.reader-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  flex-direction: column;
}
.reader-overlay.active { display: flex; animation: readerIn .3s ease; }
@keyframes readerIn { from { opacity: 0; } to { opacity: 1; } }
.reader-overlay[data-skin="white"] { background: #f5f3ee; }
.reader-overlay[data-skin="white"] .reader-content { color: #2c2416; }
.reader-overlay[data-skin="cream"] { background: #faf3e0; }
.reader-overlay[data-skin="cream"] .reader-content { color: #3d3220; }
.reader-overlay[data-skin="green"] { background: #c8e6c9; }
.reader-overlay[data-skin="green"] .reader-content { color: #1b3b1b; }
.reader-overlay[data-skin="dark"] { background: #0d1117; }
.reader-overlay[data-skin="dark"] .reader-content { color: #c9d1d9; }
.reader-content {
  position: relative;
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  font-size: 17px;
  line-height: 2;
  -webkit-overflow-scrolling: touch;
  color: var(--text);
}
.reader-content p { text-indent: 2em; margin-bottom: 0.8em; letter-spacing: 0.02em; word-spacing: 0.05em; }
.reader-tap-zone { position: absolute; top: 0; bottom: 0; z-index: 5; }
.reader-tap-zone.left { left: 0; width: 30%; }
.reader-tap-zone.center { left: 30%; width: 40%; }
.reader-tap-zone.right { left: 70%; width: 30%; }
.reader-content .section-break { text-indent: 0; text-align: center; color: var(--text3); letter-spacing: 0.5em; margin: 1.5em 0; font-size: 13px; }
.reader-content.paged {
  overflow: hidden;
  position: relative;
}
.reader-page {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  padding: 4px 0;
  transition: transform .3s ease;
}
.reader-page-indicator {
  position: fixed;
  bottom: 50px;
  right: 16px;
  font-size: 11px;
  color: inherit;
  opacity: 0.4;
  pointer-events: none;
  z-index: 10;
}
.toc-sidebar {
  position: fixed;
  top: 0; right: -85vw; bottom: 0;
  width: 85vw; max-width: 360px;
  background: var(--bg);
  z-index: 210;
  display: flex;
  flex-direction: column;
  transition: right .25s ease;
  box-shadow: -4px 0 20px rgba(0,0,0,.3);
}
.toc-sidebar.open { right: 0; }
.toc-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.toc-sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}
.toc-sidebar-item {
  padding: 10px 16px;
  font-size: 13px;
  cursor: pointer;
  border-left: 3px solid transparent;
  color: var(--text2);
}
.toc-sidebar-item.current {
  border-left-color: var(--accent2);
  color: var(--text);
  font-weight: 600;
  background: var(--bg2);
}
.toc-sidebar-item .toc-wordcount {
  font-size: 11px;
  color: var(--text3);
  margin-left: 8px;
}
.reader-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  font-size: 13px;
  color: inherit;
  opacity: 0.6;
}
.reader-footer {
  text-align: center;
  padding: 8px;
  font-size: 12px;
  opacity: 0.5;
}
.reader-menu {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--glass);
  backdrop-filter: var(--backdrop);
  -webkit-backdrop-filter: var(--backdrop);
  border-top: 1px solid var(--glass-border);
  border-radius: 20px 20px 0 0;
  padding: 20px 20px env(safe-area-inset-bottom, 16px);
  z-index: 210;
  display: none;
  animation: slideUp .25s ease;
}
.reader-menu.active { display: block; }
.reader-menu .menu-row {
  display: flex;
  justify-content: space-around;
  align-items: center;
  margin-bottom: 16px;
}
.reader-menu .menu-row button {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  width: 44px; height: 44px;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
}
.reader-menu .menu-row button:active { border-color: var(--accent); }
.reader-menu .skin-dots { display: flex; gap: 10px; }
.reader-menu .skin-dot {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all .2s;
}
.reader-menu .skin-dot.active { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(240,124,60,.2); }
.reader-menu .menu-btn-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 14px; }
.reader-menu .menu-labeled-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px; padding: 10px 6px 8px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text); font-size: 12px; cursor: pointer; transition: all .15s;
}
.reader-menu .menu-labeled-btn:active { border-color: var(--accent); background: var(--bg2); }
.reader-menu .menu-labeled-btn .mlb-icon { font-size: 20px; line-height: 1; }
.reader-menu .menu-labeled-btn .mlb-text { font-size: 10px; color: var(--text2); }
.reader-menu .skin-dot.white { background: #f5f3ee; }
.reader-menu .skin-dot.cream { background: #faf3e0; }
.reader-menu .skin-dot.green { background: #d5e4cd; }
.reader-menu .skin-dot.dark { background: #1a1f2b; }
.reader-menu .slider-row { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text2); }
.reader-menu .slider-row input { flex: 1; accent-color: var(--accent); }
.reader-menu .toc-list { max-height: 50vh; overflow-y: auto; }
.reader-menu .toc-list .toc-item {
  padding: 12px 14px;
  border-bottom: 1px solid var(--glass-border);
  font-size: 14px;
  cursor: pointer;
  transition: background .15s;
}
.reader-menu .toc-list .toc-item:hover { background: var(--bg2); }
.reader-menu .toc-list .toc-item.current { color: var(--accent); font-weight: 700; }
.reader-content.anim-forward {
  animation: slideInRight .35s ease-out;
}
.reader-content.anim-back {
  animation: slideInLeft .35s ease-out;
}
.reader-menu .menu-labeled-btn.tts-playing {
  border-color: var(--accent) !important;
  background: rgba(240,124,60,.15) !important;
  animation: pulse-tts 1.2s ease-in-out infinite;
}

/* === Reading Progress Bar === */
.reader-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  z-index: 1001;
  transition: width .3s ease;
  border-radius: 0 2px 2px 0;
}

/* === Enhanced Reader Typography === */
.reader-content p {
  text-indent: 2em;
  margin-bottom: 0.9em;
  letter-spacing: 0.02em;
  word-spacing: 0.04em;
  line-height: 2;
}

/* === Page Turn Animation === */
.reader-content.anim-forward {
  animation: pageFlip .35s cubic-bezier(.4,0,.2,1);
}
.reader-content.anim-back {
  animation: pageFlipBack .35s cubic-bezier(.4,0,.2,1);
}
@keyframes pageFlip {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes pageFlipBack {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

/* === Reader Dark Mode Auto === */
@media (prefers-color-scheme: light) {
  .reader-overlay:not([data-skin]) {
    --reader-bg: #f5f3ee;
  }
}

/* === Font Preview Labels === */
.reader-menu .menu-labeled-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 6px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
  transition: all .2s;
  font-family: inherit;
}