/* ══════════════════════════════════════════════════════
   BacaBuku — EPUB Reader with Indonesian TTS
   Style: Refined Literary / Editorial
   ══════════════════════════════════════════════════════ */

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

:root {
  /* Light theme (default) */
  --c-bg:         #F9F6F0;
  --c-bg2:        #FFFFFF;
  --c-bg3:        #EEE9DF;
  --c-surface:    #FFFFFF;
  --c-border:     #E0D8CC;
  --c-text:       #2A2117;
  --c-text2:      #6B5E4A;
  --c-text3:      #A09282;
  --c-accent:     #8B5E3C;
  --c-accent2:    #C28A58;
  --c-highlight:  rgba(194, 138, 88, 0.25);
  --c-active-toc: rgba(139, 94, 60, 0.12);

  /* Typography */
  --font-serif:  'Lora', 'Georgia', serif;
  --font-sans:   'DM Sans', 'Helvetica Neue', sans-serif;
  --font-display:'Playfair Display', 'Georgia', serif;

  /* Spacing */
  --topbar-h:    60px;
  --bottombar-h: 80px;
  --tts-h:       110px;
  --sidebar-w:   280px;

  /* Transitions */
  --t-fast:  0.15s ease;
  --t-med:   0.25s ease;
  --t-slow:  0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.16), 0 8px 16px rgba(0,0,0,0.08);

  /* Reader font settings (overridden by JS) */
  --reader-font-size:    18px;
  --reader-line-height:  1.8;
  --reader-margin:       48px;
  --reader-font-family:  var(--font-serif);
}

/* ─── Dark Theme ────────────────────────────────────── */
.theme-dark {
  --c-bg:         #1A1612;
  --c-bg2:        #221E18;
  --c-bg3:        #2C2720;
  --c-surface:    #2C2720;
  --c-border:     #3D3528;
  --c-text:       #E8DFD0;
  --c-text2:      #A99882;
  --c-text3:      #6B5E4A;
  --c-accent:     #D4976A;
  --c-accent2:    #E8B88A;
  --c-highlight:  rgba(212, 151, 106, 0.2);
  --c-active-toc: rgba(212, 151, 106, 0.12);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.35);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.4);
}

/* ─── Sepia Theme ───────────────────────────────────── */
.theme-sepia {
  --c-bg:         #F4ECD8;
  --c-bg2:        #FBF5E6;
  --c-bg3:        #EAE0CA;
  --c-surface:    #FBF5E6;
  --c-border:     #D9CDB4;
  --c-text:       #3D2B1A;
  --c-text2:      #7A5C3E;
  --c-text3:      #A08060;
  --c-accent:     #7A4A2A;
  --c-accent2:    #B07040;
  --c-highlight:  rgba(176, 112, 64, 0.2);
  --c-active-toc: rgba(122, 74, 42, 0.1);
}

/* ─── Base Elements ─────────────────────────────────── */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--t-med), color var(--t-med);
}

/* ─── Pages ─────────────────────────────────────────── */
.page { display: none; min-height: 100vh; }
.page.active { display: flex; flex-direction: column; }
#page-reader.active { overflow: hidden; height: 100vh; }

/* ─── Utility ───────────────────────────────────────── */
.hidden { display: none !important; }

/* ─── Scrollbar ─────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-text3); }

/* ══════════════════════════════════════════════════════
   LIBRARY PAGE
   ══════════════════════════════════════════════════════ */

/* ─── Library Header ─────────────────────────────────── */
.lib-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--t-med);
}

.lib-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
}

.lib-header__brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.brand-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -0.01em;
}

.lib-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── Library Main ────────────────────────────────────── */
.lib-main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

/* ─── Empty State ─────────────────────────────────────── */
.library-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  gap: 16px;
  text-align: center;
}

.empty-illustration svg { width: 120px; height: 120px; }

.empty-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--c-text);
}

.empty-desc {
  font-size: 1rem;
  color: var(--c-text2);
  margin-bottom: 8px;
}

