/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #fdf6e3;
  --bg-card: #ffffff;
  --text: #2c2c2c;
  --text-muted: #6b6b6b;
  --accent: #8b4513;
  --accent-hover: #a0522d;
  --border: #e0d5c1;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.14);
  --radius: 12px;
  --font-serif: "Georgia", "Times New Roman", serif;
  --font-sans: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  min-height: 100vh;
}

/* ===== Index Page ===== */
.site-header {
  text-align: center;
  padding: 60px 20px 40px;
}

.site-header h1 {
  font-family: 'Playfair Display', var(--font-serif);
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.site-header p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 30px 80px;
}

/* Open-book card design */
.book-card {
  display: flex;
  text-decoration: none;
  color: var(--text);
  min-height: 200px;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  /* Book shape: two "pages" side by side */
  background: linear-gradient(to right,
    #faf3e6 0%, #fff8ee 48%,
    #e8dcc8 48%, #e8dcc8 48.5%,
    #d4c5a9 48.5%, #d4c5a9 49%,
    #e8dcc8 49%, #e8dcc8 49.5%,
    #fff8ee 49.5%, #fff8ee 52%,
    #fff8ee 52%, #faf3e6 100%
  );
  border-radius: 4px 12px 12px 4px;
  box-shadow:
    0 2px 8px rgba(0,0,0,0.08),
    0 8px 24px rgba(0,0,0,0.06),
    inset 0 0 30px rgba(139,69,19,0.03);
  overflow: hidden;
}

/* Left page - decorative lines */
.book-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 48%;
  background-image:
    repeating-linear-gradient(
      transparent,
      transparent 28px,
      rgba(139,69,19,0.06) 28px,
      rgba(139,69,19,0.06) 29px
    );
  background-position: 0 20px;
  border-right: none;
  pointer-events: none;
}

/* Page edge effect on left side (book spine shadow) */
.book-card::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(to right,
    rgba(139,69,19,0.25) 0%,
    rgba(139,69,19,0.08) 60%,
    transparent 100%
  );
  border-radius: 4px 0 0 4px;
  pointer-events: none;
}

/* Left page - title area */
.book-card .book-page-left {
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 46%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  z-index: 1;
}

/* Right page - author & year area */
.book-card .book-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  padding: 28px 24px 28px 52%;
  position: relative;
  z-index: 1;
}

.book-card:hover {
  transform: translateY(-5px) scale(1.01);
  box-shadow:
    0 4px 12px rgba(0,0,0,0.1),
    0 16px 40px rgba(0,0,0,0.1),
    inset 0 0 30px rgba(139,69,19,0.04);
}

.book-card .book-title {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--accent);
  text-align: center;
}

.book-card .book-author {
  font-size: 1rem;
  color: var(--text);
  font-style: italic;
  margin-bottom: 4px;
}

.book-card .book-year {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ===== Reading Progress Bar ===== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: linear-gradient(to right, var(--accent), var(--accent-hover));
  z-index: 200;
  transition: width 0.1s linear;
}

/* ===== Tabbed Sidebar ===== */
.sidebar {
  position: fixed;
  top: 60px;
  left: 0;
  z-index: 90;
  display: flex;
  max-height: calc(100vh - 60px);
}

.sidebar-tabs {
  display: flex;
  flex-direction: column;
  background: rgba(253,246,227,0.97);
  border-right: 1px solid var(--border);
  z-index: 92;
  padding-top: 4px;
}

.sidebar-tab {
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  border-left: 3px solid transparent;
  filter: grayscale(1) contrast(1.4);
}

.sidebar-tab:hover {
  color: var(--accent);
  background: rgba(139,69,19,0.06);
  filter: none;
}

.sidebar-tab.active {
  color: var(--accent);
  background: rgba(139,69,19,0.08);
  border-left-color: var(--accent);
  filter: none;
}

.sidebar-tab .tab-label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.sidebar-panel {
  display: none;
  width: 260px;
  max-height: calc(100vh - 60px);
  overflow-y: auto;
  background: rgba(253,246,227,0.97);
  border-right: 1px solid var(--border);
  box-shadow: 2px 0 12px rgba(0,0,0,0.06);
  padding: 16px 0;
}

#panelBgcolor {
  padding: 16px 16px;
}

.sidebar-panel.active {
  display: block;
}

.sidebar-panel h3 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  padding: 0 20px 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 6px;
  text-align: center;
}

.sidebar-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-panel li a {
  display: block;
  padding: 7px 20px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: all 0.15s;
  line-height: 1.4;
}

.sidebar-panel li a:hover {
  color: var(--accent);
  background: rgba(139,69,19,0.04);
}

