:root {
  --gold: #8B6914;
  --gold-light: #C9A84C;
  --ink: #1a1410;
  --paper: #F8F4EC;
  --paper-dark: #EDE7D5;
  --muted: #6B5E45;
  --accent: #5C3317;
  --rule: #C9A84C44;
  --max-width: 780px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'PT Serif', Georgia, serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  font-size: 17px;
  hyphens: auto;
  -webkit-hyphens: auto;
  hyphenate-limit-chars: 6 3 3;
}

/* ── Page shell ── */
.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 40px 100px;
}

/* ── Cover ── */
.cover {
  border-bottom: 2px solid var(--gold);
  padding-bottom: 40px;
  margin-bottom: 56px;
  text-align: center;
}
.cover .series {
  font-size: 13px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
}
.cover h1 {
  font-family: 'Playfair Display', serif;
  font-size: 2.6rem;
  line-height: 1.2;
  color: var(--accent);
  margin-bottom: 12px;
}
.cover .subtitle {
  font-style: italic;
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 20px;
}
.cover .meta {
  font-size: 13px;
  color: var(--muted);
}
.cover .meta a { color: var(--gold); text-decoration: none; }

/* ── Section headings ── */
h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.55rem;
  color: var(--accent);
  margin: 52px 0 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}
h3 {
  font-family: 'Playfair Display', serif;
  font-size: 1.15rem;
  font-style: italic;
  color: var(--gold);
  margin: 36px 0 12px;
}

/* ── Body text ── */
p { margin-bottom: 1.1em; }
p + p { text-indent: 1.4em; }

/* ── Block quote / cited text ── */
blockquote {
  border-left: 3px solid var(--gold-light);
  margin: 24px 0 24px 0;
  padding: 14px 24px;
  background: var(--paper-dark);
  border-radius: 0 4px 4px 0;
  font-style: italic;
  color: var(--accent);
}
blockquote p { margin-bottom: .5em; }
blockquote p + p { text-indent: 0; }

/* ── Speaker turns ── */
.dialog {
  margin: 28px 0;
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper-dark);
}
.dialog-turn {
  display: grid;
  grid-template-columns: 120px 1fr;
  border-bottom: 1px solid var(--rule);
}
.dialog-turn:last-child { border-bottom: none; }
.dialog-speaker {
  padding: 14px 16px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(139,105,20,.07);
  border-right: 1px solid var(--rule);
  display: flex;
  align-items: flex-start;
  padding-top: 16px;
}
.dialog-text {
  padding: 14px 20px;
  font-size: 15.5px;
  line-height: 1.65;
}
.dialog-text p + p { text-indent: 0; margin-top: .5em; }

/* ── Figures ── */
/* ── Оглавление ── */
/*  padding: 1.5rem 2rem 1.5rem 1.5rem;*/
.toc {
  background: #fdf8ef;
  border: 1px solid #c8a94e;
  border-radius: 4px;
  padding: 1rem 1rem 1rem 1rem;
  margin: 0 0 2.5rem 0;
  page-break-inside: avoid;
}
.toc-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  color: #7a5c1e;
  margin: 0 0 0.8rem 0;
  border: none;
  padding: 0;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.toc-list {
  margin: 0;
  padding: 0 0 0 1.2rem;
  list-style: none;
  counter-reset: toc-h2;
}
.toc-h2 {
  counter-increment: toc-h2;
  counter-reset: toc-h3;
  margin: 0.35rem 0 0.1rem;
  font-size: 0.95rem;
}
.toc-h2::before {
  content: counter(toc-h2) ". ";
  color: #9a7a30;
  font-weight: 600;
}
.toc-h3 {
  counter-increment: toc-h3;
  margin: 0.15rem 0 0.15rem 1.5rem;
  font-size: 0.88rem;
  color: #5a4a2a;
}
.toc-h3::before {
  content: counter(toc-h2) "." counter(toc-h3) " ";
  color: #b8954a;
  font-size: 0.82rem;
}
.toc a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s;
}
.toc a:hover {
  color: #c8a94e;
  text-decoration: underline;
}

figure {
  margin: 36px 0;
  text-align: center;
}
figure img {
  max-width: 100%;
  border: 1px solid var(--rule);
  border-radius: 4px;
  display: block;
  margin: 0 auto;
  background: var(--paper-dark);
  /* placeholder styling until images are added */
  min-height: 60px;
}
figcaption {
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--muted);
  font-style: italic;
}