/* ─── Book Grid ───────────────────────────────────────── */
.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 28px;
}

@media (min-width: 640px) {
  .library-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}

@media (min-width: 1024px) {
  .library-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}

/* ─── Book Card ───────────────────────────────────────── */
.book-card {
  position: relative;
  cursor: pointer;
  transition: transform var(--t-med);
  animation: cardIn 0.4s ease both;
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.book-card:hover { transform: translateY(-4px); }
.book-card:hover .book-card__cover-img { box-shadow: var(--shadow-xl); }

.book-card__cover {
  position: relative;
  aspect-ratio: 2/3;
  border-radius: 6px;
  overflow: hidden;
  background: var(--c-bg3);
  margin-bottom: 12px;
}

.book-card__cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: box-shadow var(--t-med);
  box-shadow: var(--shadow-md);
}

/* Spine line decoration */
.book-card__cover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--c-accent2), var(--c-accent));
  opacity: 0.6;
  z-index: 1;
  border-radius: 6px 0 0 6px;
}

.book-card__no-cover {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  gap: 10px;
  background: linear-gradient(135deg, var(--c-bg3) 0%, var(--c-border) 100%);
}

.book-card__no-cover-icon { font-size: 36px; opacity: 0.5; }

.book-card__no-cover-title {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  font-style: italic;
  color: var(--c-text2);
  text-align: center;
  line-height: 1.4;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  display: -webkit-box;
  overflow: hidden;
}

/* Progress bar on cover */
.book-card__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(0,0,0,0.15);
  z-index: 2;
}

.book-card__progress-fill {
  height: 100%;
  background: var(--c-accent);
  transition: width 0.5s ease;
}

/* Delete button */
.book-card__delete {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 3;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.55);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--t-fast);
  backdrop-filter: blur(4px);
}

.book-card__delete svg { width: 14px; height: 14px; }

.book-card:hover .book-card__delete { opacity: 1; }
.book-card__delete:hover { background: rgba(200, 40, 40, 0.8); }

/* Book metadata */
.book-card__title {
  font-family: var(--font-serif);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.35;
  margin-bottom: 4px;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  display: -webkit-box;
  overflow: hidden;
}

.book-card__author {
  font-size: 0.75rem;
  color: var(--c-text3);
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  display: -webkit-box;
  overflow: hidden;
}

.book-card__progress-pct {
  font-size: 0.7rem;
  color: var(--c-accent);
  margin-top: 4px;
  font-weight: 500;
}

/* ─── Buttons ─────────────────────────────────────────── */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: var(--c-text2);
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
  flex-shrink: 0;
}

.btn-icon svg { width: 20px; height: 20px; }
.btn-icon:hover { background: var(--c-bg3); color: var(--c-text); }
.btn-icon:active { transform: scale(0.94); }

.btn-upload {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 10px;
  border: 1.5px solid var(--c-accent);
  background: transparent;
  color: var(--c-accent);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
}

.btn-upload svg { width: 17px; height: 17px; }
.btn-upload:hover { background: var(--c-accent); color: #fff; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  border: none;
  background: var(--c-accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: opacity var(--t-fast), transform var(--t-fast);
}

.btn-primary svg { width: 18px; height: 18px; }
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

.btn-secondary {
  padding: 10px 20px;
  border-radius: 8px;
  border: 1.5px solid var(--c-border);
  background: transparent;
  color: var(--c-text2);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--t-fast);
}

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

.btn-danger {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  background: #DC2626;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--t-fast);
}

.btn-danger:hover { opacity: 0.85; }

/* ─── Import Overlay ──────────────────────────────────── */
.import-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.import-card {
  background: var(--c-surface);
  border-radius: 18px;
  padding: 36px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  width: 280px;
  box-shadow: var(--shadow-xl);
}

.import-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--c-border);
  border-top-color: var(--c-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.import-label {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--c-text2);
  text-align: center;
}

