/* ============================================
   GLOBAL
   ============================================ */
:root {
  --primary: #1e3a5f;
  --primary-light: #2d5a8e;
  --primary-dark: #0f2640;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.35);
  --surface: rgba(255, 255, 255, 0.08);
  --glass: rgba(255, 255, 255, 0.78);
  --glass-border: rgba(255, 255, 255, 0.22);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 38, 64, 0.18);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s ease;
}

* {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Smooth scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.25); }

/* ============================================
   LANDING PAGE
   ============================================ */
.landing-page {
  min-height: 100vh;
  background: linear-gradient(145deg, #0a1628, #132e4f, #1a3a5c, #0f2640);
  background-size: 300% 300%;
  animation: gradientShift 12s ease infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow: hidden;
  position: relative;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.landing-container {
  max-width: 560px;
  width: 100%;
  position: relative;
  z-index: 2;
}

/* Floating particles */
.bg-particles {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.08);
  animation: float 25s infinite ease-in-out;
  filter: blur(1px);
}

.particle:nth-child(1) { width: 350px; height: 350px; top: -12%; left: -8%; animation-delay: 0s; background: rgba(30, 58, 95, 0.2); }
.particle:nth-child(2) { width: 220px; height: 220px; top: 55%; right: -6%; animation-delay: -6s; background: rgba(59, 130, 246, 0.1); }
.particle:nth-child(3) { width: 180px; height: 180px; bottom: 8%; left: 15%; animation-delay: -12s; background: rgba(96, 165, 250, 0.07); }
.particle:nth-child(4) { width: 120px; height: 120px; top: 25%; right: 12%; animation-delay: -8s; background: rgba(30, 58, 95, 0.12); }
.particle:nth-child(5) { width: 280px; height: 280px; bottom: -12%; right: 25%; animation-delay: -15s; background: rgba(59, 130, 246, 0.06); }

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(25px, -40px) scale(1.03); }
  66% { transform: translate(-15px, 25px) scale(0.97); }
}

/* Logo */
.logo-icon {
  font-size: 3.5rem;
  color: var(--accent-light);
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 0 24px var(--accent-glow));
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { filter: drop-shadow(0 0 24px var(--accent-glow)); }
  50% { filter: drop-shadow(0 0 36px rgba(59, 130, 246, 0.5)); }
}

.landing-title {
  font-size: 2.4rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.75px;
  margin-bottom: 0.25rem;
}

.landing-subtitle {
  color: rgba(255, 255, 255, 0.45);
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.2px;
}

/* Glass Card */
.glass-card {
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.4);
  transition: var(--transition);
}

.glass-card:hover {
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(59, 130, 246, 0.08), inset 0 1px 0 rgba(255,255,255,0.5);
}

/* Drop Zone */
.drop-zone {
  border: 2px dashed rgba(30, 58, 95, 0.2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  padding: 3rem 2rem;
  position: relative;
  overflow: hidden;
}

.drop-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.02), rgba(30, 58, 95, 0.02));
  transition: var(--transition);
  border-radius: inherit;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  border-style: solid;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.1);
}

.drop-zone:hover::before,
.drop-zone.drag-over::before {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.06), rgba(30, 58, 95, 0.04));
}

.drop-zone-content {
  position: relative;
  z-index: 1;
}

.upload-icon-wrapper {
  font-size: 2.8rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  transition: var(--transition);
}

.drop-zone:hover .upload-icon-wrapper {
  transform: translateY(-6px);
  color: var(--primary-light);
}

.drop-zone h4 {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 0.3rem;
}

.drop-zone p {
  color: #7c8ba0;
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.drop-zone-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(59, 130, 246, 0.06);
  color: var(--primary-light);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.2px;
}

/* Progress */
.custom-progress {
  height: 4px;
  border-radius: 2px;
  overflow: hidden;
  background: rgba(59, 130, 246, 0.08);
}

.custom-progress .progress-bar {
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  font-size: 0;
}

/* Recent Books */
.recent-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.recent-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 0.85rem;
  border-radius: 8px;
  transition: var(--transition);
  margin-bottom: 2px;
}

.recent-list li:hover {
  background: rgba(59, 130, 246, 0.05);
}

.recent-list li a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  transition: var(--transition-fast);
}

.recent-list li a:hover {
  color: var(--accent);
}

.recent-list li a::before {
  content: '\F27C';
  font-family: 'bootstrap-icons';
  margin-right: 0.6rem;
  color: var(--accent);
  font-size: 1rem;
  opacity: 0.6;
}

