: all 0.15s; }
.checklist-item.checked .checklist-box {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: none;
}
.checklist-item.checked .checklist-box svg { opacity: 1; transform: scale(1); }

.checklist-text {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--text-2);
  transition: color 0.18s;
}
.checklist-item.checked .checklist-text {
  color: var(--text-4);
  text-decoration: line-through;
  text-decoration-color: var(--border-strong);
  text-decoration-thickness: 1px;
}

/* ═══ COMPLETE BUTTON ═══ */
.complete-section {
  margin-top: 32px;
  display: flex;
  gap: 12px;
  align-items: stretch;
  flex-wrap: wrap;
}
.btn-complete {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 52px;
  padding: 0 28px;
  background: var(--accent);
  color: white;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--r-sm);
  border: 1px solid var(--accent);
  box-shadow: none;
  transition: background 0.12s;
}
.btn-complete:hover { transform: none; background: var(--accent-hover); box-shadow: none; }
.btn-complete.done {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-1);
  box-shadow: none;
}

/* ═══ LESSON NAVIGATION ═══ */
.lesson-nav {
  margin-top: 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--border-strong);
}
.lesson-nav-card {
  padding: 28px 0;
  background: transparent;
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: color 0.18s;
  text-align: left;
}
.lesson-nav-card:hover { background: transparent; }
.lesson-nav-card:hover .lnc-title { color: var(--accent); }
.lesson-nav-card.next { text-align: right; padding-left: 24px; border-left: 1px solid var(--border-subtle); }
.lesson-nav-card:not(.next) { padding-right: 24px; }
.lesson-nav-card.disabled { opacity: 0.3; cursor: not-allowed; }
.lnc-dir { font-family: var(--font-mono); font-size: 10.5px; color: var(--text-4); margin-bottom: 8px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 600; }
.lnc-title { font-family: var(--font-display); font-size: 18px; font-weight: 700; color: var(--text-1); letter-spacing: -0.015em; line-height: 1.2; transition: color 0.18s; }

/* ═══ EMPTY / SERVICE ═══ */
.empty-state {
  padding: 80px 40px;
  text-align: left;
  background: transparent;
  border: none;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  border-radius: 0;
  max-width: var(--content-max);
  margin: 60px auto;
}
.empty-icon {
  width: 44px;
  height: 44px;
  margin: 0 0 28px;
  border-radius: var(--r-sm);
  background: transparent;
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  color: var(--text-1);
}
.empty-title { font-family: var(--font-display); font-size: 32px; font-weight: 800; letter-spacing: -0.025em; margin-bottom: 14px; color: var(--text-1); }
.empty-text { font-family: var(--font-body); font-size: 16px; color: var(--text-3); max-width: 60ch; margin: 0; line-height: 1.55; }

/* ════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════════════ */

/* Sidebar backdrop (only visible on mobile when sidebar opens) */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 45;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.sidebar-backdrop.show { opacity: 1; }

/* ════════════════════════════════════════════════════════════════════
   ADMIN
   ════════════════════════════════════════════════════════════════════ */
.admin-toolbar-btn { height: 40px; padding: 0 14px; font-size: 12.5px; }
.admin-toolbar-danger { color: var(--accent); border-color: var(--accent); }
.admin-toolbar-danger:hover { background: var(--accent); color: white; }

/* Modal */
body.modal-open { overflow: hidden; }
.admin-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.am-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: amFadeIn 0.18s ease;
}
.am-dialog {
  position: relative;
  width: 100%;
  max-width: 760px;
  max-height: 90vh;
  background: var(--bg-0);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: amSlideIn 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}
.am-dialog-md { max-width: 620px; }
.am-dialog-xl { max-width: 920px; }
.am-inner {
  padding: 24px 28px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}
@keyframes amFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes amSlideIn { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }

.ae-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
}
.ae-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.ae-title-main {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-1);
}
.ae-close {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-2);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.ae-close:hover { background: var(--bg-card); color: var(--text-1); }

.ae-form { display: flex; flex-direction: column; gap: 16px; }
.ae-form-wide { gap: 22px; }
.ae-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
}
.ae-col-2 { grid-column: span 2; }
.ae-field { display: flex; flex-direction: column; gap: 6px; }
.ae-lbl {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.ae-lbl-small {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-right: 6px;
}
.ae-hint { font-size: 11.5px; color: var(--text-4); margin-left: 6px; font-weight: 400; text-transform: none; letter-spacing: 0; font-family: var(--font-body); }
.ae-input {
  width: 100%;
  background: var(--bg-card);
  color: var(--text-1);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13.5px;
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.15s, background 0.15s;
  resize: vertical;
}
.ae-input::placeholder { color: var(--text-4); }
.ae-input:focus { border-color: var(--accent); }
.ae-input-thin { padding: 8px 10px; font-size: 13px; }
.ae-input-type {
  width: auto;
  min-width: 140px;
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.ae-md-input {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  min-height: 280px;
}

.ae-section {
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}
.ae-section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.ae-section-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-1);
}

.ae-blocks { display: flex; flex-direction: column; gap: 10px; }
.ae-block {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 12px;
}
.ae-block-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 12px;
}
.ae-block-controls { display: flex; gap: 4px; }
.ae-block-body { display: flex; flex-direction: column; gap: 8px; }
.ae-items { display: flex; flex-direction: column; gap: 6px; margin-bottom: 8px; }
.ae-item-row { display: flex; gap: 6px; align-items: center; }
.ae-item-row .ae-input { flex: 1; }

.ae-table-edit { display: flex; flex-direction: column; gap: 6px; }
.ae-table-row { display: flex; gap: 6px; align-items: center; }
.ae-table-row .ae-input { flex: 1; }

.ae-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-3);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
  flex-shrink: 0;
}
.ae-icon-btn:hover { background: var(--bg-card-hover); color: var(--text-1); border-color: var(--border-strong); }
.ae-icon-btn-danger:hover { background: var(--accent); color: white; border-color: var(--accent); }

.ae-add-block {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.ae-chip {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.ae-chip:hover { background: var(--accent); color: white; border-color: var(--accent); }

.ae-btn-link {
  background: transparent;
  border: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 4px 0;
}
.ae-btn-link:hover { color: var(--accent-hover); text-decoration: underline; }