.import-bar {
  width: 100%;
  height: 4px;
  background: var(--c-border);
  border-radius: 2px;
  overflow: hidden;
}

.import-bar__fill {
  height: 100%;
  background: var(--c-accent);
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s ease;
}

/* ══════════════════════════════════════════════════════
   READER PAGE
   ══════════════════════════════════════════════════════ */

/* ─── Reader Top Bar ─────────────────────────────────── */
.reader-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--topbar-h);
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  padding: 0 8px 0 4px;
  gap: 4px;
  transition: transform var(--t-med), background var(--t-med);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.reader-topbar.hidden-bar { transform: translateY(-100%); }

.reader-topbar__left {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  min-width: 0;
}

.reader-topbar__title-wrap {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0 4px;
}

.reader-topbar__title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reader-topbar__chapter {
  font-size: 0.72rem;
  color: var(--c-text3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

.reader-topbar__right {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
}

/* ─── Reader Layout ──────────────────────────────────── */
.reader-layout {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  overflow: hidden;
}

/* ─── TOC Sidebar ────────────────────────────────────── */
.reader-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--c-bg2);
  border-right: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateX(0);
  transition: transform var(--t-slow), width var(--t-slow);
  z-index: 150;
}

.reader-sidebar.collapsed {
  width: 0;
  transform: translateX(-100%);
}

/* Mobile sidebar */
@media (max-width: 768px) {
  .reader-sidebar {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    bottom: 0;
    width: 85%;
    max-width: 320px;
    transform: translateX(-100%);
    box-shadow: var(--shadow-xl);
  }

  .reader-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    position: fixed;
    inset: 0;
    z-index: 140;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(2px);
  }

  .sidebar-overlay.hidden { display: none !important; }
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0;
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-text);
}

.toc-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}

.toc-loading {
  padding: 24px 20px;
  font-size: 0.85rem;
  color: var(--c-text3);
  text-align: center;
}

.toc-item {
  display: block;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 0.83rem;
  color: var(--c-text2);
  text-decoration: none;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  line-height: 1.45;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.toc-item:hover {
  background: var(--c-bg3);
  color: var(--c-text);
}

.toc-item.active {
  background: var(--c-active-toc);
  color: var(--c-accent);
  border-left-color: var(--c-accent);
  font-weight: 500;
}

.toc-item--sub { padding-left: 36px; font-size: 0.78rem; }

/* ─── Reading Content Area ───────────────────────────── */
.reader-content-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.epub-container {
  flex: 1;
  overflow-y: auto;
  scroll-behavior: smooth;
  padding-bottom: calc(var(--bottombar-h) + var(--tts-h) + 32px);
}

.reader-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 16px;
  color: var(--c-text3);
  font-size: 0.9rem;
}

.reader-loading__spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--c-border);
  border-top-color: var(--c-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ─── Rendered EPUB content ─────────────────────────── */
.epub-content {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--reader-margin) var(--reader-margin) 48px;
  font-family: var(--reader-font-family);
  font-size: var(--reader-font-size);
  line-height: var(--reader-line-height);
  color: var(--c-text);
  transition: font-size 0.2s, line-height 0.2s, color var(--t-med);
}

.epub-content h1, .epub-content h2, .epub-content h3,
.epub-content h4, .epub-content h5, .epub-content h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--c-text);
  margin-top: 2em;
  margin-bottom: 0.6em;
  line-height: 1.25;
}

.epub-content h1 { font-size: 2em; }
.epub-content h2 { font-size: 1.6em; }
.epub-content h3 { font-size: 1.3em; }

.epub-content p {
  margin-bottom: 1em;
  text-align: justify;
  hyphens: auto;
  -webkit-hyphens: auto;
}

.epub-content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 1.5em auto;
  display: block;
}

.epub-content a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.epub-content blockquote {
  border-left: 3px solid var(--c-accent);
  margin: 1.5em 0;
  padding: 0.5em 1.5em;
  color: var(--c-text2);
  font-style: italic;
}

