/* Kino „Lesson Deck im Unterricht“: alle Folgen der Serie auf der Lesson-Deck-Seite.
   Aufbau aus build-pages.mjs (cinema), Ablauf in kino.js. Farben kommen aus der
   Farbwelt der Seite (--detail-*), Maße aus system.css (--la-*). */
.kino {
  position: relative;
  isolation: isolate;
  padding-block: var(--la-section, 5rem);
  background:
    radial-gradient(60rem 30rem at 85% 0%, color-mix(in srgb, var(--detail-accent) 14%, transparent), transparent 70%),
    var(--detail-bg);
  color: var(--detail-ink, #fffdf8);
  overflow: clip;
}
.kino-head h2 { margin: .5rem 0 0; max-width: 18ch; text-wrap: balance; }

.kino-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  margin-top: clamp(1.6rem, 3vw, 2.6rem);
}
.kino-screen { margin: 0; min-width: 0; }
.kino-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--detail-line, #ffffff26);
  border-radius: var(--la-radius-l, 28px);
  background: #f6f3ea;
  box-shadow: 0 50px 90px -50px #000, 0 0 0 8px color-mix(in srgb, var(--detail-accent) 7%, transparent);
}
.kino-frame img,
.kino-frame video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.kino-frame video { opacity: 0; transition: opacity .4s ease; }
.kino-frame.is-playing video { opacity: 1; }

/* Startknopf in der Bildmitte: nur sichtbar, solange der Film angehalten ist. */
.kino-play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  width: 100%;
  border: 0;
  background: #10141a59;
  cursor: pointer;
}
.kino-play span { display: grid; place-items: center; width: 4.6rem; height: 4.6rem; border-radius: 50%; background: var(--detail-accent); transition: transform .2s ease; }
.kino-play span::before { content: ""; margin-left: .3rem; border-block: .62rem solid transparent; border-left: 1.05rem solid var(--detail-bg); }
.kino-play:hover span { transform: scale(1.07); }
/* Pausenknopf neben den Pfeilen. */
.kino-toggle span { display: block; width: .78rem; height: .95rem; margin: auto; border-inline: .25rem solid currentColor; }
.kino-toggle.is-held span { width: 0; height: 0; border-block: .48rem solid transparent; border-left: .8rem solid currentColor; border-right: 0; transform: translateX(.1rem); }

.kino-progress { position: relative; height: 4px; margin-top: 1rem; border-radius: 4px; background: var(--detail-line, #ffffff26); cursor: pointer; touch-action: none; transition: height .2s ease; }
/* Größere Trefffläche, als der Balken hoch ist. */
.kino-progress::before { content: ""; position: absolute; inset: -14px 0; }
/* Griff an der aktuellen Stelle. */
.kino-progress::after { content: ""; position: absolute; top: 50%; left: calc(var(--p, 0) * 100%); width: 14px; height: 14px; margin: -7px 0 0 -7px; border-radius: 50%; background: var(--detail-accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--detail-accent) 25%, transparent); transform: scale(0); transition: transform .2s ease; }
.kino-progress:is(:hover, :focus-visible, .is-seeking) { height: 6px; }
.kino-progress:is(:hover, :focus-visible, .is-seeking)::after { transform: scale(1); }
.kino-progress.is-seeking i { transition: none; }
@media (hover: none) { .kino-progress { height: 6px; } .kino-progress::after { transform: scale(1); } }
.kino-progress i { display: block; width: 100%; height: 100%; border-radius: inherit; background: var(--detail-accent); transform-origin: left; transform: scaleX(var(--p, 0)); transition: transform .3s linear; }