.ae-footer {
  position: sticky;
  bottom: -24px;
  z-index: 5;
  margin: 8px -28px -24px;
  padding: 14px 28px;
  background: var(--bg-0);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  box-shadow: 0 -4px 16px var(--bg-0);
}
.ae-footer-right { display: flex; gap: 10px; }
.ae-btn {
  height: 40px;
  padding: 0 18px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.01em;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.ae-btn-ghost { background: transparent; border-color: var(--border-strong); color: var(--text-1); }
.ae-btn-ghost:hover { background: var(--bg-card-hover); }
.ae-btn-primary { background: var(--accent); color: white; border-color: var(--accent); }
.ae-btn-primary:hover { background: var(--accent-hover); }
.ae-btn-danger { background: transparent; color: var(--accent); border-color: var(--accent); }
.ae-btn-danger:hover { background: var(--accent); color: white; }
.ae-btn-danger-solid { background: var(--accent); color: white; border-color: var(--accent); }
.ae-btn-danger-solid:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

/* Confirm dialog */
.am-dialog-sm { max-width: 440px; }
.ae-confirm {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 4px 0 18px;
}
.aec-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  font-size: 22px;
  flex-shrink: 0;
}
.aec-icon-danger {
  background: var(--accent-glow-soft);
  border-color: var(--accent);
  color: var(--accent);
}
.aec-body { flex: 1; min-width: 0; }
.aec-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--text-1);
  margin-bottom: 6px;
  line-height: 1.25;
}
.aec-message {
  font-size: 13.5px;
  color: var(--text-3);
  line-height: 1.5;
}
.ae-footer-confirm {
  margin-top: 0;
  padding-top: 14px;
}

@media (max-width: 768px) {
  .admin-modal { padding: 12px; }
  .am-dialog { max-height: 95vh; border-radius: 14px; }
  .am-inner { padding: 18px 18px; }
  .ae-grid { grid-template-columns: 1fr; }
  .ae-col-2 { grid-column: span 1; }
  .ae-footer { flex-direction: column-reverse; align-items: stretch; gap: 8px; }
  .ae-footer-right { flex-direction: column; }
  .ae-btn { width: 100%; }
  .ae-input-type { min-width: 110px; }
}

.nav-item-admin {
  margin: 0 4px 8px !important;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle) !important;
  border-radius: 10px !important;
  color: var(--text-3);
}
.nav-item-admin.active {
  background: var(--bg-card-hover);
  border-color: var(--text-1) !important;
  color: var(--text-1) !important;
}

.admin-wrap { max-width: 1280px; }
.admin-header { padding: 48px 0 28px; }
.admin-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.admin-badge-coming {
  margin-left: 4px;
  padding: 3px 8px;
  background: var(--accent-glow-soft);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  font-size: 10px;
  letter-spacing: 0.06em;
}
.admin-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}
.admin-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-1);
}
.admin-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.admin-mod-sub {
  font-family: var(--font-body);
  font-size: 15.5px;
  color: var(--text-3);
  margin-top: 14px;
  max-width: 60ch;
  line-height: 1.5;
}

.admin-search {
  height: 40px;
  width: 260px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0 14px;
  color: var(--text-1);
  font-size: 13.5px;
  outline: none;
  transition: border-color 0.15s;
}
.admin-search:focus { border-color: var(--accent); }
.admin-search::placeholder { color: var(--text-4); }
.admin-add-btn { height: 40px; padding: 0 16px; font-size: 13px; }

.admin-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 32px;
}
.admin-stat {
  padding: 18px 22px;
  border-right: 1px solid var(--border-subtle);
}
.admin-stat:last-child { border-right: none; }
.admin-stat:first-child { padding-left: 0; }
.as-num {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.as-lbl {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-top: 6px;
}

.admin-table {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 40px;
}
.at-head, .at-row {
  display: grid;
  grid-template-columns: 24px 50px 1fr 90px 150px;
  align-items: center;
  gap: 18px;
  padding: 14px 22px;
}
.at-col-chev { color: var(--text-3); line-height: 1; display: flex; align-items: center; justify-content: center; }
.at-chev {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: var(--hi-2);
  color: var(--text-2);
  font-size: 11px;
  transition: transform 0.18s ease, background 0.15s, color 0.15s;
}
.at-row-group[open] > .at-row-module .at-chev { transform: rotate(90deg); background: var(--accent-glow-soft); color: var(--accent); }
.at-row-module:hover .at-chev { background: var(--accent); color: white; }
.at-head {
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.at-row-group { border-bottom: 1px solid var(--border-subtle); }
.at-row-group:last-child { border-bottom: none; }
.at-row-group[open] > .at-row-module { background: var(--bg-card-hover); }
.at-row-module {
  cursor: pointer;
  transition: background 0.15s;
  list-style: none;
}
.at-row-module::-webkit-details-marker { display: none; }
.at-row-module::marker { content: ''; }
.at-row-module:hover { background: var(--bg-card-hover); }
.at-col-num {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.at-mod-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.01em;
}
.at-mod-sub {
  font-size: 12.5px;
  color: var(--text-3);
  margin-top: 4px;
  line-height: 1.35;
}
.at-col-lessons {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}
.at-action {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-2);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.at-action:hover { background: var(--accent); color: white; border-color: var(--accent); }

.at-lessons {
  background: var(--bg-1);
  padding: 8px 22px 14px;
  border-top: 1px solid var(--border-subtle);
}
.at-lesson {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 10px 10px;
  border-bottom: 1px solid var(--border-subtle);
}
.at-lesson:last-of-type { border-bottom: none; }
.at-lesson-num {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-4);
  font-variant-numeric: tabular-nums;
}
.at-lesson-title { font-size: 13.5px; font-weight: 600; color: var(--text-1); margin-bottom: 4px; }
.at-lesson-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-4);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  align-items: center;
}
.at-lesson-meta .lc-pill { font-size: 9px; padding: 2px 6px; }
.at-done { color: var(--signal-green, #28c93f); display: inline-flex; align-items: center; gap: 4px; }
.at-lesson-actions { display: flex; gap: 4px; }
.at-action-mini {
  min-height: 30px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 7px;
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.at-lesson-actions .at-action-mini {
  min-width: 30px;
  width: auto;
  padding: 0 10px;
}
.at-action-mini:hover { background: var(--accent); color: white; border-color: var(--accent); }
.at-add-lesson {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 10px;
  background: transparent;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  color: var(--text-3);
  font-size: 12.5px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.at-add-lesson:hover { background: var(--bg-card-hover); color: var(--accent); border-color: var(--accent); }

