@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700&family=Space+Grotesk:wght@400;500;600&display=swap");

:root,
html[data-theme="light"] {
  --bg: #f3efe6;
  --ink: #1b1a24;
  --muted: #5c5868;
  --paper: #fffdf8;
  --line: #d9d2c6;
  --teal: #4f46e5;
  --teal-ink: #312e81;
  --stage: #11121c;
  --gold: #c9a227;
  --warn: #8a4b00;
  --active: #ece7ff;
  --chip: #2a3144;
  --chip-ink: #eef1ff;
  --header: rgba(255, 253, 248, 0.92);
  --star-opacity: 0;
  --nebula: none;
  --glass: #fffdf8;
  --focus: #4f46e5;
}

html[data-theme="dark"] {
  --bg: #05060f;
  --ink: #eef0ff;
  --muted: #a8b0d4;
  --paper: rgba(16, 18, 42, 0.72);
  --line: rgba(186, 176, 255, 0.2);
  --teal: #9ae6ff;
  --teal-ink: #c4b5fd;
  --stage: transparent;
  --gold: #f5d06f;
  --warn: #ffb4a2;
  --active: rgba(124, 77, 255, 0.28);
  --chip: rgba(28, 32, 68, 0.88);
  --chip-ink: #eef0ff;
  --header: rgba(8, 10, 24, 0.78);
  --star-opacity: 1;
  --nebula:
    radial-gradient(ellipse 70% 45% at 8% 0%, rgba(109, 40, 217, 0.38), transparent 55%),
    radial-gradient(ellipse 55% 40% at 92% 8%, rgba(37, 99, 235, 0.32), transparent 50%),
    radial-gradient(ellipse 50% 40% at 80% 100%, rgba(14, 165, 233, 0.18), transparent 55%),
    radial-gradient(ellipse 40% 30% at 20% 90%, rgba(168, 85, 247, 0.18), transparent 50%);
  --glass: rgba(12, 14, 36, 0.62);
  --focus: #f5d06f;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
}

body {
  font-family: "Noto Sans TC", "PingFang TC", "Hiragino Sans GB", sans-serif;
  font-size: 1.02rem;
  line-height: 1.65;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: var(--nebula);
}

.starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: var(--star-opacity);
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255,255,255,.9), transparent),
    radial-gradient(1px 1px at 28% 72%, rgba(255,255,255,.55), transparent),
    radial-gradient(1.5px 1.5px at 63% 22%, rgba(255,255,255,.85), transparent),
    radial-gradient(1px 1px at 81% 58%, rgba(210,230,255,.7), transparent),
    radial-gradient(1px 1px at 47% 41%, rgba(255,255,255,.45), transparent),
    radial-gradient(1.8px 1.8px at 91% 14%, #f5d06f, transparent),
    radial-gradient(1px 1px at 7% 88%, rgba(154,230,255,.7), transparent),
    radial-gradient(1px 1px at 73% 91%, rgba(255,255,255,.4), transparent);
  background-size: 100% 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html[data-theme="dark"] .starfield {
    animation: drift 80s linear infinite;
  }
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-2%, -1%, 0); }
}

.wrap, .site-header, .layout, #gate, #app {
  position: relative;
  z-index: 1;
}

a { color: var(--teal); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.wrap {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 80px;
}

header h1 {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  line-height: 1.25;
  margin: 0 0 8px;
}

.lede { color: var(--muted); margin: 0 0 24px; max-width: 42rem; }

.card {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px 22px;
  margin-bottom: 18px;
  backdrop-filter: blur(16px);
}

.list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }

.row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
}

.meta { display: block; color: var(--muted); font-size: 0.92rem; }

.open, .ghost, .chip, .icon-btn, .seg button, .gate-form button, .chapter-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 0;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.open {
  background: linear-gradient(135deg, #7c3aed, #2563eb);
  color: #fff;
  font-weight: 700;
}

.open:hover { filter: brightness(1.08); }

.ghost, .icon-btn, .chapter-toggle {
  background: var(--chip);
  color: var(--chip-ink);
}

html[data-theme="light"] .ghost,
html[data-theme="light"] .icon-btn,
html[data-theme="light"] .chapter-toggle {
  background: #efe8da;
  color: var(--ink);
}

