:root {
  --bg: #0f0f1a;
  --bg2: #1a1a2e;
  --bg3: #25253e;
  --text: #e8e6e3;
  --text2: #a09c97;
  --accent: #d4a853;
  --accent2: #b8912e;
  --border: #333355;
  --reader-bg: #161625;
  --shadow: rgba(0,0,0,0.3);
  --font-body: 'Noto Sans Thai', sans-serif;
  --font-title: 'Noto Serif Thai', serif;
}

[data-theme="light"] {
  --bg: #f5f0e8;
  --bg2: #fffdf7;
  --bg3: #ede8dc;
  --text: #2c2416;
  --text2: #6b5d4d;
  --accent: #b8912e;
  --accent2: #9a7820;
  --border: #d4cbb8;
  --reader-bg: #fffdf7;
  --shadow: rgba(0,0,0,0.08);
}

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.7;
  transition: background 0.3s, color 0.3s;
}

/* Header */
#header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.logo-icon { font-size: 28px; }

.logo h1 {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}

.subtitle {
  font-size: 11px;
  color: var(--text2);
}

.theme-toggle {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 18px;
  cursor: pointer;
  transition: transform 0.2s;
}

.theme-toggle:hover { transform: scale(1.1); }

/* Pages */
.page { display: none; }
.page.active { display: block; }

/* Hero */
.hero {
  text-align: center;
  padding: 60px 20px 40px;
  background: linear-gradient(180deg, var(--bg2) 0%, var(--bg) 100%);
}

.hero-content { max-width: 600px; margin: 0 auto; }

.hero-badge {
  display: inline-block;
  background: var(--accent);
  color: #1a1a2e;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero h2 {
  font-family: var(--font-title);
  font-size: 32px;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 15px;
  color: var(--text2);
  line-height: 1.8;
  margin-bottom: 20px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 24px;
}

.hero-tags span {
  background: var(--bg3);
  padding: 4px 12px;
  border-radius: 16px;
  font-size: 13px;
  border: 1px solid var(--border);
}

.btn-start {
  background: var(--accent);
  color: #1a1a2e;
  border: none;
  padding: 12px 32px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
  transition: transform 0.2s, background 0.2s;
}

.btn-start:hover { transform: translateY(-2px); background: var(--accent2); }

/* Arcs */
.arcs-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

.arc {
  background: var(--bg2);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.arc-header {
  padding: 16px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: background 0.2s;
}

.arc-header:hover { background: var(--bg3); }

.arc-header h3 {
  flex: 1;
  font-size: 15px;
  font-family: var(--font-title);
}

.arc-range {
  font-size: 12px;
  color: var(--text2);
  background: var(--bg3);
  padding: 2px 10px;
  border-radius: 10px;
}

.arc-toggle {
  font-size: 12px;
  color: var(--text2);
  transition: transform 0.3s;
}

.arc.open .arc-toggle { transform: rotate(180deg); }

.arc-chapters {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.arc.open .arc-chapters { max-height: 1000px; }

.chapter-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.2s;
}

.chapter-item:hover { background: var(--bg3); }

.ch-num {
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: #1a1a2e;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.ch-num.locked { background: var(--bg3); color: var(--text2); }

.ch-info { flex: 1; min-width: 0; }

.ch-title {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ch-status {
  font-size: 11px;
  color: var(--text2);
}

.ch-actions {
  display: flex;
  gap: 6px;
}

.ch-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-body);
  transition: background 0.2s;
}

.ch-btn:hover { background: var(--accent); color: #1a1a2e; }
.ch-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* Reader */
.reader-header {
  max-width: 800px;
  margin: 0 auto;
  padding: 16px 20px 0;
}

.btn-back {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
  margin-bottom: 8px;
}

.btn-back:hover { background: var(--bg3); }

.reader-title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

#reader-chapter-label {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
}

.reader-controls {
  display: flex;
  gap: 4px;
}

.reader-controls button {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
}

.reader-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.reader-nav button {
  flex: 1;
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
  transition: background 0.2s;
}

.reader-nav button:hover { background: var(--accent); color: #1a1a2e; }
.reader-nav button:disabled { opacity: 0.3; cursor: not-allowed; }

.reader-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px 120px;
  font-size: 18px;
  line-height: 2;
  color: var(--text);
}

.reader-content p {
  margin-bottom: 1em;
  text-indent: 2em;
}

.loading {
  text-align: center;
  padding: 60px;
  color: var(--text2);
}

/* Audio Player */
.audio-player {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg2);
  border-top: 2px solid var(--accent);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 200;
  flex-wrap: wrap;
}

.audio-player.hidden { display: none; }

.player-info {
  flex: 1;
  min-width: 150px;
}

#player-title {
  font-size: 13px;
  font-weight: 500;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.player-controls {
  display: flex;
  gap: 8px;
}

.player-controls button, .player-speed button {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-controls button:hover { background: var(--accent); color: #1a1a2e; }

.player-progress {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 2;
  min-width: 200px;
}

.player-progress span {
  font-size: 11px;
  color: var(--text2);
  min-width: 35px;
}

#player-seek {
  flex: 1;
  accent-color: var(--accent);
  height: 4px;
}

.player-speed {
  display: flex;
  align-items: center;
  gap: 4px;
}

.player-speed button { width: auto; border-radius: 4px; padding: 2px 8px; font-size: 11px; }
#player-speed-label { font-size: 12px; min-width: 30px; text-align: center; }

.player-close {
  background: none;
  border: none;
  color: var(--text2);
  cursor: pointer;
  font-size: 16px;
  padding: 4px;
}

/* Responsive */
@media (max-width: 600px) {
  .hero h2 { font-size: 24px; }
  .reader-content { font-size: 16px; padding: 0 16px 140px; }
  .audio-player { padding: 8px 12px; gap: 8px; }
  .player-progress { min-width: 150px; }
}