.admin-note {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 60px;
}
.an-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}
.an-text { font-size: 13px; color: var(--text-3); line-height: 1.5; }
.an-text code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-1);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}

.admin-lesson-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 60px; }
.admin-lesson-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 18px 20px;
}
.alc-head { display: grid; grid-template-columns: 38px 1fr auto; gap: 14px; align-items: start; }
.alc-num {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  padding-top: 4px;
}
.alc-title { font-family: var(--font-display); font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.alc-summary { font-size: 13px; color: var(--text-3); line-height: 1.45; }
.alc-actions { display: flex; gap: 6px; }
.alc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}
.alc-meta b { color: var(--text-4); font-weight: 600; margin-right: 4px; text-transform: uppercase; }
.alc-blocks { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border-subtle); }
.alc-blocks summary {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 4px 0;
}
.alc-blocks summary:hover { color: var(--accent); }
.alc-block-list { padding-left: 22px; margin-top: 8px; display: flex; flex-direction: column; gap: 4px; }
.alc-block-list li { font-size: 12.5px; color: var(--text-2); line-height: 1.5; }
.alc-block-type {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--bg-1);
  border: 1px solid var(--border-subtle);
  padding: 1px 6px;
  border-radius: 4px;
  margin-right: 6px;
  color: var(--text-3);
}

@media (max-width: 1024px) {
  .at-head, .at-row { grid-template-columns: 20px 40px 1fr 70px; gap: 12px; padding: 12px 16px; }
  .at-col-actions { display: none; }
  .admin-stats { grid-template-columns: repeat(3, 1fr); }
  .admin-stat:nth-child(3) { border-right: none; }
  .admin-stat:nth-child(4), .admin-stat:nth-child(5) { border-top: 1px solid var(--border-subtle); }
  .admin-stat:nth-child(4) { padding-left: 0; }
}
@media (max-width: 768px) {
  .admin-header { padding: 28px 0 18px; }
  .admin-head-row { flex-direction: column; align-items: stretch; }
  .admin-search { width: 100%; }
  .admin-stats { grid-template-columns: repeat(2, 1fr); }
  .admin-stat { padding: 14px 12px; }
  .admin-stat:nth-child(odd) { padding-left: 0; }
  .admin-stat:nth-child(2), .admin-stat:nth-child(4) { border-right: none; }
  .admin-stat:nth-child(n+3) { border-top: 1px solid var(--border-subtle); }
  .admin-stat:nth-child(5) { grid-column: span 2; }
  .at-head { display: none; }
  .at-row { grid-template-columns: 18px 36px 1fr; gap: 10px; padding: 12px 14px; }
  .at-col-lessons, .at-col-actions { display: none; }
}

/* ════════════════════════════════════════════════════════════════════
   DASHBOARD
   ════════════════════════════════════════════════════════════════════ */
.dash-header { padding: 56px 0 32px; }
.dash-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.dash-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--text-1);
  margin-bottom: 14px;
}
.dash-sub {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--text-3);
}

.dash-continue {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 20px;
  background: var(--bg-card);
  color: var(--text-1);
  border-radius: 12px;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent);
  transition: background 0.18s ease, border-color 0.18s ease;
  margin-bottom: 32px;
}
.dash-continue:hover { background: var(--bg-card-hover); border-color: var(--border-strong); border-left-color: var(--accent); }
.dash-continue-empty { border-left-color: var(--border-subtle); }
.dc-left { flex: 1; min-width: 0; }
.dc-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.dc-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-bottom: 4px;
  color: var(--text-1);
}
.dc-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-4);
}
.dc-arrow {
  font-size: 18px;
  color: var(--text-3);
  flex-shrink: 0;
  transition: transform 0.2s ease, color 0.2s ease;
}
.dash-continue:hover .dc-arrow { transform: translateX(4px); color: var(--accent); }

.dash-kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 40px;
}
.dash-kpi {
  padding: 24px 28px;
  border-right: 1px solid var(--border-subtle);
}
.dash-kpi:last-child { border-right: none; }
.dash-kpi:first-child { padding-left: 0; }
.dk-num {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.dk-unit { font-size: 18px; color: var(--text-3); font-weight: 600; margin-left: 2px; }
.dk-lbl {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-top: 10px;
}
.dk-bar {
  height: 3px;
  background: var(--border-subtle);
  border-radius: 2px;
  margin-top: 14px;
  overflow: hidden;
}
.dk-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.dash-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  margin-bottom: 60px;
}
.dash-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 22px;
}
.dp-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.dp-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.dp-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  cursor: pointer;
}
.dp-link:hover { color: var(--accent); }
.dp-list { display: flex; flex-direction: column; gap: 4px; }
.dp-row {
  display: grid;
  grid-template-columns: 38px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 10px 8px;
  background: transparent;
  border: 0;
  border-radius: 8px;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s;
}
.dp-row:hover { background: var(--bg-card-hover); }
.dp-num {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}
.dp-info { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.dp-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.dp-bar {
  display: block;
  height: 4px;
  background: var(--border-subtle);
  border-radius: 2px;
  overflow: hidden;
}
.dp-bar-fill {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.dp-pct {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}
.dp-row-recent .dp-recent-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.dp-row-recent .dp-info { gap: 2px; }
.dp-recent-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-4);
}
.dp-arrow { color: var(--text-4); font-size: 15px; }
.dp-row:hover .dp-arrow { color: var(--accent); }
.dp-empty {
  padding: 18px 10px;
  font-size: 13px;
  color: var(--text-3);
  text-align: center;
}

@media (max-width: 980px) {
  .dash-grid { grid-template-columns: 1fr; gap: 20px; }
  .dash-kpis { grid-template-columns: repeat(2, 1fr); }
  .dash-kpi:nth-child(2) { border-right: none; }
  .dash-kpi:nth-child(3), .dash-kpi:nth-child(4) { border-top: 1px solid var(--border-subtle); }
  .dash-kpi:nth-child(3) { padding-left: 0; }
}