.kino-now { min-width: 0; }
.kino-part { margin: 0; color: var(--detail-accent); font: 700 .8rem/1.2 var(--heading); letter-spacing: .14em; text-transform: uppercase; }
.kino-number {
  margin: .5rem 0 .7rem;
  font: 800 clamp(5rem, 11vw, 10rem)/.82 var(--heading);
  letter-spacing: -.06em;
  color: var(--detail-bg);
  -webkit-text-stroke: 3px var(--detail-accent);
  paint-order: stroke fill;
}
.kino-title { margin: 0; font: 700 clamp(1.5rem, 2.5vw, 2.3rem)/1.12 var(--heading); letter-spacing: -.03em; text-wrap: balance; }
.kino-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1rem; margin: 1.5rem 0 0; }
.kino .kino-youtube { order: 2; color: inherit; }
.kino-steps { display: inline-flex; gap: .5rem; }
.kino-steps button {
  width: var(--la-button, 3rem);
  height: var(--la-button, 3rem);
  border: 1px solid var(--detail-line, #ffffff40);
  border-radius: 50%;
  background: transparent;
  color: inherit;
  font-size: 1.15rem;
  cursor: pointer;
  transition: border-color .2s ease, transform .2s ease;
}
.kino-steps button:hover { border-color: var(--detail-accent); transform: translateY(-2px); }

/* Teile der Serie und Folgenleiste. */
.kino-parts { display: flex; gap: .5rem; margin-top: clamp(2rem, 4vw, 3rem); overflow-x: auto; scrollbar-width: none; }
.kino-parts::-webkit-scrollbar { display: none; }
.kino-parts button {
  flex: none;
  min-height: var(--la-button-s, 2.5rem);
  padding: 0 1rem;
  border: 1px solid var(--detail-line, #ffffff40);
  border-radius: 99px;
  background: transparent;
  color: inherit;
  font: 700 .92rem/1 var(--heading);
  cursor: pointer;
  transition: background .25s ease, color .25s ease, border-color .25s ease;
}
.kino-parts button span { margin-right: .3em; color: var(--detail-accent); }
.kino-parts button[aria-current="true"] { background: var(--detail-accent); border-color: transparent; color: var(--detail-bg); }
.kino-parts button[aria-current="true"] span { color: inherit; }

.kino-rail {
  display: flex;
  gap: 1rem;
  margin: 1rem 0 0;
  padding: .4rem 0 1rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--detail-line, #ffffff40) transparent;
}
.kino-rail li { flex: 0 0 clamp(11.5rem, 17vw, 15rem); scroll-snap-align: start; }
.kino-tile { display: block; width: 100%; padding: 0; border: 0; background: none; color: inherit; text-align: left; cursor: pointer; }
.kino-tile img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border: 2px solid transparent;
  border-radius: var(--la-radius-s, 10px);
  opacity: .62;
  transition: opacity .3s ease, border-color .3s ease, transform .3s cubic-bezier(.2, .7, .2, 1);
}
.kino-tile:hover img { opacity: 1; transform: translateY(-3px); }
.kino-tile[aria-current="true"] img { opacity: 1; border-color: var(--detail-accent); }
.kino-tile-nr { display: block; margin-top: .6rem; color: var(--detail-accent); font: 800 .82rem/1 var(--heading); letter-spacing: .06em; }
.kino-tile-title { display: block; margin-top: .25rem; font: 600 .92rem/1.25 var(--heading); color: var(--detail-muted, #d5dfe2); }
.kino-tile[aria-current="true"] .kino-tile-title { color: inherit; }
.kino-all { margin: .8rem 0 0; }

.kino :is(button, a):focus-visible { outline: 2px solid var(--detail-accent); outline-offset: 3px; }

/* Wechsel der Folge: Nummer und Titel steigen kurz ein. */
@media (prefers-reduced-motion: no-preference) {
  @keyframes kino-in { from { opacity: 0; transform: translateY(.6rem); } to { opacity: 1; transform: none; } }
  .kino-now.is-in > * { animation: kino-in .5s cubic-bezier(.2, .7, .2, 1) backwards; }
  .kino-now.is-in > :nth-child(2) { animation-delay: .05s; }
  .kino-now.is-in > :nth-child(3) { animation-delay: .1s; }
  .kino-now.is-in > :nth-child(4) { animation-delay: .16s; }
}