.sidebar-panel li a.active {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
  background: rgba(139,69,19,0.06);
}

/* Bookmark panel */
.bookmark-section {
  padding: 12px 20px;
}

.bookmark-btn {
  display: block;
  width: 100%;
  padding: 10px;
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text);
}

.bookmark-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.bookmark-info {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 8px 0;
  text-align: center;
}

/* Checklist panel */
.checklist-add-bar {
  padding: 10px 20px;
  position: relative;
}

.checklist-add-btn {
  display: block;
  width: 100%;
  padding: 8px 10px;
  border: 1px dashed var(--accent);
  border-radius: 6px;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  transition: all 0.15s;
}

.checklist-add-btn:hover {
  background: rgba(139,69,19,0.06);
  border-style: solid;
}

.checklist-dropdown {
  position: absolute;
  left: 10px;
  right: 10px;
  top: 100%;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  z-index: 100;
  max-height: 260px;
  display: flex;
  flex-direction: column;
}

.checklist-search {
  width: 100%;
  padding: 8px 10px;
  border: none;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  outline: none;
  border-radius: 6px 6px 0 0;
}

.checklist-options {
  overflow-y: auto;
  max-height: 210px;
}

.checklist-option {
  padding: 7px 10px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--text);
  cursor: pointer;
  transition: background 0.1s;
}

.checklist-option:hover {
  background: rgba(139,69,19,0.06);
  color: var(--accent);
}

.checklist-no-result {
  color: var(--text-muted);
  font-style: italic;
  cursor: default;
}

.checklist-no-result:hover {
  background: transparent;
  color: var(--text-muted);
}

.checklist-empty {
  padding: 16px 20px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 20px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text);
  transition: background 0.15s;
}

.checklist-item:hover {
  background: rgba(139,69,19,0.04);
}

.checklist-item input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  cursor: pointer;
}

.checklist-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.checklist-item.checked .checklist-title {
  color: var(--text-muted);
  text-decoration: line-through;
}

.checklist-remove {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 1rem;
  cursor: pointer;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.15s;
}

.checklist-item:hover .checklist-remove {
  opacity: 1;
}

.checklist-remove:hover {
  background: rgba(139,69,19,0.1);
  color: var(--accent);
}

/* Text settings panel */
.text-setting {
  padding: 10px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.text-setting label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.text-setting select,
.text-setting input[type="range"] {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #fff;
  cursor: pointer;
}

.text-setting .size-label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
}

/* ===== Background Color Swatches ===== */
.bg-options {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  flex-wrap: wrap;
}
.bg-swatch {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.bg-swatch:hover {
  transform: scale(1.15);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.bg-swatch.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139,69,19,0.3);
}

/* Background theme overrides */
.bg-sepia { background: #f4ecd8 !important; }
.bg-sage { background: #e2ece2 !important; }
.bg-dusk { background: #d8dce8 !important; }
.bg-night {
  background: #2b2b2b !important;
  color: #d4d4d4 !important;
}

/* --- Sage theme --- */
.bg-sage .reader-nav {
  background: rgba(214,230,214,0.95) !important;
  border-color: #b8ccb8 !important;
}
.bg-sage .reader-nav a,
.bg-sage .reader-nav .nav-title { color: #3a6b3a !important; }
.bg-sage .sidebar-tabs { background: rgba(214,230,214,0.97) !important; border-color: #b8ccb8 !important; }
.bg-sage .sidebar-panel { background: rgba(214,230,214,0.97) !important; border-color: #b8ccb8 !important; }
.bg-sage .sidebar-tab:hover,
.bg-sage .sidebar-tab.active { color: #3a6b3a !important; }
.bg-sage .sidebar-tab.active { border-left-color: #3a6b3a !important; background: rgba(58,107,58,0.08) !important; }
.bg-sage .site-header h1 { color: #3a6b3a !important; }
.bg-sage .novel-header h1 { color: #3a6b3a !important; }
.bg-sage .novel-body h2 { color: #3a6b3a !important; }
.bg-sage .novel-body .opening::first-letter { color: #3a6b3a !important; }
.bg-sage .book-item { background: rgba(255,255,255,0.5) !important; border-color: #b8ccb8 !important; }
.bg-sage .filter-bar input[type="text"] { background: rgba(255,255,255,0.6) !important; border-color: #b8ccb8 !important; }
.bg-sage .filter-btn[data-cat] { background: rgba(255,255,255,0.4) !important; }
.bg-sage .filter-btn[data-cat].active { background: #3a6b3a !important; }
.bg-sage .progress-bar { background: #3a6b3a !important; }
.bg-sage .novel-note .nav-title { color: #3a6b3a !important; }
.bg-sage .scroll-top { background: #3a6b3a !important; }
.bg-sage .sidebar-panel h3 { color: #3a6b3a !important; }