.icon-btn {
  width: 44px;
  padding: 0;
}

.icon-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; }

.seg {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(0,0,0,.18);
}

.seg button {
  min-height: 40px;
  background: transparent;
  color: var(--muted);
}

.seg button[aria-pressed="true"] {
  background: var(--gold);
  color: #1b1404;
}

#gate {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 50% 20%, rgba(109, 40, 217, 0.45), transparent 60%),
    #05060f;
  color: #f2e4c8;
  display: none;
  place-items: center;
  z-index: 50;
  padding: 24px;
}

#gate.open { display: grid; }

.gate-form {
  display: grid;
  gap: 12px;
  width: min(380px, 100%);
}

.gate-form h1 { margin: 0; font-size: 1.5rem; color: #fff; }
.gate-form p { margin: 0; color: #d5c7a8; }
.gate-form label { color: #d5c7a8; }
.gate-form input {
  font: inherit;
  min-height: 48px;
  border-radius: 14px;
  border: 0;
  padding: 0 14px;
}
.gate-form button {
  background: var(--gold);
  color: #1b1404;
  font-weight: 700;
}
.gate-err { color: #ffb4a2; margin: 0; }

.site-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 8px 14px;
  background: var(--header);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
}

.site-header h1 {
  font-size: 1rem;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  height: calc(100vh - 61px);
}

.stage {
  background: var(--stage);
  padding: 10px 12px 12px;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 8px;
  min-width: 0;
}

.player-frame {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 220px;
  background: #000;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(255,255,255,.08), 0 18px 50px rgba(76, 29, 149, 0.28);
}

.player-frame iframe,
.player-frame > div {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  border: 0;
}

.icon-moon, .icon-sun { display: none; }
html[data-theme="dark"] .icon-sun { display: block; }
html[data-theme="light"] .icon-moon { display: block; }

.chapter-dock {
  display: grid;
  gap: 8px;
}

.chapter-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.chapter-now {
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--chip);
  color: var(--chip-ink);
  font-family: "Space Grotesk", "Noto Sans TC", sans-serif;
  font-size: 0.92rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chapter-nav {
  display: none;
  flex-wrap: wrap;
  gap: 6px;
}

.chapter-dock.open .chapter-nav {
  display: flex;
}

.chip {
  background: var(--chip);
  color: var(--chip-ink);
  white-space: nowrap;
  min-height: 36px;
  font-size: 0.88rem;
  padding: 6px 12px;
}

.chip[aria-current="true"] {
  background: var(--gold);
  color: #1b1404;
}

.transcript {
  padding: 12px 14px 48px;
  overflow-y: auto;
  height: calc(100vh - 61px);
  background: var(--glass);
  border-left: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.section { margin: 0 0 22px; }

.section h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  letter-spacing: 0.01em;
}

.para {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: var(--paper);
  border-radius: 12px;
  padding: 10px 12px;
  margin: 0 0 8px;
  cursor: pointer;
  color: inherit;
  font: inherit;
}

.para:hover { border-color: var(--line); }

.para.active {
  background: var(--active);
  border-color: rgba(245, 208, 111, 0.55);
  box-shadow: 0 0 0 1px rgba(245, 208, 111, 0.25);
}

.time {
  font-family: "Space Grotesk", ui-monospace, sans-serif;
  font-variant-numeric: tabular-nums;
  color: var(--teal);
  font-weight: 600;
  font-size: 0.86rem;
}

.zh { margin: 4px 0 6px; font-size: 1.02rem; }

.en {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  font-family: "Space Grotesk", ui-monospace, "SF Mono", sans-serif;
  white-space: pre-wrap;
}

body[data-lang="zh"] .en { display: none; }
body[data-lang="en"] .zh { display: none; }

footer.note {
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.92rem;
}

.catalog-top {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
    height: auto;
  }
  .stage {
    position: sticky;
    top: 57px;
    z-index: 8;
    grid-template-rows: auto auto;
  }
  .player-frame {
    aspect-ratio: 16 / 9;
    height: auto;
  }
  .transcript {
    height: auto;
    overflow: visible;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .site-header {
    grid-template-columns: auto minmax(0, 1fr);
  }
  .header-actions { grid-column: 1 / -1; justify-content: flex-end; }
  .row { grid-template-columns: 1fr; }
  .open { justify-self: start; }
}