@media (max-width: 760px) {
  .kino-stage { grid-template-columns: 1fr; gap: 1.2rem; }
  /* Am Handy läuft die Quadratfassung: große Schrift, Ausschnitt nah am Geschehen. */
  .kino-frame { aspect-ratio: 1; border-radius: var(--la-radius-m, 16px); }
  .kino-now { display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: .9rem; align-items: center; }
  .kino-part { grid-column: 1 / -1; }
  .kino-number { margin: .5rem 0; font-size: 3.6rem; -webkit-text-stroke-width: 2px; }
  .kino-title { font-size: 1.25rem; }
  .kino-actions { grid-column: 1 / -1; margin-top: 1rem; }
  .kino-rail li { flex-basis: 9.5rem; }
  .kino-tile-title { font-size: .84rem; }
}

/* ── Die Stunde in Szenen (#stunde) ──
   Je Szene ein Bild des Klassenraums, links Situation und Schalter, rechts der Film. */
.stunde { background: var(--detail-bg); color: var(--detail-ink, #fffdf8); }
.stunde-head { padding-block: var(--la-section, 5rem) clamp(1.5rem, 3vw, 2.5rem); }
.stunde-head h2 { margin: .5rem 0 0; max-width: 20ch; text-wrap: balance; }

/* Der rote Faden: Stationen der Stunde, bleiben beim Scrollen oben stehen. */
.stunde-road { position: sticky; top: 3.3rem; z-index: 5; background: color-mix(in srgb, var(--detail-bg) 88%, transparent); backdrop-filter: blur(10px); border-block: 1px solid var(--detail-line, #ffffff26); }
.stunde-road-inner { display: flex; gap: 0; overflow-x: auto; scrollbar-width: none; }
.stunde-road-inner::-webkit-scrollbar { display: none; }
.stunde-road a {
  position: relative;
  flex: 1 0 auto;
  display: flex;
  align-items: center;
  gap: .55rem;
  min-height: 3rem;
  padding: 0 1.1rem 0 0;
  color: var(--detail-muted, #d5dfe2);
  font: 700 .86rem/1 var(--heading);
  text-decoration: none;
  white-space: nowrap;
  transition: color .3s ease;
}
.stunde-road a b { display: grid; place-items: center; width: 1.5rem; height: 1.5rem; border: 1.5px solid currentColor; border-radius: 50%; font-size: .74rem; transition: background .3s ease, color .3s ease, border-color .3s ease; }
/* Verbindung zur nächsten Station. */
.stunde-road a::after { content: ""; flex: 1 1 1.2rem; min-width: 1.2rem; height: 2px; margin-left: .55rem; background: var(--detail-line, #ffffff33); transition: background .3s ease; }
.stunde-road a:last-child::after { display: none; }
.stunde-road a[data-done] { color: var(--detail-ink, #fffdf8); }
.stunde-road a[data-done] b { background: var(--detail-accent); border-color: var(--detail-accent); color: var(--detail-bg); }
.stunde-road a[data-done]::after { background: var(--detail-accent); }
.stunde-road a[aria-current="step"] { color: var(--detail-accent); }
.stunde-road a[aria-current="step"] b { background: var(--detail-accent); border-color: var(--detail-accent); color: var(--detail-bg); box-shadow: 0 0 0 5px color-mix(in srgb, var(--detail-accent) 22%, transparent); }