.recent-list li small {
  color: #9ca3af;
  font-size: 0.78rem;
}

/* Ghost button */
.btn-ghost {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.5);
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 400;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.2px;
}

.btn-ghost:hover {
  border-color: rgba(59, 130, 246, 0.3);
  color: rgba(255, 255, 255, 0.85);
  background: rgba(59, 130, 246, 0.08);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.08);
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeInUp 0.65s forwards;
}

.fade-in-delay-1 { animation-delay: 0.12s; }
.fade-in-delay-2 { animation-delay: 0.24s; }

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   READER PAGE
   ============================================ */
.reader-page {
  background: #f5f7fa;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Reader Navbar */
.reader-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  height: 52px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  box-shadow: 0 2px 16px rgba(15, 38, 64, 0.25);
  z-index: 100;
  flex-shrink: 0;
}

.nav-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
  cursor: pointer;
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.15);
}

.book-title-wrapper {
  overflow: hidden;
}

.book-title-label {
  font-weight: 500;
  font-size: 0.92rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 50vw;
  display: block;
  letter-spacing: -0.2px;
  opacity: 0.92;
}

/* Reader Body */
.reader-body {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* TOC Sidebar */
#toc-sidebar {
  width: 270px;
  min-width: 270px;
  background: #fff;
  border-right: 1px solid #edf0f4;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 1px 0 8px rgba(0, 0, 0, 0.03);
}

.toc-header {
  padding: 0.9rem 1.2rem;
  font-weight: 600;
  font-size: 0.75rem;
  color: #8895a7;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  border-bottom: 1px solid #f0f2f5;
}

.toc-scroll {
  overflow-y: auto;
  height: calc(100% - 44px);
  padding: 0.25rem 0;
}

#toc-sidebar .list-group-item,
#toc-mobile .list-group-item {
  cursor: pointer;
  border: none;
  padding: 0.55rem 1.2rem;
  font-size: 0.86rem;
  color: #4a5568;
  transition: var(--transition-fast);
  border-radius: 0;
  border-left: 2px solid transparent;
  line-height: 1.4;
}

#toc-sidebar .list-group-item:hover,
#toc-mobile .list-group-item:hover {
  background-color: #f0f4ff;
  color: var(--primary);
  border-left-color: var(--accent);
}

#toc-sidebar .list-group-item.active {
  background-color: #e8eeff;
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--accent);
}

/* Viewer */
.viewer-wrapper {
  flex: 1;
  overflow: hidden;
  min-width: 0;
  background: #fff;
}

#viewer {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* Bottom Nav Bar */
.reader-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  height: 46px;
  background: #fff;
  border-top: 1px solid #edf0f4;
  flex-shrink: 0;
  box-shadow: 0 -1px 6px rgba(0, 0, 0, 0.02);
}

.nav-page-btn {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid #e2e6ec;
  border-radius: 7px;
  background: #fff;
  color: #4a5568;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}

.nav-page-btn:hover {
  background: #f0f4ff;
  border-color: var(--accent-light);
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.08);
}

.nav-location {
  font-size: 0.78rem;
  color: #94a3b8;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.2px;
}

/* ============================================
   LOADING OVERLAY
   ============================================ */
#loading-overlay {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #f5f7fa, #eef1f6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-text {
  color: #94a3b8;
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.3px;
}

.book-animation {
  width: 50px;
  height: 60px;
  position: relative;
  perspective: 600px;
}

.book-animation .book-page {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  animation: bookFlip 1.8s infinite ease-in-out;
}

.book-animation .book-page:nth-child(1) { animation-delay: 0s; opacity: 0.2; }
.book-animation .book-page:nth-child(2) { animation-delay: 0.2s; opacity: 0.4; }
.book-animation .book-page:nth-child(3) { animation-delay: 0.4s; opacity: 0.7; }

@keyframes bookFlip {
  0%, 100% { transform: rotateY(0deg); }
  50% { transform: rotateY(25deg); }
}

/* ============================================
   SETTINGS PANEL
   ============================================ */
.reader-offcanvas {
  border: none !important;
  box-shadow: var(--shadow-lg);
}

.reader-offcanvas .offcanvas-header {
  border-bottom: 1px solid #f0f2f5;
  padding: 1.1rem 1.4rem;
}

.reader-offcanvas .offcanvas-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary);
}

.settings-group {
  margin-bottom: 1.6rem;
}

.settings-label {
  font-weight: 600;
  font-size: 0.72rem;
  color: #8895a7;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 0.7rem;
}