@media (max-width: 768px) {
  .dash-header { padding: 28px 0 22px; }
  .dash-title { font-size: 28px; }
  .dash-sub { font-size: 14px; }
  .dash-continue { padding: 14px 16px; border-radius: 10px; gap: 10px; }
  .dc-title { font-size: 15.5px; }
  .dc-eyebrow { font-size: 10px; margin-bottom: 4px; }
  .dash-kpis { padding: 0; }
  .dash-kpi { padding: 16px 14px; }
  .dash-kpi:first-child, .dash-kpi:nth-child(3) { padding-left: 14px; }
  .dk-num { font-size: 24px; }
  .dk-unit { font-size: 14px; }
  .dash-panel { padding: 16px; border-radius: 12px; }
}

@media (max-width: 1024px) {
  :root { --sidebar-w: 240px; --topbar-h: 60px; }
  .hero-title { font-size: 36px; }
  .page { padding: 32px 24px 60px; }
}

/* ─── TABLET / MOBILE (≤ 768px) ─── */
@media (max-width: 768px) {
  :root { --topbar-h: 56px; }

  .app { grid-template-columns: 1fr; }

  /* Sidebar становится выдвижной */
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    width: min(86vw, 320px);
    z-index: 60;
    box-shadow: 0 0 0 1px var(--border-subtle);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
  }
  .sidebar-backdrop.show { display: block; }

  /* Topbar */
  .topbar {
    padding: 0 14px;
    padding-left: max(14px, env(safe-area-inset-left));
    padding-right: max(14px, env(safe-area-inset-right));
  }
  .topbar-actions { gap: 6px; }
  /* "Спросить ИИ" — только иконка */
  .tb-btn span { display: none; }
  .tb-btn { padding: 0 10px; min-width: 38px; justify-content: center; }
  .tb-avatar { width: 32px; height: 32px; font-size: 12px; border-radius: 9px; }
  /* Breadcrumbs — только текущая страница */
  .breadcrumbs > a, .breadcrumbs > .crumb-sep { display: none; }
  .breadcrumbs > a:last-of-type,
  .breadcrumbs > .crumb-sep:last-of-type { display: none; }
  .breadcrumbs .crumb-current { font-size: 14px; }
  .menu-toggle { display: inline-flex !important; width: 38px; padding: 0 !important; justify-content: center; }

  /* Page padding + safe area */
  .page {
    padding: 20px 16px calc(60px + env(safe-area-inset-bottom));
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }

  /* HERO */
  .hero { padding: 26px 22px 28px; border-radius: 18px; margin-bottom: 26px; }
  .hero-eyebrow { font-size: 10.5px; padding: 4px 10px; margin-bottom: 16px; }
  .hero-title { font-size: 28px; letter-spacing: -1px; line-height: 1.1; margin-bottom: 14px; }
  .hero-sub { font-size: 14.5px; margin-bottom: 22px; line-height: 1.5; }
  .hero-actions { gap: 10px; }
  .btn-primary, .btn-ghost { height: 46px; padding: 0 18px; font-size: 14px; flex: 1; justify-content: center; min-width: 0; }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 16px;
    margin-top: 24px;
    padding-top: 20px;
  }
  .hero-stats > div,
  .hero-stats > div:first-child,
  .hero-stats > div:last-child { padding: 0; }
  .hero-stats > div::after { display: none; }
  .hero-stat-num { font-size: 22px; }
  .hero-stat-lbl { font-size: 11.5px; }

  /* Section heads */
  .section-head { flex-direction: column; align-items: flex-start; gap: 4px; }
  .section-title { font-size: 19px; }
  .section-sub { font-size: 13px; }

  /* Module cards grid */
  .modules-grid { grid-template-columns: 1fr; gap: 12px; }
  .module-card { min-height: 0; padding: 20px; border-radius: 14px; }
  .mc-icon { width: 38px; height: 38px; border-radius: 11px; }
  .mc-title { font-size: 16px; }
  .mc-sub { font-size: 12.5px; }

  /* Service cards */
  .service-grid { grid-template-columns: 1fr; gap: 10px; }

  /* MODULE PAGE */
  .module-header { padding: 22px 20px; border-radius: 16px; margin-bottom: 22px; }
  .mh-top { gap: 12px; }
  .mh-eyebrow { font-size: 10.5px; gap: 8px; flex-wrap: wrap; }
  .mh-eyebrow-tag { padding: 3px 7px; }
  .mh-title { font-size: 22px; letter-spacing: -0.5px; line-height: 1.15; }
  .mh-sub { font-size: 13.5px; margin-top: 6px; }
  .mh-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 18px;
    padding-top: 16px;
  }
  .mh-meta-item,
  .mh-meta-item:first-child,
  .mh-meta-item:last-child { padding: 0; }
  .mh-meta-item::after { display: none; }
  .mh-meta-num { font-size: 16px; }
  .mh-meta-lbl { font-size: 11px; }

  /* Lesson cards: grid-layout — meta переезжает под info */
  .lesson-card {
    display: grid;
    grid-template-columns: 32px 1fr;
    grid-template-areas:
      "num info"
      "num meta";
    gap: 6px 12px;
    padding: 16px 16px 16px 40px;
    align-items: start;
    margin: 0;
  }
  .lesson-card:hover { transform: none; }
  .lesson-card::before { left: 22px; }
  .lesson-card:first-child::before { top: 16px; }
  .lesson-card:last-child::before { bottom: calc(100% - 32px); }
  .lc-num {
    grid-area: num;
    width: 28px;
    height: 28px;
    font-size: 10.5px;
    border-radius: 50%;
    align-self: start;
    margin-left: -25px;
    margin-top: 0;
  }
  .lesson-card.done .lc-num::before { font-size: 12px; }
  .lc-info { grid-area: info; min-width: 0; }
  .lc-title { font-size: 14.5px; line-height: 1.3; margin-bottom: 4px; }
  .lc-summary { font-size: 12.5px; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .lc-meta {
    grid-area: meta;
    display: flex;
    flex-direction: row;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 4px;
  }
  .lc-pill { font-size: 9.5px; padding: 3px 7px; flex-shrink: 0; }
  .lc-arrow { display: none; }