.szene { position: relative; isolation: isolate; display: grid; align-items: center; min-height: min(92svh, 54rem); padding-block: clamp(3rem, 7vw, 5.5rem); overflow: clip; scroll-margin-top: 6rem; }
.szene::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, var(--detail-bg) 0%, color-mix(in srgb, var(--detail-bg) 84%, transparent) 42%, color-mix(in srgb, var(--detail-bg) 52%, transparent) 100%),
    linear-gradient(0deg, var(--detail-bg) 0%, transparent 22%, transparent 78%, var(--detail-bg) 100%),
    var(--szene-art) var(--szene-shift, 50%) center / cover no-repeat;
}
.szene-stage { grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); margin-top: 0; }
.szene-kicker { display: flex; align-items: center; gap: .6rem; margin: 0; color: var(--detail-accent); font: 700 .8rem/1.2 var(--heading); letter-spacing: .14em; text-transform: uppercase; }
.szene-kicker b { display: grid; place-items: center; width: 1.7rem; height: 1.7rem; border-radius: 50%; background: var(--detail-accent); color: var(--detail-bg); letter-spacing: 0; }
.szene h3 { margin: .9rem 0 0; font: 800 clamp(2.2rem, 4.6vw, 4rem)/1.02 var(--heading); letter-spacing: -.045em; text-wrap: balance; }
.szene-satz { margin: 1rem 0 0; max-width: 34ch; color: var(--detail-muted, #d5dfe2); font-size: var(--la-lead, 1.12rem); line-height: 1.5; }
.szene-switches { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.6rem; }
.szene-switch {
  width: auto;
  min-height: var(--la-button-s, 2.5rem);
  padding: 0 1rem;
  border: 1px solid var(--detail-line, #ffffff40);
  border-radius: 99px;
  background: color-mix(in srgb, var(--detail-bg) 60%, transparent);
  color: inherit;
  font: 700 .92rem/1 var(--heading);
  text-align: center;
  transition: background .25s ease, color .25s ease, border-color .25s ease, transform .25s ease;
}
.szene-switch:hover { border-color: var(--detail-accent); transform: translateY(-2px); }
.szene-switch[aria-current="true"] { background: var(--detail-accent); border-color: transparent; color: var(--detail-bg); }
.szene-meta { display: flex; align-items: center; gap: .9rem; margin-top: .9rem; }
.szene-meta .kino-progress { flex: 1 1 auto; margin-top: 0; }
.szene-toggle { flex: none; width: 2.5rem; height: 2.5rem; border: 1px solid var(--detail-line, #ffffff40); border-radius: 50%; background: transparent; color: inherit; cursor: pointer; }
.szene-toggle:hover { border-color: var(--detail-accent); }
/* Nebenszene: kleiner und stiller. */
.szene-klein { min-height: 0; }
.szene-klein h3 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
.szene-klein .szene-stage { grid-template-columns: minmax(0, 1fr) minmax(0, .8fr); }

@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    @keyframes szene-in { from { opacity: 0; transform: translateY(2.4rem); } }
    .szene-copy > *, .szene-screen { animation: szene-in linear both; animation-timeline: view(); animation-range: entry 5% entry 55%; }
    .szene-copy > :nth-child(2) { animation-range: entry 10% entry 60%; }
    .szene-copy > :nth-child(3) { animation-range: entry 15% entry 65%; }
    .szene-copy > :nth-child(4) { animation-range: entry 20% entry 70%; }
    .szene-screen { animation-range: entry 12% entry 70%; }
  }
}

@media (max-width: 760px) {
  .stunde-road { top: 3.2rem; }
  .stunde-road a { padding-right: .7rem; font-size: .8rem; }
  .szene { min-height: 0; }
  .szene::before {
    background:
      linear-gradient(0deg, var(--detail-bg) 0%, color-mix(in srgb, var(--detail-bg) 70%, transparent) 45%, color-mix(in srgb, var(--detail-bg) 82%, transparent) 100%),
      var(--szene-art-hoch) center / cover no-repeat;
  }
  .szene-stage, .szene-klein .szene-stage { grid-template-columns: 1fr; gap: 1.4rem; }
  .szene h3 { font-size: clamp(2rem, 9vw, 2.6rem); }
  .szene-switches { flex-wrap: nowrap; margin-inline: -1rem; padding-inline: 1rem; overflow-x: auto; scrollbar-width: none; }
  .szene-switches::-webkit-scrollbar { display: none; }
  .szene-switch { flex: none; }
}
/* Die Szenen nutzen die Kino-Bühne, aber nicht deren Handy-Raster für Nummer und Titel. */
.szene .szene-copy { display: block; }