/* --- Dusk theme --- */
.bg-dusk .reader-nav {
  background: rgba(208,214,228,0.95) !important;
  border-color: #b0b8d0 !important;
}
.bg-dusk .reader-nav a,
.bg-dusk .reader-nav .nav-title { color: #4a4a7a !important; }
.bg-dusk .sidebar-tabs { background: rgba(208,214,228,0.97) !important; border-color: #b0b8d0 !important; }
.bg-dusk .sidebar-panel { background: rgba(208,214,228,0.97) !important; border-color: #b0b8d0 !important; }
.bg-dusk .sidebar-tab:hover,
.bg-dusk .sidebar-tab.active { color: #4a4a7a !important; }
.bg-dusk .sidebar-tab.active { border-left-color: #4a4a7a !important; background: rgba(74,74,122,0.08) !important; }
.bg-dusk .site-header h1 { color: #4a4a7a !important; }
.bg-dusk .novel-header h1 { color: #4a4a7a !important; }
.bg-dusk .novel-body h2 { color: #4a4a7a !important; }
.bg-dusk .novel-body .opening::first-letter { color: #4a4a7a !important; }
.bg-dusk .book-item { background: rgba(255,255,255,0.5) !important; border-color: #b0b8d0 !important; }
.bg-dusk .filter-bar input[type="text"] { background: rgba(255,255,255,0.6) !important; border-color: #b0b8d0 !important; }
.bg-dusk .filter-btn[data-cat] { background: rgba(255,255,255,0.4) !important; }
.bg-dusk .filter-btn[data-cat].active { background: #4a4a7a !important; }
.bg-dusk .progress-bar { background: #4a4a7a !important; }
.bg-dusk .novel-note .nav-title { color: #4a4a7a !important; }
.bg-dusk .scroll-top { background: #4a4a7a !important; }
.bg-dusk .sidebar-panel h3 { color: #4a4a7a !important; }

/* --- Night theme --- */
.bg-night .novel-body h2 { color: #e0c8a0 !important; }
.bg-night .novel-body .opening::first-letter { color: #e0c8a0 !important; }
.bg-night .reader-nav {
  background: rgba(43,43,43,0.95) !important;
  border-color: #444 !important;
}
.bg-night .reader-nav a,
.bg-night .reader-nav .nav-title { color: #d4a574 !important; }
.bg-night .sidebar-tabs { background: rgba(51,51,51,0.97) !important; border-color: #444 !important; }
.bg-night .sidebar {
  background: #333 !important;
  border-color: #444 !important;
}
.bg-night .sidebar-tab { color: #ccc !important; }
.bg-night .sidebar-tab.active { color: #d4a574 !important; border-color: #d4a574 !important; }
.bg-night .sidebar-panel { background: rgba(51,51,51,0.97) !important; color: #d4d4d4 !important; border-color: #444 !important; }
.bg-night .sidebar-panel h3 { color: #e0c8a0 !important; }
.bg-night .sidebar-panel a { color: #d4a574 !important; }
.bg-night .site-header h1 { color: #e0c8a0 !important; }
.bg-night .novel-header { color: #d4d4d4 !important; }
.bg-night .novel-header h1 { color: #e0c8a0 !important; }
.bg-night .progress-bar { background: #d4a574 !important; }
.bg-night .novel-note .nav-title { color: #d4a574 !important; }
.bg-night .scroll-top { background: #d4a574 !important; }
.bg-night .book-item { background: #3a3a3a !important; border-color: #555 !important; color: #d4d4d4 !important; }
.bg-night .book-item .item-author { color: #999 !important; }
.bg-night .book-item .item-cat { background: rgba(255,255,255,0.1) !important; color: #aaa !important; }
.bg-night .book-item .item-year { color: #999 !important; }
.bg-night .book-item.unavailable { color: #666 !important; }
.bg-night .book-item.unavailable .item-title,
.bg-night .book-item.unavailable .item-author { color: #555 !important; }
.bg-night .filter-bar input[type="text"] { background: #3a3a3a !important; border-color: #555 !important; color: #d4d4d4 !important; }
.bg-night .filter-btn[data-cat] { background: #3a3a3a !important; }
.bg-night .filter-btn[data-cat].active { color: #fff !important; }
.bg-night .level-header { border-color: #444 !important; }
.bg-night .level-info { color: #999 !important; }
.bg-night .level-count { color: #999 !important; }
.bg-night .no-results { color: #999 !important; }

