/* ── Genetics Audiobook v2 Styles ── */
:root {
  --bg: #fdfbf7;
  --card-bg: #ffffff;
  --text: #2d2a26;
  --text-secondary: #6b6560;
  --accent: #1a5276;
  --accent-soft: #2980b9;
  --border: #e8e3db;
  --highlight: #fff8e1;
  --highlight-active: #ffecb3;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-hover: 0 6px 24px rgba(0,0,0,0.10);
  --radius: 14px;
  --font-heading: "Georgia", "Times New Roman", "Noto Serif SC", serif;
  --font-body: -apple-system, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.header {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: #fff;
  padding: 28px 32px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.header h1 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 400;
}
.header .v2-badge {
  font-size: 11px;
  background: #f0d78c;
  color: #1a1a2e;
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.header a.back-link {
  color: #f0d78c;
  text-decoration: none;
  font-size: 14px;
  padding: 6px 16px;
  border: 1px solid rgba(240,215,140,0.4);
  border-radius: 20px;
  transition: all 0.2s;
}
.header a.back-link:hover {
  background: rgba(240,215,140,0.12);
  border-color: #f0d78c;
}
.disclaimer {
  text-align: center;
  background: #fff3cd;
  color: #856404;
  padding: 10px 20px;
  font-size: 14px;
  border-bottom: 1px solid #ffc107;
}
.container { max-width: 960px; margin: 0 auto; padding: 28px 24px 120px; }

/* ── Breadcrumb ── */
.breadcrumb { font-size: 13px; color: var(--text-secondary); margin-bottom: 20px; }
.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* ── Progress Bar ── */
.progress-wrap {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 16px 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.progress-bar-outer {
  flex: 1; min-width: 200px; height: 10px;
  background: #e8e3db; border-radius: 5px; overflow: hidden;
}
.progress-bar-inner {
  height: 100%;
  background: linear-gradient(90deg, #27ae60, #2ecc71);
  border-radius: 5px; transition: width 0.4s ease;
}
.progress-text { font-size: 13px; color: var(--text-secondary); white-space: nowrap; }
.progress-percent { font-size: 18px; font-weight: 700; color: #27ae60; }
.reset-progress {
  font-size: 12px; color: #b5a89a; cursor: pointer;
  border: 1px solid #d5cfc6; padding: 4px 12px; border-radius: 12px;
  transition: all 0.2s;
}
.reset-progress:hover { color: var(--accent); border-color: var(--accent); }

/* ── Part Nav ── */
.part-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.part-nav a {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  text-decoration: none;
  color: var(--accent);
  font-size: 13px;
  transition: all 0.2s;
}
.part-nav a:hover, .part-nav a.active {
  background: #eaf2f8;
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Index Page ── */
.index-page .content { max-width: 960px; margin: 0 auto; padding: 28px 24px 60px; }
.mode-section { max-width: 960px; margin: 32px auto 0; padding: 0 24px; }
.mode-grid { display: grid; grid-template-columns: 1fr; gap: 20px; max-width: 600px; margin: 0 auto; }
@media (max-width: 640px) { .mode-grid { grid-template-columns: 1fr; } }
.mode-card {
  display: block;
  text-decoration: none;
  color: #fff;
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: transform 0.3s, box-shadow 0.3s;
  text-align: center;
}
.mode-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}
.mode-card.audio {
  background: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #3182ce 100%);
}
.mode-card .mode-icon { font-size: 44px; margin-bottom: 16px; display: block; }
.mode-card h2 {
  font-family: var(--font-heading);
  font-size: 24px;
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}
.mode-card .mode-desc {
  font-size: 14px;
  opacity: 0.85;
  line-height: 1.6;
}
.mode-card .mode-tag {
  display: inline-block;
  margin-top: 14px;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.25);
}
.mode-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 40px auto 12px;
  max-width: 960px;
  padding: 0 24px;
}
.mode-divider::before, .mode-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.mode-divider span {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ── Index Part Cards ── */
.index-part {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: box-shadow 0.25s, transform 0.25s;
}
.index-part:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.index-part h3 { font-family: var(--font-heading); font-size: 17px; margin-bottom: 4px; }
.index-part h3 a { color: var(--text); text-decoration: none; transition: color 0.2s; }
.index-part h3 a:hover { color: #2980b9; }
.index-part .part-meta { font-size: 13px; color: var(--text-secondary); }
.index-chapter {
  font-size: 13px;
  color: #555;
  padding: 5px 0 5px 18px;
  border-left: 2px solid transparent;
  margin: 4px 0;
  transition: all 0.2s;
}
.index-chapter:hover {
  border-left-color: #2980b9;
  color: var(--text);
  background: linear-gradient(90deg, #eaf2f8 0%, transparent 100%);
}

/* ── Segment Cards ── */
.segment-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 18px 24px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all 0.3s;
  cursor: pointer;
}
.segment-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.segment-card.playing {
  background: #eaf2f8;
  border-color: var(--accent);
  box-shadow: 0 2px 16px rgba(26,82,118,0.18);
}
.segment-card.done { opacity: 0.7; }
.segment-card.done::after {
  content: ' ✓';
  color: #27ae60;
  font-size: 14px;
}
.segment-card .seg-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.segment-card .seg-label {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  font-weight: 600;
}
.segment-card .seg-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.segment-card .seg-play {
  font-size: 20px;
  color: var(--accent);
  transition: transform 0.2s;
  min-width: 28px;
  text-align: center;
}
.segment-card.playing .seg-play {
  animation: pulse 1.2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.segment-card .seg-preview {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Chapter Headers ── */
.chapter-heading {
  background: linear-gradient(135deg, #eaf2f8 0%, #d4e6f1 100%);
  border-radius: var(--radius);
  padding: 16px 24px;
  margin: 24px 0 12px;
  border-left: 4px solid var(--accent);
}
.chapter-heading h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--accent);
  margin: 0;
}

/* ── Player Bar ── */
.player-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--card-bg);
  border-top: 2px solid var(--accent);
  padding: 12px 24px;
  display: none;
  align-items: center;
  gap: 16px;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.12);
  border-radius: 16px 16px 0 0;
  z-index: 200;
}
.player-bar.active { display: flex; flex-wrap: wrap; }
.player-bar audio {
  flex: 1;
  min-width: 200px;
  height: 40px;
}
.player-bar audio::-webkit-media-controls-panel {
  background: #f9f7f3;
  border-radius: 10px;
}

/* ── Cue Display ── */
.cue-display {
  width: 100%;
  min-width: 200px;
  padding: 8px 16px;
  background: #faf8f3;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
  display: none;
  max-height: 60px;
  overflow-y: auto;
}
.cue-display.active { display: block; }
.cue-display .cue-text {
  font-family: var(--font-heading);
  font-style: italic;
}

.player-info {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 250px;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 40px 24px;
  color: #b5b0a8;
  font-size: 13px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* ── Responsive ── */
@media (max-width: 700px) {
  .header { padding: 20px 16px; }
  .header h1 { font-size: 17px; }
  .container { padding: 16px 12px 140px; }
  .segment-card { padding: 14px 16px; }
  .segment-card .seg-title { font-size: 13px; }
  .player-bar { padding: 10px 16px; gap: 10px; }
  .player-bar audio { min-width: 140px; }
  .index-part { padding: 18px 16px; }
}