  /* LESSON PAGE */
  .lesson-header { margin-bottom: 24px; padding-bottom: 18px; }
  .lh-meta { gap: 8px; margin-bottom: 12px; }
  .lh-title { font-size: 24px; letter-spacing: -0.5px; line-height: 1.15; margin-bottom: 10px; }
  .lh-summary { font-size: 15px; line-height: 1.5; }
  .lesson-content { font-size: 15px; }
  .lesson-content p { font-size: 15px; line-height: 1.6; }
  .lesson-content h3 { font-size: 17px; margin-top: 26px; }
  .lesson-content .l-list li, .lesson-content .l-ol li { font-size: 14.5px; padding-left: 24px; }
  .lesson-content .l-callout, .lesson-content .l-card, .lesson-content .l-result { padding: 16px 16px; gap: 12px; }
  .lesson-content .l-card-title { font-size: 14px; }
  .lesson-content .l-card-text, .lesson-content .l-callout-text { font-size: 14px; }
  .lesson-content .l-result-text { font-size: 14px; }
  .lesson-content th, .lesson-content td { padding: 10px 12px; font-size: 13px; }

  /* Checklist */
  .checklist { padding: 20px 18px; margin-top: 32px; border-radius: 14px; }
  .checklist-item { padding: 12px 12px; }
  .checklist-box { width: 22px; height: 22px; }
  .checklist-text { font-size: 13.5px; line-height: 1.4; }

  /* Complete + lesson nav */
  .complete-section { flex-direction: column; align-items: stretch; gap: 10px; margin-top: 22px; }
  .btn-complete { width: 100%; justify-content: center; height: 48px; }
  .complete-section .btn-ghost { width: 100%; justify-content: center; }
  .lesson-nav { grid-template-columns: 1fr; gap: 10px; margin-top: 36px; }
  .lesson-nav-card { padding: 14px 16px; }
  .lesson-nav-card.next { text-align: left; }
  .lnc-dir { font-size: 11px; }
  .lnc-title { font-size: 13.5px; }

  /* Empty/service */
  .empty-state { padding: 40px 24px; }
  .empty-icon { width: 48px; height: 48px; }
  .empty-title { font-size: 17px; }
}

/* ─── ULTRA-SMALL (≤ 380px, iPhone SE) ─── */
@media (max-width: 380px) {
  .page { padding: 16px 12px calc(60px + env(safe-area-inset-bottom)); }
  .hero { padding: 22px 18px 24px; }
  .hero-title { font-size: 24px; }
  .hero-sub { font-size: 14px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-ghost { flex: 0 0 auto; }
  .hero-stat-num { font-size: 20px; }
  .module-card { padding: 18px; }
  .module-header { padding: 20px 18px; }
  .mh-title { font-size: 20px; }
  .lh-title { font-size: 22px; }
  .lh-summary { font-size: 14px; }
  .lesson-content { font-size: 14.5px; }
  .lesson-content p { font-size: 14.5px; }
  .lesson-card { padding: 12px 14px; gap: 10px; }
  .lc-num { width: 28px; height: 28px; font-size: 12px; }
  .checklist { padding: 18px 14px; }
  .breadcrumbs .crumb-current { font-size: 13px; }
  .tb-btn { min-width: 36px; padding: 0 8px; }
}

.menu-toggle { display: none; }
.sidebar-backdrop { display: none; }

/* ════════════════════════════════════════════════════════════════════
   TEXTURE + DEPTH — едва заметный grain поверх фона
   ════════════════════════════════════════════════════════════════════ */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.5 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: 0.04;
  mix-blend-mode: overlay;
}
[data-theme="light"] body::before { opacity: 0.05; mix-blend-mode: multiply; }

/* ════════════════════════════════════════════════════════════════════
   UNDERLINE ANIMATIONS — breadcrumbs + nav
   ════════════════════════════════════════════════════════════════════ */
.breadcrumbs a {
  position: relative;
  transition: color 0.18s ease;
}
.breadcrumbs a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.28s cubic-bezier(0.65, 0, 0.35, 1);
}
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs a:hover::after { transform: scaleX(1); transform-origin: left; }

/* ════════════════════════════════════════════════════════════════════
   ENHANCED HOVERS — module/service/dash-panel
   ════════════════════════════════════════════════════════════════════ */
.module-card { transition: background-color 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease; }
.module-card:hover { transform: translateY(-3px); }

.service-card { transition: background-color 0.25s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
.service-card:hover { transform: translateY(-1px); }

.dash-panel { transition: border-color 0.25s ease, box-shadow 0.3s ease; }
.dash-panel:hover { border-color: var(--border-strong); }

/* Стрелки в lesson-card / module-card — плавный сдвиг */
.lc-arrow, .mc-foot .mc-progress-bar { transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
.lesson-card:hover .lc-arrow { transform: translateX(4px); }

/* ════════════════════════════════════════════════════════════════════
   PROFILE POPOVER — открывается по клику на аватарку
   ════════════════════════════════════════════════════════════════════ */
.profile-popover {
  position: fixed;
  z-index: 180;
  width: 320px;
  max-width: calc(100vw - 24px);
  background: var(--bg-1);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
  padding: 16px;
  animation: ppIn 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes ppIn {
  from { opacity: 0; transform: translateY(-6px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.pp-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}
.pp-avatar {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient-accent);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  box-shadow: 0 6px 16px var(--accent-glow);
  flex-shrink: 0;
}
.pp-name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.pp-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-4);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}
.pp-form { display: flex; flex-direction: column; gap: 12px; }
.pp-save { width: 100%; }

