@font-face {
  font-family: 'JyutpingFont';
  src: url('../fonts/jyutping.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-FFFF;
}

:root {
  --bg-page:    #f7f5f0;
  --bg-card:    #ffffff;
  --bg-soft:    #efece4;
  --bg-hover:   #faf9f5;

  --text-1:     #1c1d2e;
  --text-2:     #5a5c70;
  --text-3:     #9295a8;

  --accent:     #4f46e5;
  --accent-2:   #6366f1;
  --accent-bg:  #eef2ff;
  --accent-soft:#c7d2fe;

  --gold:       #d97706;
  --gold-2:     #f59e0b;
  --gold-soft:  #fef3c7;

  --danger:     #f05252;
  --danger-bg:  #fef2f2;
  --success:    #16a34a;
  --success-bg: #f0fdf4;

  --grad-hero:   linear-gradient(135deg, #1e1b4b 0%, #4338ca 45%, #7c3aed 100%);
  --grad-accent: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --grad-gold:   linear-gradient(135deg, #d97706 0%, #f59e0b 100%);

  --shadow-sm:  0 1px 2px rgba(20,20,50,0.04), 0 1px 3px rgba(20,20,50,0.04);
  --shadow-md:  0 4px 14px rgba(20,20,50,0.06), 0 1px 4px rgba(20,20,50,0.04);
  --shadow-lg:  0 12px 32px rgba(20,20,50,0.10), 0 4px 12px rgba(20,20,50,0.06);
  --shadow-accent: 0 8px 24px rgba(79,70,229,0.25);
  --shadow-gold:   0 8px 24px rgba(217,119,6,0.20);

  --border:        rgba(28,29,46,0.06);
  --border-strong: rgba(28,29,46,0.12);

  --ease:        cubic-bezier(0.32, 0.72, 0, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

body {
  font-family: "SF Pro Display", "PingFang HK", "Noto Sans HK", "Microsoft YaHei", sans-serif;
  background: var(--bg-page);
  color: var(--text-1);
  line-height: 1.6;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(79,70,229,0.03) 0%, transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(217,119,6,0.03) 0%, transparent 40%);
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

/* ============ Liquid Glass components ============ */
.glass-card {
  background: rgba(255,255,255,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid rgba(255,255,255,0.60);
  border-radius: 20px;
  box-shadow:
    0 4px 24px rgba(20,20,50,0.06),
    0 1px 3px rgba(20,20,50,0.04),
    inset 0 1px 0 rgba(255,255,255,0.80);
}

.glass-dark {
  background: rgba(30,27,75,0.55);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.20), inset 0 1px 0 rgba(255,255,255,0.10);
}

.glass-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(239,237,232,0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border: 1px solid rgba(255,255,255,0.60);
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  padding: 8px 18px;
  color: var(--text-1);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 120ms var(--ease);
  user-select: none;
}
.glass-pill:hover { background: rgba(239,237,232,0.95); }
.glass-pill.active {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-accent);
}

/* ============ Layout ============ */
.main-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  background: var(--grad-hero);
  color: #fff;
  padding: 56px 0 64px;
  overflow: hidden;
  margin-bottom: 24px;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 30%, rgba(255,255,255,0.10) 0%, transparent 30%),
    radial-gradient(circle at 85% 70%, rgba(245,158,11,0.15) 0%, transparent 35%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero__brand {
  display: flex;
  align-items: center;
  gap: 18px;
}

.hero__logo {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: var(--grad-gold);
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
  box-shadow: var(--shadow-gold), inset 0 1px 0 rgba(255,255,255,0.30);
}

.hero__title {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.hero__title-en {
  font-weight: 400;
  opacity: 0.78;
  margin-left: 6px;
  font-size: 0.85em;
}
.hero__slogan {
  color: rgba(255,255,255,0.78);
  font-size: 1rem;
  font-weight: 400;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: transform 120ms var(--ease), box-shadow 120ms var(--ease), background 120ms var(--ease);
}
.hero-btn:active { transform: scale(0.97); }

.hero-btn--primary {
  background: #fff;
  color: var(--accent);
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
}
.hero-btn--primary:hover { box-shadow: 0 10px 28px rgba(0,0,0,0.24); }

.hero-btn--ghost {
  background: rgba(255,255,255,0.14);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.hero-btn--ghost:hover { background: rgba(255,255,255,0.22); }

/* ============ Toolbar ============ */
.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 24px;
}

/* ============ Chapters ============ */
.chapters {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-bottom: 120px;
}

.chapter {
  overflow: hidden;
  transition: box-shadow 240ms var(--ease);
}
.chapter:hover { box-shadow: var(--shadow-lg); }

.chapter__header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  transition: background 200ms var(--ease);
}
.chapter__header:hover { background: rgba(255,255,255,0.4); }

.chapter__index {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--accent-bg);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.875rem;
}

.chapter__title-wrap {
  flex: 1;
  min-width: 0;
}
.chapter__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.005em;
}
.chapter__subtitle {
  font-size: 0.8125rem;
  color: var(--text-3);
  margin-top: 2px;
}

.chapter__arrow {
  flex-shrink: 0;
  color: var(--text-3);
  font-size: 0.9rem;
  transition: transform 320ms var(--ease-bounce);
}
.chapter.open .chapter__arrow { transform: rotate(90deg); color: var(--accent); }

.chapter__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 320ms var(--ease-bounce);
}
.chapter__body-inner {
  padding: 0 24px 24px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ============ Blocks ============ */
.block {
  position: relative;
  padding: 14px 12px;
  border-radius: 12px;
  transition: background 200ms var(--ease);
}
.block + .block { margin-top: 4px; }
.block:hover { background: var(--bg-hover); }