/* Font Size Control */
.font-size-control {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: #f7f9fb;
  border: 1px solid #edf0f4;
  border-radius: 8px;
  padding: 0.3rem;
}

.font-btn {
  width: 42px;
  height: 36px;
  border: 1px solid #e2e6ec;
  border-radius: 6px;
  background: #fff;
  color: #4a5568;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.font-btn:hover {
  background: #f0f4ff;
  border-color: var(--accent-light);
  color: var(--primary);
}

.font-btn .small { font-size: 0.7em; }
.font-btn .large { font-size: 1.2em; }

.font-size-value {
  flex: 1;
  text-align: center;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

/* Theme Switcher */
.theme-switcher {
  display: flex;
  gap: 0.6rem;
}

.theme-option {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem;
  border: 2px solid #e8ebf0;
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 0.72rem;
  font-weight: 500;
  color: #8895a7;
  letter-spacing: 0.2px;
}

.theme-option:hover {
  border-color: #c2cfe0;
}

.theme-option.active {
  border-color: var(--accent);
  background: #f0f4ff;
  color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.08);
}

.theme-preview {
  width: 100%;
  height: 24px;
  border-radius: 5px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.theme-preview-light { background: linear-gradient(135deg, #fff, #f8f9fa); }
.theme-preview-sepia { background: linear-gradient(135deg, #f4ecd8, #ece2c6); }
.theme-preview-dark { background: linear-gradient(135deg, #1a1a2e, #0f0f23); }

/* Flow mode buttons */
.settings-group .btn-outline-secondary {
  font-size: 0.82rem;
  font-weight: 500;
  border-color: #e2e6ec;
  color: #4a5568;
  transition: var(--transition-fast);
}

.settings-group .btn-outline-secondary:hover {
  background: #f0f4ff;
  border-color: var(--accent-light);
  color: var(--primary);
}

.settings-group .btn-outline-secondary.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* Info Card */
.info-card {
  background: #f7f9fb;
  border: 1px solid #edf0f4;
  border-radius: 8px;
  padding: 0.9rem 1rem;
  font-size: 0.83rem;
  color: #4a5568;
  line-height: 1.8;
}

/* ============================================
   ANALYSIS PANEL
   ============================================ */
.analysis-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
  cursor: pointer;
}

.analysis-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.analysis-btn.analyzing {
  animation: analyzePulse 1.5s infinite;
}

@keyframes analyzePulse {
  0%, 100% { box-shadow: none; }
  50% { box-shadow: 0 0 12px rgba(59, 130, 246, 0.4); }
}

.analysis-offcanvas {
  width: 420px !important;
  border: none !important;
  box-shadow: var(--shadow-lg);
}

.analysis-offcanvas .offcanvas-header {
  border-bottom: 1px solid #f0f2f5;
  padding: 1.1rem 1.4rem;
}

.analysis-offcanvas .offcanvas-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary);
}

.analysis-offcanvas .offcanvas-body {
  padding: 1.2rem 1.4rem;
}

.analysis-placeholder {
  text-align: center;
  padding: 2rem 1rem;
  color: #94a3b8;
}

.analysis-placeholder i {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 0.75rem;
  opacity: 0.4;
}

.analysis-section {
  margin-bottom: 1.5rem;
}

.analysis-section-title {
  font-weight: 600;
  font-size: 0.72rem;
  color: #8895a7;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.score-card {
  background: #f7f9fb;
  border: 1px solid #edf0f4;
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin-bottom: 0.5rem;
}

.score-card .score-label {
  font-size: 0.78rem;
  color: #8895a7;
  font-weight: 500;
}

.score-card .score-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.score-card .score-desc {
  font-size: 0.75rem;
  color: #94a3b8;
  margin-top: 0.15rem;
}

.score-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.score-grid .score-card {
  margin-bottom: 0;
}

/* Chapter bar chart */
.chapter-bars {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 80px;
  padding: 0.5rem 0;
}

.chapter-bar {
  flex: 1;
  min-width: 4px;
  background: linear-gradient(to top, var(--accent), var(--accent-light));
  border-radius: 2px 2px 0 0;
  transition: var(--transition-fast);
  position: relative;
  cursor: pointer;
}

.chapter-bar:hover {
  opacity: 0.75;
}

.chapter-bar-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  font-size: 0.68rem;
  white-space: nowrap;
  z-index: 10;
}

.chapter-bar:hover .chapter-bar-tooltip {
  display: block;
}

/* Word frequency list */
.word-freq-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.word-freq-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0.6rem;
  border-radius: 5px;
  font-size: 0.82rem;
  transition: var(--transition-fast);
}