.epub-content hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 2.5em auto;
  width: 60%;
}

/* ─── TTS Sentence Highlight ─────────────────────────── */
.tts-sentence {
  cursor: pointer;
  border-radius: 3px;
  transition: background 0.2s;
  padding: 0 2px;
  margin: 0 -2px;
}

.tts-sentence:hover { background: var(--c-highlight); }

.tts-sentence.tts-active {
  background: var(--c-highlight);
  outline: 1.5px solid var(--c-accent2);
  outline-offset: 1px;
}

/* ─── Reader Bottom Bar ──────────────────────────────── */
.reader-bottombar {
  position: fixed;
  bottom: var(--tts-h);
  left: 0;
  right: 0;
  z-index: 180;
  background: var(--c-bg);
  border-top: 1px solid var(--c-border);
  padding: 10px 16px;
  transition: transform var(--t-med), background var(--t-med);
}

.reader-bottombar.hidden-bar { transform: translateY(100%); }

.bottombar-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.progress-track {
  flex: 1;
  position: relative;
  height: 4px;
  background: var(--c-border);
  border-radius: 2px;
}

.progress-fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background: var(--c-accent);
  border-radius: 2px;
  pointer-events: none;
  transition: width 0.3s;
}

.progress-slider {
  position: absolute;
  inset: -8px 0;
  width: 100%;
  opacity: 0;
  cursor: pointer;
  height: 20px;
}

.progress-label {
  font-size: 0.75rem;
  color: var(--c-text3);
  font-weight: 500;
  width: 36px;
  text-align: right;
  flex-shrink: 0;
}

.bottombar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.btn-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: none;
  background: transparent;
  color: var(--c-text2);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  cursor: pointer;
  border-radius: 8px;
  transition: background var(--t-fast), color var(--t-fast);
}

.btn-nav svg { width: 16px; height: 16px; }
.btn-nav:hover { background: var(--c-bg3); color: var(--c-text); }

.chapter-indicator {
  font-size: 0.78rem;
  color: var(--c-text3);
  font-weight: 500;
}

/* ─── TTS Bar ────────────────────────────────────────── */
.tts-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 190;
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
  padding: 10px 16px;
  transition: background var(--t-med);
}

.tts-bar__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 1000px;
  margin: 0 auto;
}

.tts-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.tts-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--c-text2);
  cursor: pointer;
  transition: color var(--t-fast), transform var(--t-fast);
  border-radius: 50%;
}

.tts-btn:hover { color: var(--c-text); transform: scale(1.1); }
.tts-btn:active { transform: scale(0.94); }

.tts-btn--play {
  width: 48px;
  height: 48px;
  background: var(--c-accent);
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 2px 12px rgba(139, 94, 60, 0.4);
  transition: background var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}

.tts-btn--play svg { width: 20px; height: 20px; }
.tts-btn--play:hover { background: var(--c-accent2); color: #fff; transform: scale(1.08); }

.tts-btn--stop svg,
.tts-btn--prev svg,
.tts-btn--next svg { width: 18px; height: 18px; }

.tts-btn--stop { color: var(--c-text3); }
.tts-btn--stop:hover { color: #DC2626; }

.tts-meta {
  flex: 1;
  min-width: 0;
}

.tts-voice-label {
  font-size: 0.78rem;
  color: var(--c-text3);
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tts-extras {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 180px;
}

.tts-speed {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tts-speed__label {
  font-size: 0.7rem;
  color: var(--c-text3);
  flex-shrink: 0;
}

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

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

.tts-speed__val {
  font-size: 0.72rem;
  color: var(--c-text2);
  font-weight: 600;
  min-width: 30px;
  text-align: right;
}

.tts-voice-select {
  width: 100%;
  padding: 4px 8px;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  cursor: pointer;
  outline: none;
}

/* Mobile TTS Bar */
@media (max-width: 600px) {
  .tts-bar__inner { gap: 10px; }
  .tts-extras { min-width: 130px; }
  .tts-meta { display: none; }
}