/* ════════════════════════════════════════════════════════════════════
   STREAK BLOCK — счётчик дней подряд + heatmap активности
   ════════════════════════════════════════════════════════════════════ */
.dash-streak {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  margin-bottom: 28px;
}
.ds-left { display: flex; align-items: center; gap: 12px; }
.ds-flame { font-size: 26px; line-height: 1; }
.ds-num {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.ds-lbl {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 5px;
}
.ds-grid {
  display: grid;
  grid-template-rows: repeat(7, 12px);
  grid-auto-flow: column;
  grid-auto-columns: 12px;
  gap: 3px;
  flex-shrink: 0;
}
.ds-cell {
  width: 12px;
  height: 12px;
  border-radius: 2.5px;
  background: var(--border-subtle);
  transition: transform 0.12s ease;
}
.ds-cell:hover { transform: scale(1.3); }
.ds-cell.ds-l0 { background: var(--border-subtle); }
.ds-cell.ds-l1 { background: var(--accent-glow); }
.ds-cell.ds-l2 { background: var(--accent-glow-soft); }
.ds-cell.ds-l3 { background: color-mix(in srgb, var(--accent) 60%, transparent); }
.ds-cell.ds-l4 { background: var(--accent); }

@media (max-width: 768px) {
  .dash-streak { gap: 14px; padding: 14px 16px; }
  .ds-grid { grid-template-rows: repeat(4, 10px); grid-auto-columns: 10px; gap: 2px; }
  .ds-num { font-size: 24px; }
}
.ae-input-lg { padding: 12px 14px; font-size: 15px; }
.ae-btn-lg { height: 48px; font-size: 14px; }

/* ════════════════════════════════════════════════════════════════════
   READING PROGRESS BAR — тонкая полоса вверху страницы урока
   ════════════════════════════════════════════════════════════════════ */
.reading-progress {
  position: fixed;
  top: var(--topbar-h, 64px);
  left: var(--sidebar-w, 260px);
  right: 0;
  height: 2px;
  background: transparent;
  z-index: 30;
  pointer-events: none;
}
.rp-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(to right, var(--accent), var(--accent-hover));
  box-shadow: 0 0 12px var(--accent-glow);
  transition: width 0.08s linear;
}
@media (max-width: 768px) {
  .reading-progress { left: 0; top: var(--topbar-h, 56px); }
}

/* ════════════════════════════════════════════════════════════════════
   COMMAND PALETTE (Cmd+K)
   ════════════════════════════════════════════════════════════════════ */
.cmd-palette {
  position: fixed;
  inset: 0;
  z-index: 250;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 24px 24px;
}
.cp-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: amFadeIn 0.18s ease;
}
.cp-dialog {
  position: relative;
  width: 100%;
  max-width: 640px;
  background: var(--bg-1);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 70vh;
  animation: amSlideIn 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}
.cp-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-subtle);
}
.cp-icon { color: var(--text-4); display: inline-flex; }
.cp-input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--text-1);
  font-family: var(--font-body);
  font-size: 16px;
  letter-spacing: -0.005em;
}
.cp-input::placeholder { color: var(--text-4); }
.cp-hint {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--border-subtle);
  padding: 3px 7px;
  border-radius: 6px;
}
.cp-results {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 60px;
}
.cp-result {
  display: grid;
  grid-template-columns: 32px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  background: transparent;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  color: var(--text-2);
  transition: background 0.12s ease;
}
.cp-result.active { background: var(--bg-card-hover); color: var(--text-1); }
.cp-result-icon {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-3);
}
.cp-result.active .cp-result-icon { color: var(--accent); border-color: var(--accent); }
.cp-result-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.cp-result-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cp-result-title mark { background: transparent; color: var(--accent); font-weight: 800; padding: 0; }
.cp-result-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-4);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cp-result-arrow {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-4);
  letter-spacing: 0.05em;
  opacity: 0;
  transition: opacity 0.12s ease;
}
.cp-result.active .cp-result-arrow { opacity: 1; color: var(--accent); }
.cp-empty {
  padding: 26px 16px;
  font-size: 13px;
  color: var(--text-3);
  text-align: center;
}
.cp-foot {
  display: flex;
  gap: 20px;
  padding: 10px 16px;
  background: var(--bg-0);
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-4);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.cp-foot kbd {
  display: inline-block;
  padding: 2px 6px;
  margin-right: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-2);
}

@media (max-width: 768px) {
  .cmd-palette { padding: 8vh 12px 12px; }
  .cp-dialog { max-height: 80vh; }
  .cp-foot { gap: 10px; flex-wrap: wrap; padding: 8px 12px; }
  .cp-input { font-size: 15px; }
}

/* ════════════════════════════════════════════════════════════════════
   AUTH MODAL — invite-only registration / login
   ════════════════════════════════════════════════════════════════════ */
.auth-modal-wrap {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-0);
  padding: 20px;
}
.auth-modal {
  max-width: 420px; width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  padding: 36px 32px 28px;
  text-align: center;
}
.auth-logo {
  width: 56px; height: 56px;
  margin: 0 auto 18px;
  background: var(--gradient-accent);
  border-radius: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  color: white;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 28px;
  letter-spacing: -0.04em;
  box-shadow: 0 8px 24px var(--accent-glow);
}
.auth-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--text-1);
}
.auth-sub {
  font-size: 13.5px;
  color: var(--text-3);
  line-height: 1.5;
  margin-bottom: 24px;
}
.auth-form {
  display: flex; flex-direction: column;
  gap: 14px;
  text-align: left;
}
.auth-error {
  background: rgba(255, 80, 80, 0.08);
  border: 1px solid rgba(255, 80, 80, 0.3);
  color: #ff5050;
  font-size: 13px;
  padding: 10px 12px;
  border-radius: 8px;
  text-align: center;
}
.auth-foot {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-4);
  letter-spacing: 0.06em;
}

/* ════════════════════════════════════════════════════════════════════
   ADMIN TABS
   ════════════════════════════════════════════════════════════════════ */
.admin-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 1px;
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  scrollbar-width: none;
}
.admin-tabs::-webkit-scrollbar { display: none; }
.admin-tab {
  flex-shrink: 0;
  padding: 10px 16px;
  margin-bottom: -1px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.admin-tab:hover { color: var(--text-1); }
.admin-tab.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ────── Generic admin empty state ────── */
.admin-empty {
  padding: 60px 24px;
  text-align: center;
  background: var(--bg-card);
  border: 1px dashed var(--border-soft);
  border-radius: 14px;
}
.admin-empty-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 8px;
}
.admin-empty-sub {
  font-size: 13.5px;
  color: var(--text-3);
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.5;
}
.adm-empty-inline {
  padding: 20px 16px;
  text-align: center;
  color: var(--text-3);
  font-size: 13.5px;
  background: var(--bg-card);
  border: 1px dashed var(--border-soft);
  border-radius: 10px;
  margin-bottom: 20px;
}