/* Szenenbilder im Stil B (Glasflächen auf Nachtblau, Codex 12.11.): Am Handy bleiben
   die Glaskanten neben und unter dem Film sichtbar (Werte aus QUELLEN.md der Lieferung). */
@media (max-width: 760px) {
  .szene { padding-block-end: 8rem; }
  .szene::before {
    background:
      linear-gradient(0deg, var(--detail-bg), color-mix(in srgb, var(--detail-bg) 16%, transparent) 17%, color-mix(in srgb, var(--detail-bg) 24%, transparent) 41%, color-mix(in srgb, var(--detail-bg) 62%, transparent) 70%, color-mix(in srgb, var(--detail-bg) 84%, transparent)),
      var(--szene-art-hoch) center / cover no-repeat;
  }
  .detail-page[data-product="lesson-deck"] .detail-art { object-position: 78% center; }
}

/* Breite Bildschirme: Das Szenenbild rückt nach links oben, damit die Glasflächen
   zwischen Text und Film und über dem Film hervorschauen, statt dahinter zu verschwinden. */
@media (min-width: 761px) {
  .szene::before {
    inset: -12% 0 -12% -6%;
    background: var(--szene-art) center / cover no-repeat;
    transform: translate(-21%, -9%) scale(1.12);
  }
  .szene::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
      linear-gradient(90deg, var(--detail-bg) 0%, color-mix(in srgb, var(--detail-bg) 62%, transparent) 30%, transparent 52%),
      linear-gradient(0deg, var(--detail-bg) 0%, transparent 16%, transparent 86%, var(--detail-bg) 100%);
  }
  .szene-stage { grid-template-columns: minmax(0, .8fr) minmax(0, 1fr); align-items: end; }
  .szene-screen { margin-top: clamp(4rem, 10vw, 9rem); }
}

/* Lesson Deck: Die Szenen ersetzen die Scroll-Reise (12.11.). Die Daten der Reise
   bleiben für Kopfbild und „Das steckt drin“ erhalten, der Abschnitt selbst entfällt. */
.detail-page[data-product="lesson-deck"] #reise { display: none; }

/* Bildleiste unter dem Film: vier Stellen der Folge als Bilder. Sie klappen beim
   Wechsel nacheinander auf; ein Klick springt im Film dorthin. */
.szene-schritte { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .7rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.szene-schritte button { position: relative; display: block; width: 100%; padding: 0; border: 0; border-radius: var(--la-radius-s, 10px); background: none; cursor: pointer; overflow: hidden; }
.szene-schritte img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; border-radius: inherit; opacity: .78; transition: opacity .3s ease, transform .4s cubic-bezier(.2, .7, .2, 1); }
.szene-schritte span { position: absolute; left: .45rem; top: .45rem; display: grid; place-items: center; width: 1.45rem; height: 1.45rem; border-radius: 50%; background: #0a1929d9; color: #fffdf8; font: 700 .74rem/1 var(--heading); transition: background .3s ease, color .3s ease; }
.szene-schritte button::after { content: ""; position: absolute; inset: 0; border: 2px solid transparent; border-radius: inherit; transition: border-color .3s ease; }
.szene-schritte button:hover img { opacity: 1; transform: scale(1.04); }
.szene-schritte .is-current img { opacity: 1; }
.szene-schritte .is-current button::after { border-color: var(--detail-accent); }
.szene-schritte .is-current span { background: var(--detail-accent); color: var(--detail-bg); }
@media (prefers-reduced-motion: no-preference) {
  @keyframes schritt-auf { from { opacity: 0; clip-path: inset(0 0 100% 0 round 10px); transform: translateY(-.6rem); } to { opacity: 1; clip-path: inset(0 0 0 0 round 10px); transform: none; } }
  .szene-schritte li { animation: schritt-auf .55s cubic-bezier(.2, .7, .2, 1) calc(.08s + var(--step) * .09s) backwards; }
}
@media (max-width: 760px) {
  .szene-schritte { gap: .45rem; }
  .szene-schritte span { left: .3rem; top: .3rem; width: 1.2rem; height: 1.2rem; font-size: .66rem; }
}