.word-freq-item:nth-child(odd) {
  background: #f7f9fb;
}

.word-freq-item .word {
  font-weight: 600;
  color: var(--primary);
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.8rem;
}

.word-freq-item .count {
  color: #94a3b8;
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
}

.word-freq-bar {
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 0.2rem;
  opacity: 0.3;
  transition: var(--transition-fast);
}

/* Long sentences */
.long-sentence-item {
  background: #fffbeb;
  border: 1px solid #fef3c7;
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  color: #4a5568;
  line-height: 1.5;
  cursor: pointer;
  transition: var(--transition-fast);
}

.long-sentence-item:hover {
  background: #fef9e7;
  border-color: #fde68a;
}

.long-sentence-item .sentence-meta {
  font-size: 0.7rem;
  color: #d97706;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

/* Analysis loading */
.analysis-loading {
  text-align: center;
  padding: 3rem 1rem;
}

.analysis-loading .spinner-border {
  color: var(--accent);
  width: 2rem;
  height: 2rem;
}

.analysis-loading p {
  color: #94a3b8;
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

/* Run Analysis Button */
.btn-analyze {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-analyze:hover {
  box-shadow: 0 4px 16px rgba(30, 58, 95, 0.25);
  transform: translateY(-1px);
}

.btn-analyze:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   READER THEMES
   ============================================ */

/* Sepia */
body.theme-sepia.reader-page {
  background-color: #f4ecd8;
}

body.theme-sepia .reader-navbar {
  background: linear-gradient(135deg, #3d2e22, #5b4636);
}

body.theme-sepia .reader-nav-bar {
  background: #efe6d0;
  border-color: #d9cdb5;
}

body.theme-sepia .nav-page-btn {
  background: #efe6d0;
  border-color: #d9cdb5;
  color: #5b4636;
}

body.theme-sepia .nav-page-btn:hover {
  background: #e5dac0;
}

body.theme-sepia #toc-sidebar {
  background: #efe6d0;
  border-color: #d9cdb5;
  box-shadow: 1px 0 8px rgba(91, 70, 54, 0.05);
}

body.theme-sepia .toc-header {
  color: #8b7355;
  border-color: #d9cdb5;
}

body.theme-sepia #toc-sidebar .list-group-item {
  color: #5b4636;
}

body.theme-sepia #toc-sidebar .list-group-item:hover {
  background-color: #e5dac0;
  color: #3d2e22;
}

body.theme-sepia .nav-location {
  color: #8b7355;
}

body.theme-sepia .viewer-wrapper {
  background: #f4ecd8;
}

/* Dark */
body.theme-dark.reader-page {
  background-color: #0c1222;
}

body.theme-dark .reader-navbar {
  background: linear-gradient(135deg, #060b16, #0c1222);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.4);
}

body.theme-dark .reader-nav-bar {
  background: #111827;
  border-color: #1e293b;
}

body.theme-dark .nav-page-btn {
  background: #1e293b;
  border-color: #334155;
  color: #94a3b8;
}

body.theme-dark .nav-page-btn:hover {
  background: #334155;
  color: #cbd5e1;
}

body.theme-dark #toc-sidebar {
  background: #111827;
  border-color: #1e293b;
  box-shadow: 1px 0 8px rgba(0, 0, 0, 0.2);
}

body.theme-dark .toc-header {
  color: #64748b;
  border-color: #1e293b;
}

body.theme-dark #toc-sidebar .list-group-item {
  color: #94a3b8;
  background: transparent;
}

body.theme-dark #toc-sidebar .list-group-item:hover {
  background-color: #1e293b;
  color: #cbd5e1;
  border-left-color: var(--accent);
}

body.theme-dark .nav-location {
  color: #64748b;
}

body.theme-dark #loading-overlay {
  background: linear-gradient(135deg, #0c1222, #111827);
}

body.theme-dark .loading-text {
  color: #64748b;
}

body.theme-dark .viewer-wrapper {
  background: #0c1222;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .landing-page {
    padding: 1rem;
  }

  .glass-card {
    padding: 1.5rem;
  }

  .drop-zone {
    padding: 2rem 1.5rem;
  }

  .landing-title {
    font-size: 1.75rem;
  }

  .book-title-label {
    max-width: 40vw;
  }

  .analysis-offcanvas {
    width: 100% !important;
  }
}

@media (max-width: 480px) {
  .drop-zone {
    padding: 1.5rem 1rem;
  }

  .upload-icon-wrapper {
    font-size: 2.2rem;
  }

  .theme-switcher {
    gap: 0.4rem;
  }
}