/* ────── Tables ────── */
.adm-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 24px;
  overflow-x: auto;
}
.adm-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
.adm-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-4);
  padding: 12px 14px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}
.adm-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
  color: var(--text-1);
}
.adm-table tbody tr:last-child td { border-bottom: 0; }
.adm-table tbody tr.is-blocked td { opacity: 0.5; }
.adm-table tbody tr:hover td { background: var(--hi-1); }
.adm-table.is-muted { opacity: 0.7; }

.adm-mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-2);
}
.adm-muted { color: var(--text-4); font-size: 12px; }

.adm-th-actions, .adm-td-actions { text-align: right; }
.adm-td-actions { display: flex; gap: 6px; justify-content: flex-end; }

/* ────── Tags ────── */
.adm-tag {
  display: inline-block;
  padding: 3px 8px;
  margin-right: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  color: var(--text-2);
}
.adm-tag-admin {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow-soft);
}
.adm-tag-blocked {
  border-color: #ff5050;
  color: #ff5050;
  background: rgba(255, 80, 80, 0.08);
}
.adm-tag-ok {
  border-color: #10b981;
  color: #10b981;
  background: rgba(16, 185, 129, 0.08);
}
.adm-tag-self {
  border-color: var(--border-soft);
  color: var(--text-3);
  background: var(--hi-1);
}

/* ────── Action buttons ────── */
.adm-btn {
  height: 28px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
  white-space: nowrap;
}
.adm-btn:hover { color: var(--text-1); border-color: var(--text-3); }
.adm-btn-danger { color: #ff5050; border-color: rgba(255, 80, 80, 0.4); }
.adm-btn-danger:hover { background: #ff5050; color: white; border-color: #ff5050; }

/* ────── Invite/grant forms ────── */
.adm-invite-form {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.adm-invite-field { flex: 1; min-width: 200px; }
.adm-invite-field .ae-lbl { display: block; margin-bottom: 6px; }
.adm-invite-error {
  width: 100%;
  background: rgba(255, 80, 80, 0.08);
  border: 1px solid rgba(255, 80, 80, 0.3);
  color: #ff5050;
  font-size: 12.5px;
  padding: 8px 10px;
  border-radius: 6px;
}

/* ────── Section titles ────── */
.adm-section-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 28px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.adm-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 18px;
  padding: 0 6px;
  background: var(--hi-2);
  color: var(--text-2);
  border-radius: 4px;
  font-size: 10.5px;
  font-weight: 700;
}

/* ────── Logs ────── */
.adm-log-filter {
  min-width: 180px;
  height: 38px;
  padding: 0 12px;
}
.adm-log-list {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
}
.adm-log-row {
  display: grid;
  grid-template-columns: 150px 180px 200px 1fr;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 12.5px;
  align-items: center;
}
.adm-log-row:last-child { border-bottom: 0; }
.adm-log-row:hover { background: var(--hi-1); }
.adm-log-time {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-4);
  white-space: nowrap;
}
.adm-log-type {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  color: var(--text-2);
  justify-self: start;
}
.adm-log-type-content { border-color: var(--accent); color: var(--accent); background: var(--accent-glow-soft); }
.adm-log-type-admin   { border-color: var(--border-soft); color: var(--text-2); background: var(--hi-1); }
.adm-log-type-error   { border-color: #ff5050; color: #ff5050; background: rgba(255, 80, 80, 0.08); }

.adm-log-actor { font-size: 12px; }
.adm-log-details {
  color: var(--text-2);
  font-size: 12.5px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ────── Profile popover: signout + admin tag ────── */
.pp-signout {
  background: transparent;
  border: 1px solid var(--border-soft);
  color: var(--text-3);
}
.pp-signout:hover { color: #ff5050; border-color: rgba(255, 80, 80, 0.4); background: rgba(255, 80, 80, 0.06); }
.pp-admin-tag {
  display: inline-block;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  vertical-align: middle;
  margin-left: 4px;
}

/* ────── Mobile adjustments ────── */
@media (max-width: 768px) {
  .admin-tabs { gap: 0; }
  .admin-tab { padding: 10px 12px; font-size: 11px; }
  .adm-table th, .adm-table td { padding: 10px 10px; }
  .adm-log-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 12px 14px;
  }
  .adm-log-time { font-size: 10.5px; }
  .adm-invite-form { flex-direction: column; align-items: stretch; }
  .adm-td-actions { flex-direction: column; gap: 4px; }
}

/* ════════════════════════════════════════════════════════════════════
   ADMIN MODE — отдельный режим с уменьшенным сайдбаром и кнопкой назад
   ════════════════════════════════════════════════════════════════════ */
.admin-back-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  color: var(--text-2);
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}
.admin-back-btn:hover {
  color: var(--text-1);
  border-color: var(--text-3);
  background: var(--bg-card-hover);
}
.admin-back-btn:active { transform: translateX(-2px); }
.abk-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--accent-glow-soft);
  color: var(--accent);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 0.15s ease;
}
.admin-back-btn:hover .abk-arrow { transform: translateX(-2px); }

.nav-item-admin-tab {
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: -0.01em;
}
.nav-item-admin-tab.active {
  background: var(--accent-glow-soft);
  border-color: var(--accent);
  color: var(--accent);
}

/* Скрываем хлебные крошки админки — теперь раздел определяется по сайдбару */
.is-admin-mode .breadcrumbs a[data-go="#/admin"],
.is-admin-mode .breadcrumbs .crumb-sep + a[data-go="#/admin"] { display: none; }

/* Старые inline-табы больше не используются, но если вдруг где-то остались — скрыть */
.is-admin-mode .admin-tabs { display: none; }

/* ════════════════════════════════════════════════════════════════════
   LESSON PREVIEW MODAL — read-only вид как студент видит урок
   ════════════════════════════════════════════════════════════════════ */
.lesson-preview-body {
  max-height: calc(85vh - 100px);
  overflow-y: auto;
  padding: 24px 4px 8px;
  border-top: 1px solid var(--border-subtle);
}
.lesson-preview-body .lesson-wrap { padding: 0 8px; }
.lesson-preview-body .checklist-item { cursor: default; pointer-events: none; }
.lesson-preview-body .btn-complete { opacity: 0.55; cursor: not-allowed; }
.ae-head-preview { border-bottom: 1px dashed var(--border-soft); padding-bottom: 16px; }

