/* ── Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;700&family=Source+Han+Serif+SC&display=swap');

/* ── CSS Variables ─────────────────────────────────── */
:root {
  --bg: #0f1419;
  --bg2: #1a1f2e;
  --bg3: #232839;
  --text: #e1e4e8;
  --text2: #8b949e;
  --text3: #6e7681;
  --accent: #58a6ff;
  --accent2: #3b82f6;
  --border: #30363d;
  --sidebar-w: 280px;
  --toolbar-h: 50px;
  --ttsbar-h: 56px;
  --font-body: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
  --font-ui: -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-size: 18px;
  --line-height: 2;
}

[data-theme="light"] {
  --bg: #f8f9fa;
  --bg2: #ffffff;
  --bg3: #e9ecef;
  --text: #1a1a2e;
  --text2: #495057;
  --text3: #868e96;
  --accent: #1a73e8;
  --accent2: #1557b0;
  --border: #dee2e6;
}

/* ── Reset ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s;
}

/* ── App Layout ────────────────────────────────────── */
#app {
  display: flex;
  height: 100vh;
}

/* ── Sidebar ───────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  transition: margin-left 0.3s;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}
.site-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}

.sidebar-section {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}
.section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 8px 8px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Novel items */
.novel-item {
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 4px;
}
.novel-item:hover { background: var(--bg3); }
.novel-item.active { background: var(--accent); color: #fff; }
.novel-item .novel-title {
  font-weight: 600;
  font-size: 15px;
}
.novel-item .novel-meta {
  font-size: 12px;
  color: var(--text3);
  margin-top: 2px;
}

/* Chapter items */
.chapter-item {
  padding: 8px 12px 8px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text2);
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chapter-item:hover { background: var(--bg3); color: var(--text); }
.chapter-item.active { color: var(--accent); font-weight: 600; }
.chapter-item.outline-item { color: var(--text3); font-style: italic; font-size: 13px; }

/* Sidebar footer */
.sidebar-footer {
  padding: 8px 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text3);
}

/* ── Main Content ──────────────────────────────────── */
#main-content {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.page {
  flex: 1;
  padding: 40px;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

/* Home page */
.home-header { text-align: center; padding: 60px 0 40px; }
.home-header h1 { font-size: 36px; color: var(--accent); margin-bottom: 8px; }
.home-subtitle { color: var(--text2); font-size: 16px; }

.novel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.novel-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s;
}
.novel-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}
.novel-card .card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}
.novel-card .card-author {
  font-size: 13px;
  color: var(--text2);
  margin-bottom: 8px;
}
.novel-card .card-desc {
  font-size: 13px;
  color: var(--text3);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.novel-card .card-chapters {
  font-size: 12px;
  color: var(--accent);
  margin-top: 12px;
}

/* ── Reader ────────────────────────────────────────── */
.reader-toolbar {
  display: flex;
  align-items: center;
  height: var(--toolbar-h);
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
  gap: 12px;
  flex-shrink: 0;
}

.reader-info { flex: 1; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.reader-novel-name { font-weight: 600; color: var(--accent); }
.reader-chapter-name { color: var(--text2); }
.sep { margin: 0 4px; color: var(--text3); }

.toolbar-right { display: flex; gap: 4px; }

.reader-content {
  flex: 1;
  overflow-y: auto;
  padding: 40px;
  font-family: var(--font-body);
  font-size: var(--font-size);
  line-height: var(--line-height);
  color: var(--text);
}

.reader-content p {
  text-indent: 2em;
  margin-bottom: 0;
  text-align: justify;
}
.reader-content h1, .reader-content h2, .reader-content h3 {
  font-family: var(--font-ui);
  margin: 1.5em 0 1em;
  color: var(--accent);
}
.reader-content h1 { font-size: 1.5em; text-align: center; }
.reader-content h2 { font-size: 1.3em; }
.reader-content h3 { font-size: 1.1em; }
.reader-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5em 0;
}
.reader-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 8px 16px;
  margin: 1em 0;
  color: var(--text2);
  background: var(--bg3);
  border-radius: 0 6px 6px 0;
}
.reader-content code {
  background: var(--bg3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.reader-content .tts-highlight {
  background: rgba(88, 166, 255, 0.15);
  border-radius: 4px;
  padding: 2px 4px;
  margin: -2px -4px;
  transition: background 0.3s;
}
[data-theme="light"] .reader-content .tts-highlight {
  background: rgba(26, 115, 232, 0.12);
}

.reader-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
#chapter-progress { color: var(--text3); font-size: 13px; }

/* ── Buttons ───────────────────────────────────────── */
.icon-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text2);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 15px;
  transition: background 0.2s, color 0.2s;
}
.icon-btn:hover { background: var(--bg3); color: var(--text); }
.icon-btn:active { transform: scale(0.95); }
.text-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 13px;
}
.text-btn:hover { text-decoration: underline; }
.nav-btn {
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}
.nav-btn:hover { background: var(--bg3); }
.nav-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── TTS Bar ───────────────────────────────────────── */
.tts-bar {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-w);
  right: 0;
  height: var(--ttsbar-h);
  background: var(--bg2);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  z-index: 100;
}
.tts-bar-left { display: flex; align-items: center; gap: 12px; flex: 1; }
.tts-bar-center { display: flex; align-items: center; gap: 8px; }
.tts-bar-right { display: flex; align-items: center; gap: 8px; }
.tts-btn-main {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.tts-btn-main:hover { background: var(--accent2); }
.tts-btn-small {
  background: none;
  border: 1px solid var(--border);
  color: var(--text2);
  width: 32px; height: 32px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}
.tts-btn-small:hover { background: var(--bg3); color: var(--text); }
.tts-select {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 13px;
}
#tts-time { font-size: 13px; color: var(--text2); font-family: monospace; min-width: 120px; }
#tts-status-text { font-size: 13px; color: var(--text2); min-width: 120px; }

.tts-progress-wrap {
  flex: 1;
  min-width: 120px;
  max-width: 300px;
  display: flex;
  align-items: center;
}
.tts-progress {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.tts-progress::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg2);
  cursor: pointer;
  transition: transform 0.15s;
}
.tts-progress::-webkit-slider-thumb:hover { transform: scale(1.2); }
.tts-progress::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg2);
  cursor: pointer;
}
.tts-progress::-moz-range-track {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
}

/* ── Responsive ────────────────────────────────────── */
@media (max-width: 768px) {
  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 50;
    box-shadow: 2px 0 20px rgba(0,0,0,0.3);
    margin-left: -280px;
  }
  #sidebar.open { margin-left: 0; }
  .page { padding: 20px; }
  .reader-content { padding: 20px; }
  :root { --font-size: 16px; }
  .tts-bar { left: 0; }
}