/* ── Decorative rule between major sections ── */
.section-rule {
  text-align: center;
  margin: 48px 0 4px;
  color: var(--gold-light);
  font-size: 1.1rem;
  letter-spacing: .4em;
}

/* ── Note / annotation ── */
.note {
  background: rgba(139,105,20,.08);
  border-radius: 4px;
  padding: 12px 18px;
  font-size: 14.5px;
  color: var(--muted);
  margin: 20px 0;
}

/* ── Тайм-коды и ссылки на видео ── */
.yt-link {
  font-family: 'PT Serif', serif;
  font-size: 0.78em;
  font-style: normal;
  font-weight: 400;
  vertical-align: middle;
  white-space: nowrap;
  color: var(--muted);
}
.yt-link .timecode {
  color: #c0392b;
}
.yt-link a {
  font-size: 1em;
  text-decoration: none;
  opacity: 0.65;
  transition: opacity 0.15s;
}
.yt-link a:hover { opacity: 1; text-decoration: underline; }
.yt-link a[href*="youtu"] { color: #c0392b; }
.yt-link a[href*="rutube"] { color: #1a6fa8; }
.yt-link a.audio-toc { color: #2a7a4a; font-size: 1em; }

a.yt-toc {
  font-size: 0.78em;
  color: #c0392b;
  opacity: 0.65;
  text-decoration: none;
  white-space: nowrap;
}
a.yt-toc:hover { opacity: 1; text-decoration: underline; }

a.rt-toc {
  font-size: 0.78em;
  color: #1a6fa8;
  opacity: 0.65;
  text-decoration: none;
  white-space: nowrap;
}
a.audio-toc {
  font-size: 0.78em;
  color: #2a7a4a;
  opacity: 0.65;
  text-decoration: none;
  white-space: nowrap;
}
a.audio-toc:hover { opacity: 1; text-decoration: underline; }



.toc .timecode {
  font-size: 0.78em;
  color: #c0392b;
}

@media (max-width: 600px) {
  .page { padding: 32px 20px 60px; }
  .dialog-turn { grid-template-columns: 1fr; }
  .dialog-speaker { border-right: none; border-bottom: 1px solid var(--rule); }
}
@media print {
  body { background: white; }
  .page { padding: 20px; }
}
/* ── Десктоп: layout фиксирован по высоте окна, скроллится только text-panel ── */
@media (min-width: 901px) {
  html, body {
    height: 100%;
    overflow: hidden;
  }

  #app-layout {
    height: 100vh;
    overflow: hidden;
  }

  #text-panel {
    overflow-y: auto;
    height: 100vh;
  }
}

/* ════════════════════════════════════════
   ДВУХКОЛОНОЧНЫЙ LAYOUT
════════════════════════════════════════ */

#app-layout {
  display: flex;
  min-height: 100vh;
  position: relative;
}

/* ── Текстовая панель ── */
#text-panel {
  flex: 1 1 0;
  min-width: 0;
  overflow-y: auto;
  transition: width 0.35s ease;
}
#text-panel .page {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ── Видео-панель (режим embedded) ── */
#video-panel {
  display: none;
  width: 50%;
  flex-shrink: 0;
  border-left: 2px solid var(--rule);
  background: var(--paper);  /* фон как у текста */
  position: relative;
}
#video-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}
/* Верхняя зона плеера — темный фон */
#video-player-area {
  background: #1a1410;
  padding: 6px 8px 6px;
}

/* Нижняя свободная зона — фон как у текста, со скроллом для TOC */
#video-extra {
  background: var(--paper);
  flex: 1 1 0;
  overflow-y: auto;
  min-height: 0;
}
#toc-panel {
  padding: 4px 4px 4px;
}
/* В режиме external TOC возвращается в text-panel — стили не меняются */

/* Вкладки YT / RT */
#video-source-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 6px;
}
.vsrc-btn {
  flex: 1;
  padding: 3px 0;
  border: 1px solid #444;
  border-radius: 4px;
  background: #2a2420;
  color: #aaa;
  font-family: 'PT Serif', serif;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.vsrc-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
}
.vsrc-btn:hover:not(.active) {
  border-color: var(--gold-light);
  color: var(--gold-light);
}

/* Обертка: ограничивает высоту плеера в 50vh */
#video-container {
  position: relative;
  width: 100%;
  max-height: 35vh;
  /* Высота = min(ширина*9/16, 50vh) */
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 4px;
  overflow: hidden;
}
/* iframe занимает весь контейнер */
#video-frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

#video-hint {
  margin-top: 5px;
  font-size: 11px;
  color: #666;
  font-family: 'PT Serif', serif;
  font-style: italic;
  text-align: center;
  line-height: 1.4;
}
#video-hint .timecode {
  font-style: normal;
}