/* ══════════════════════════════════════════════════════
   SETTINGS PANEL
   ══════════════════════════════════════════════════════ */

.settings-panel {
  position: fixed;
  inset: 0;
  z-index: 400;
}

.settings-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(3px);
}

.settings-drawer {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 90vw;
  background: var(--c-surface);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px;
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0;
}

.settings-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text);
}

.settings-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.settings-group { display: flex; flex-direction: column; gap: 10px; }

.settings-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-text2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.settings-label span {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--c-accent);
  text-transform: none;
  letter-spacing: 0;
  margin-left: 8px;
}

.theme-pills, .font-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.theme-pill, .font-pill {
  padding: 8px 16px;
  border-radius: 20px;
  border: 1.5px solid var(--c-border);
  background: transparent;
  color: var(--c-text2);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
}

.theme-pill:hover, .font-pill:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.theme-pill.active, .font-pill.active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}

.settings-slider {
  width: 100%;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--c-border);
  outline: none;
  cursor: pointer;
}

.settings-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--c-accent);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.range-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.range-min, .range-max {
  font-family: var(--font-serif);
  color: var(--c-text3);
  flex-shrink: 0;
  user-select: none;
}

.range-min { font-size: 0.75rem; }
.range-max { font-size: 1.1rem; }

/* ══════════════════════════════════════════════════════
   MODALS & TOASTS
   ══════════════════════════════════════════════════════ */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  backdrop-filter: blur(4px);
}

.modal-box {
  background: var(--c-surface);
  border-radius: 18px;
  padding: 28px;
  max-width: 360px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  animation: scaleIn 0.2s ease;
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 10px;
}

.modal-body {
  font-size: 0.9rem;
  color: var(--c-text2);
  line-height: 1.6;
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* Toasts */
.toast-container {
  position: fixed;
  bottom: calc(var(--tts-h) + var(--bottombar-h) + 16px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 600;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--c-text);
  color: var(--c-bg);
  padding: 10px 18px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  font-family: var(--font-sans);
  white-space: nowrap;
  animation: toastIn 0.25s ease, toastOut 0.3s ease 2.7s forwards;
  box-shadow: var(--shadow-lg);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px) scale(0.9); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(-12px) scale(0.9); }
}

/* ══════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  :root {
    --topbar-h: 54px;
    --bottombar-h: 72px;
    --tts-h: 100px;
    --reader-margin: 20px;
    --reader-font-size: 17px;
  }

  .lib-header__inner { padding: 0 16px; }
  .lib-main { padding: 20px 16px 60px; }
  .brand-name { font-size: 1.25rem; }

  .epub-content {
    padding: var(--reader-margin) var(--reader-margin) 32px;
    font-size: var(--reader-font-size);
  }

  .tts-extras { min-width: 140px; }

  .library-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 18px;
  }
}

@media (max-width: 480px) {
  .library-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .tts-bar__inner { flex-wrap: wrap; }
  .tts-extras { width: 100%; flex-direction: row; min-width: 0; }
}

/* ─── Desktop sidebar always open ───────────────────── */
@media (min-width: 769px) {
  .reader-sidebar { position: relative; transform: none !important; }
  .reader-sidebar.collapsed { width: 0; overflow: hidden; }
  .sidebar-close { display: none; }
  .sidebar-overlay { display: none !important; }
}

/* ─── Bookmarks badge ────────────────────────────────── */
.btn-icon.bookmarked svg {
  fill: var(--c-accent);
  stroke: var(--c-accent);
}

/* ─── Chapter content separator ─────────────────────── */
.chapter-title-block {
  text-align: center;
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 40px;
}

.chapter-title-block h2 {
  font-family: var(--font-display);
  font-size: 1.8em;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.2;
  margin: 0;
}

.chapter-title-block .chapter-number {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-accent);
  font-weight: 600;
  margin-bottom: 12px;
  font-family: var(--font-sans);
}