/* Settings panel */
.settings-check {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text);
  cursor: pointer;
}
.settings-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ===== Novel Reader Page ===== */
.reader-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253, 246, 227, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.reader-nav a {
  font-family: var(--font-sans);
  text-decoration: none;
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.15s;
}

.reader-nav a:hover {
  color: var(--accent-hover);
}

.reader-nav .nav-title {
  font-family: 'Playfair Display', var(--font-serif);
  font-size: 1.3rem;
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  flex: 1;
  padding: 0 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 1.5px;
  transition: color 0.15s;
}

.reader-nav .nav-title:hover {
  color: var(--accent-hover);
}

.novel-header {
  text-align: center;
  padding: 60px 20px 40px;
  max-width: 700px;
  margin: 0 auto;
}

.novel-header h1 {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
  line-height: 1.2;
}

.novel-header .author {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 6px;
}

.novel-header .year {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.novel-header hr {
  margin-top: 36px;
  border: none;
  border-top: 2px solid var(--border);
  width: 80px;
  margin-left: auto;
  margin-right: auto;
}

.novel-body {
  max-width: 680px;
  margin: 0 auto;
  padding: 20px 24px 100px;
  font-size: 1.12rem;
}

.novel-body h2 {
  font-size: 1.6rem;
  margin: 50px 0 20px;
  color: var(--accent);
  text-align: center;
  scroll-margin-top: 70px;
}

.novel-body h3 {
  font-size: 1.25rem;
  margin: 36px 0 16px;
  text-align: center;
  color: var(--text-muted);
}

.novel-body p {
  margin-bottom: 1.2em;
  text-align: justify;
  hyphens: auto;
}

.novel-body .opening {
  font-size: 1.07em;
}

.novel-body .opening::first-letter {
  font-size: 3em;
  float: left;
  line-height: 1;
  padding-right: 8px;
  color: var(--accent);
  font-weight: 700;
}

.novel-note {
  text-align: center;
  padding: 40px 20px;
  margin: 0 auto 60px;
}

.novel-note .nav-title {
  font-family: 'Playfair Display', var(--font-serif);
  font-size: 1.3rem;
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 1.5px;
  transition: color 0.15s;
}

.novel-note .nav-title:hover {
  color: var(--accent-hover);
}

/* ===== Scroll-to-top button ===== */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1.3rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
  display: none;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s;
}

.scroll-top.visible {
  display: flex;
}

/* ===== Footer ===== */
.site-footer {
  text-align: center;
  padding: 30px 20px 40px;
  font-family: var(--font-sans);
  font-size: 1.1rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* ===== TTS Audio Player ===== */
.tts-player {
  padding: 12px 16px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(139,69,19,0.03);
}

.tts-player h3 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  padding: 0;
  border-bottom: none;
  margin-bottom: 8px;
}

.tts-chapter-info {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tts-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-bottom: 10px;
}

.tts-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  color: var(--text);
  padding: 0;
  line-height: 1;
}

.tts-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tts-btn-play {
  width: 40px;
  height: 40px;
  font-size: 1rem;
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.tts-btn-play:hover {
  background: var(--accent-hover);
  color: #fff;
  border-color: var(--accent-hover);
}

.tts-setting {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.tts-setting label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  min-width: 38px;
}

.tts-setting select {
  flex: 1;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  min-width: 0;
}

.tts-speed-label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 28px;
  text-align: right;
}

.tts-slider {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.tts-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.tts-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

/* TTS highlight for currently reading paragraph */
.tts-highlight {
  background: rgba(139,69,19,0.08) !important;
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  transition: background 0.3s;
}

/* ===== Scrollbar for sidebar ===== */
.sidebar-panel::-webkit-scrollbar {
  width: 4px;
}
.sidebar-panel::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .sidebar-panel { width: 220px; }
}

@media (max-width: 600px) {
  .site-header h1 { font-size: 2rem; }
  .book-grid { padding: 16px; gap: 16px; grid-template-columns: 1fr; }
  .book-card { min-height: 150px; }
  .book-card .book-title { font-size: 1.05rem; }
  .book-card .book-page-left { padding: 16px 10px; }
  .book-card .book-content { padding: 20px 16px 20px 52%; }
  .novel-header h1 { font-size: 1.8rem; }
  .novel-body { font-size: 1.05rem; padding: 16px 18px 80px; }
  .reader-nav .nav-title { display: none; }
  .sidebar-panel { width: 200px; }
  .sidebar-tab { width: 38px; height: 38px; font-size: 0.95rem; }
}