/* ════════════════════════════════════════════════════════════════════
   AI-секция в редакторе урока
   ════════════════════════════════════════════════════════════════════ */
.ae-ai-section {
  margin-bottom: 24px;
  padding: 18px;
  background: var(--accent-glow-soft);
  border: 1px solid var(--accent);
  border-radius: 14px;
}
.ae-ai-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}
.ae-ai-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--accent);
}
.ae-ai-sub {
  font-size: 13px;
  color: var(--text-2);
  margin-top: 4px;
  line-height: 1.5;
}
.ae-ai-toggle {
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}
.ae-ai-toggle:hover { background: var(--accent); color: white; }
.ae-ai-body { margin-top: 16px; }
.ae-ai-input {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  resize: vertical;
  min-height: 160px;
}
.ae-ai-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 12px;
}
.ae-ai-mode {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
}
.ae-ai-mode input[type="radio"] { accent-color: var(--accent); }
.ae-ai-foot .ae-btn { margin-left: auto; }
.ae-ai-status {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-family: var(--font-mono);
}
.ae-ai-loading { background: var(--hi-2); color: var(--text-2); }
.ae-ai-ok      { background: rgba(16, 185, 129, 0.1); color: #10b981; border: 1px solid rgba(16, 185, 129, 0.3); }
.ae-ai-error   { background: rgba(255, 80, 80, 0.08); color: #ff5050; border: 1px solid rgba(255, 80, 80, 0.3); }

/* ────── Settings tab ────── */
.adm-settings-section {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 24px;
  max-width: 720px;
}
.adm-settings-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--text-1);
}
.adm-settings-sub {
  font-size: 13.5px;
  color: var(--text-3);
  line-height: 1.55;
  margin-bottom: 20px;
}
.adm-settings-sub strong {
  display: block;
  margin-top: 8px;
  padding: 8px 10px;
  background: var(--hi-2);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  color: var(--text-2);
  font-weight: 500;
}
.adm-link { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.adm-link:hover { color: var(--accent-2); }
.adm-key-mask {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  background: var(--hi-2);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-3);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
}
.adm-settings-form { display: flex; flex-direction: column; gap: 16px; }
.adm-settings-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}
.adm-settings-actions { display: flex; gap: 8px; }
.adm-settings-result {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-family: var(--font-mono);
}
.adm-settings-ok { background: rgba(16, 185, 129, 0.1); color: #10b981; }

/* ════════════════════════════════════════════════════════════════════
   ADMIN CONTENT — сетка карточек модулей (вкладка Контент)
   ════════════════════════════════════════════════════════════════════ */
.adm-modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 60px;
}
.adm-mod-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 20px 20px 18px;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  min-height: 180px;
  position: relative;
}
.adm-mod-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--accent-glow-soft);
  background: var(--bg-card-hover);
}
.amc-num {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text-3);
  margin-bottom: 14px;
  font-variant-numeric: tabular-nums;
}
.adm-mod-card:hover .amc-num { color: var(--accent); }
.amc-body { flex: 1; min-height: 0; }
.amc-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--text-1);
  margin-bottom: 6px;
  line-height: 1.2;
}
.amc-sub {
  font-size: 13.5px;
  color: var(--text-3);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.amc-foot {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-3);
}
.amc-dot { color: var(--text-4); }
.amc-arrow {
  margin-left: auto;
  color: var(--text-4);
  font-family: var(--font-display);
  font-size: 16px;
  transition: color 0.18s ease, transform 0.18s ease;
}
.adm-mod-card:hover .amc-arrow { color: var(--accent); transform: translateX(3px); }

/* Add module card */
.adm-mod-card-add {
  align-items: center;
  justify-content: center;
  text-align: center;
  border-style: dashed;
  border-width: 2px;
  background: transparent;
  font-family: inherit;
}
.adm-mod-card-add:hover { background: var(--accent-glow-soft); border-color: var(--accent); }
.amc-add-icon {
  font-size: 32px;
  font-weight: 300;
  color: var(--text-4);
  margin-bottom: 8px;
  line-height: 1;
}
.adm-mod-card-add:hover .amc-add-icon { color: var(--accent); }
.amc-add-text {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}
.adm-mod-card-add:hover .amc-add-text { color: var(--accent); }

/* ════════════════════════════════════════════════════════════════════
   ADMIN MODULE DETAIL — список уроков внутри модуля
   ════════════════════════════════════════════════════════════════════ */
.amd-back { margin-bottom: 18px; }
.amd-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 8px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s, transform 0.15s;
}
.amd-back-link:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-glow-soft); transform: translateX(-2px); }
.amd-back-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--accent-glow-soft);
  color: var(--accent);
  border-radius: 5px;
  font-size: 13px;
}
.amd-sub {
  margin-top: 12px;
  font-size: 15px;
  color: var(--text-3);
  line-height: 1.5;
  max-width: 720px;
}
.amd-lessons {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 60px;
}
.amd-lesson {
  display: grid;
  grid-template-columns: 50px 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
  transition: border-color 0.18s, background 0.18s, transform 0.18s;
}
.amd-lesson:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}
.amd-lesson-num {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--text-4);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.amd-lesson:hover .amd-lesson-num { color: var(--accent); }
.amd-lesson-info { min-width: 0; }
.amd-lesson-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-1);
  margin-bottom: 4px;
}
.amd-lesson-sub {
  font-size: 13.5px;
  color: var(--text-3);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.amd-lesson-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.amd-lesson-stat {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}
.amd-lesson-edit {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  white-space: nowrap;
  transition: color 0.15s;
}
.amd-lesson:hover .amd-lesson-edit { color: var(--accent); }

@media (max-width: 768px) {
  .adm-modules-grid { grid-template-columns: 1fr; gap: 10px; }
  .adm-mod-card { min-height: auto; padding: 16px; }
  .amd-lesson { grid-template-columns: 40px 1fr; padding: 14px 16px; gap: 14px; }
  .amd-lesson-edit { display: none; }
}