/* ── Режим embedded: показать видео-панель ── */
#app-layout.mode-embedded #video-panel {
  display: block;
}

/* ── Кнопка переключения режима ── */
#mode-toggle {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px 10px 14px;
  background: var(--accent);
  color: #f8f4ec;
  border: none;
  border-radius: 30px;
  font-family: 'PT Serif', serif;
  font-size: 14px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.30);
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}
#mode-toggle:hover {
  background: var(--gold);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.35);
}
#mode-toggle.ext-active {
  background: #2a5a3a;
}
#mode-toggle.ext-active:hover {
  background: #3a7a50;
}
#read-pct {
  font-size: 12px;
  opacity: 0.75;
  letter-spacing: 0;
}
#scroll-arrow {
  font-size: 12px;
  opacity: 0.75;
}
#scroll-arrow-link {
  color: #f8f4ec;
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  vertical-align: middle;
  margin-left: 4px;
}
#scroll-arrow-link:hover {
  color: var(--gold-light);
}
#mode-icon {
  font-size: 16px;
  line-height: 1;
}

/* ── Адаптив: на узких экранах видео уходит под текст ── */


/* Переносы не нужны в технических элементах */
.yt-link, a.yt-toc, a.rt-toc, .timecode,
#toc-panel, code, pre {
  hyphens: none;
  -webkit-hyphens: none;
}
/* ── TOC в режиме embedded: строчный список без заголовка ── */
#toc-panel .toc-title {
  display: none;
}
#toc-panel .toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  columns: 2;
  column-gap: 16px;
}
#toc-panel .toc-list li {
  display: block;
}
#toc-panel .toc-list li::after {
  content: '';
}
#toc-panel .toc-list li a:not(.yt-toc):not(.rt-toc):not(.audio-toc) {
  color: var(--ink);
  text-decoration: none;
}
#toc-panel .toc-list li a:not(.yt-toc):not(.rt-toc):not(.audio-toc):hover {
  text-decoration: underline;
}
#toc-panel {
  padding: 4px 4px 4px;
  font-size: 13px;
  line-height: 1.2;
}

/* ── Реплика ведущего внутри лекции ── */
p.interjection {
  margin: 1em 0;
  padding: 6px 16px;
  border-left: 2px solid var(--gold-light);
  font-size: 0.93em;
  color: var(--muted);
  font-style: italic;
}
p.interjection .interjection-speaker {
  font-style: normal;
  font-weight: 700;
  font-size: 0.82em;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gold);
  margin-right: 0.4em;
}
/* ── Аудио-контейнер ── */
#audio-container {
  display: none;
  padding: 12px 8px 8px;
}
#audio-player {
  width: 100%;
  height: 36px;
  accent-color: var(--gold);
}

/* По умолчанию (both) — оба видны, разделитель / виден */
.yt-link .link-sep,
.toc-list .link-sep { display: inline; }

/* Только YT */
body.links-yt-only a.rt-toc,
body.links-yt-only a.audio-toc,
body.links-yt-only .yt-link a[href*="rutube"] { display: none; }
body.links-yt-only .yt-link .link-sep,
body.links-yt-only .toc-list .link-sep { display: none; }

/* Только RT */
body.links-rt-only a.yt-toc,
body.links-rt-only a.audio-toc,
body.links-rt-only .yt-link a[href*="youtu"] { display: none; }
body.links-rt-only .yt-link .link-sep,
body.links-rt-only .toc-list .link-sep { display: none; }

/* Только Аудио */
body.links-audio-only a.yt-toc,
body.links-audio-only a.rt-toc,
body.links-audio-only .yt-link a[href*="youtu"],
body.links-audio-only .yt-link a[href*="rutube"] { display: none; }
body.links-audio-only .yt-link .link-sep,
body.links-audio-only .toc-list .link-sep { display: none; }
@media (max-width: 900px) {
  html, body {
    height: auto;
    overflow-y: auto;
  }

  #app-layout {
    display: block;
    min-height: unset;
    height: auto;
  }

  #text-panel {
    overflow-y: visible;
    height: auto;
  }

  /* Видео фиксировано вверху экрана */
  #video-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    border-left: none;
    border-bottom: 2px solid var(--rule);
    background: #1a1410;
    z-index: 100;
  }

  #video-sticky {
    position: static;
    height: auto;
  }

  #video-extra { display: none; }

  #mode-toggle { bottom: 16px; right: 16px; }
}