.block.playing {
  background: var(--accent-bg);
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  border-radius: 8px;
  transition: all 200ms var(--ease);
}

.block--narration,
.block--dialogue {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  align-items: start;
  cursor: pointer;
}

.block__text { min-width: 0; }

.speaker {
  display: inline-block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
}

.cantonese {
  font-family: 'JyutpingFont', "SF Pro Display", "PingFang HK", "Noto Sans HK", "Microsoft YaHei", sans-serif;
  font-size: 1.125rem;
  color: var(--text-1);
  font-weight: 500;
  line-height: 1.7;
}

.mandarin {
  display: block;
  font-size: 0.875rem;
  color: var(--text-3);
  font-weight: 400;
  margin-top: 4px;
  line-height: 1.55;
}

.play-btn {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--bg-soft);
  color: var(--accent);
  font-size: 1rem;
  transition: all 120ms var(--ease);
}
.play-btn:hover { background: var(--accent); color: #fff; transform: scale(1.06); }
.play-btn:active { transform: scale(0.94); }
.play-btn.muted { background: var(--bg-soft); color: var(--text-3); cursor: not-allowed; }
.play-btn.muted:hover { transform: none; background: var(--bg-soft); color: var(--text-3); }

.block--note {
  background: var(--gold-soft);
  border: 1px solid rgba(217,119,6,0.18);
  border-radius: 14px;
  padding: 14px 18px;
  margin-top: 8px;
}
.block--note__title {
  font-size: 0.8125rem;
  color: var(--gold);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.note-list { display: grid; gap: 8px; }
.note-list dt { display: none; }
.note-item {
  display: grid;
  grid-template-columns: minmax(80px, max-content) 1fr;
  gap: 4px 12px;
  align-items: baseline;
}
.note-term {
  font-family: 'JyutpingFont', "SF Pro Display", "PingFang HK", "Noto Sans HK", "Microsoft YaHei", sans-serif;
  font-size: 0.9375rem;
  color: var(--gold);
  font-weight: 600;
}
.note-def {
  font-size: 0.875rem;
  color: var(--text-2);
  font-weight: 400;
  line-height: 1.55;
}

/* loading + error inline */
.chapter__loading {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 12px;
  color: var(--text-3);
  font-size: 0.875rem;
}
.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--accent-soft);
  border-top-color: var(--accent);
  animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.chapter__error {
  padding: 16px 12px;
  background: var(--danger-bg);
  color: var(--danger);
  border-radius: 10px;
  font-size: 0.875rem;
}

.global-error {
  margin: 16px 0 32px;
  padding: 14px 18px;
  background: var(--danger-bg);
  color: var(--danger);
  border-radius: 12px;
  font-size: 0.9375rem;
}

/* ============ Immersion mode ============ */
body.immersion-mode .mandarin,
body.immersion-mode .block--note {
  display: none;
}

/* ============ Player bar ============ */
.player-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(247,245,240,0.88);
  backdrop-filter: saturate(200%) blur(24px);
  -webkit-backdrop-filter: saturate(200%) blur(24px);
  border-top: 1px solid rgba(255,255,255,0.70);
  box-shadow: 0 -1px 0 rgba(28,29,46,0.06), 0 -8px 24px rgba(20,20,50,0.04);
  transform: translateY(100%);
  transition: transform 400ms var(--ease-spring);
  padding-bottom: env(safe-area-inset-bottom);
}
.player-bar.visible { transform: translateY(0); }

.player-bar__progress {
  height: 3px;
  background: rgba(28,29,46,0.08);
  position: relative;
  overflow: hidden;
}
.player-bar__progress-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  background: var(--grad-accent);
  transition: width 120ms linear;
}

.player-bar__body {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
}

.player-bar__info {
  flex: 1;
  min-width: 0;
}
.player-bar__chapter {
  font-size: 0.75rem;
  color: var(--text-3);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.player-bar__text {
  font-size: 0.9375rem;
  color: var(--text-1);
  font-weight: 500;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-bar__controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.player-btn {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: var(--text-2);
  font-size: 0.9375rem;
  transition: all 120ms var(--ease);
}
.player-btn:hover { background: rgba(28,29,46,0.06); color: var(--text-1); }
.player-btn:active { transform: scale(0.92); }
.player-btn.active { color: var(--accent); background: var(--accent-bg); }

.player-btn--main {
  width: 44px;
  height: 44px;
  background: var(--grad-accent);
  color: #fff !important;
  box-shadow: var(--shadow-accent);
  font-size: 1rem;
}
.player-btn--main:hover { background: var(--grad-accent); transform: scale(1.05); }

.player-bar__time {
  font-size: 0.8125rem;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  min-width: 40px;
  text-align: right;
}

/* ============ Footer ============ */
.site-footer {
  padding: 24px 0 32px;
  color: var(--text-3);
  font-size: 0.8125rem;
  text-align: center;
}

/* ============ Responsive ============ */
@media (max-width: 1023px) {
  .main-content { max-width: 90vw; }
}

@media (max-width: 767px) {
  .main-content { max-width: 100%; padding: 0 16px; }
  .hero { padding: 40px 0 48px; }
  .hero__title { font-size: 1.5rem; }
  .hero__logo { width: 52px; height: 52px; font-size: 1.4rem; }
  .play-btn { min-width: 44px; min-height: 44px; }
  .chapter__title { font-size: 1.1rem; }
  .chapter__header { padding: 16px 18px; }
  .chapter__body-inner { padding: 12px 16px 18px; }
  .player-bar__body { padding: 10px 16px; gap: 10px; }
  .player-bar__text { font-size: 0.875rem; }
  .player-bar__time { display: none; }
  .player-btn { width: 36px; height: 36px; }
  .player-btn--main { width: 42px; height: 42px; }
}