/* ══════════════════════════════════════════════════════════════
   EPUB Reader — Chapter Reader Styles
   Supports Dark / Light / Sepia themes.
   Font: Inter (UI), Merriweather/Lora/Source Serif (reading)
   Icons: Material Icons Round
   ══════════════════════════════════════════════════════════════ */

@import url('/static/css/theme.css');
@import url('/static/css/components.css');

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Reader-specific (overridden by JS) */
  --font-size: 18px;
  --line-height: 1.8;
  --max-width: 720px;
  --para-spacing: 1.5em;
  --font-family: "Inter", sans-serif;
  --font-spacing: 0px;
  --font-scale: 1;
  --margin-left: 24px;
  --margin-right: 24px;
  --margin-top: 36px;
  --margin-bottom: 60px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

body[data-read-mode="paged"] {
  overflow: hidden;
  height: 100vh;
}

body[data-read-mode="paged"] .test-notice-footer {
  display: none;
}

::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ── Progress Bar ──────────────────────────────────────────── */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border);
  z-index: 200;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #9f6cff);
  width: 0%;
  transition: width 0.15s ease;
}

/* ── Header ────────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 150;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: transform 0.3s ease;
  backdrop-filter: blur(12px);
}

.header.hidden {
  transform: translateY(-100%);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.header-title {
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}

/* (Icon Button defined in components.css) */

/* ── TOC Sidebar ───────────────────────────────────────────── */
.toc-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.3s,
    visibility 0.3s;
}
.toc-overlay.open {
  opacity: 1;
  visibility: visible;
}

.toc-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 310;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}
.toc-sidebar.open {
  transform: translateX(0);
}

.toc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.toc-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.toc-search {
  padding: 12px 18px;
  position: relative;
  flex-shrink: 0;
}
.toc-search-icon {
  position: absolute;
  left: 28px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--text-secondary);
}
.toc-search input {
  width: 100%;
  padding: 10px 12px 10px 38px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}
.toc-search input:focus {
  border-color: var(--accent);
}

.toc-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  padding: 8px 12px 20px;
}
.toc-item {
  margin-bottom: 4px;
}
.toc-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--transition);
}
.toc-link:hover {
  background: var(--surface-hover);
}
.nav-btn:hover {
  background: var(--surface-hover);
}

/* ── Reading Modes ─────────────────────────────────────────── */

/* Continuous Mode - Hide bottom navigation since it auto-loads */
body[data-read-mode="continuous"] .chapter-nav {
  display: none;
}

/* Paged Mode */
body[data-read-mode="paged"] .reader-container {
  overflow: hidden;
  padding: 0 !important;
  height: 0;
  min-height: 0;
}

body[data-read-mode="paged"] .chapter-nav {
  display: none;
}

/* Page flip book container */
.page-flip-container {
  display: none;
  width: 100vw;
  height: calc(100vh - 140px); /* header + nav space */
  position: relative;
  overflow: hidden !important;
}

body[data-read-mode="paged"] .page-flip-container {
  display: block;
}

body[data-read-mode="paged"] .chapter-container {
  display: none;
}

/* Paged mode navigation */
.paged-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: none;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  z-index: 100;
  backdrop-filter: blur(12px);
}

body[data-read-mode="paged"] .paged-nav {
  display: flex;
}

.paged-nav-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.paged-nav-btn:disabled {
  opacity: 0.3;
  pointer-events: none;
}

.paged-page-info {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 80px;
  text-align: center;
}

.paged-progress {
  flex: 1;
  max-width: 200px;
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.paged-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.toc-link.active {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}
.toc-num {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 24px;
}
.toc-link.active .toc-num {
  color: rgba(255, 255, 255, 0.8);
}

/* ── Search Overlay ────────────────────────────────────────── */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 400;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 80px;
}
.search-overlay.open {
  display: flex;
}

.search-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 92%;
  max-width: 600px;
  max-height: 70vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}
.search-input-wrapper .material-icons-round {
  color: var(--text-secondary);
  font-size: 22px;
  flex-shrink: 0;
}
.search-input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
  outline: none;
}
.search-close {
  flex-shrink: 0;
}

.search-results {
  overflow-y: auto;
  padding: 12px 16px;
  max-height: calc(70vh - 70px);
}

.search-empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 30px 10px;
  font-size: 14px;
}

.search-count {
  padding: 8px 0 12px;
  font-size: 12px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
}

.search-result-item {
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.6;
  transition: border-color var(--transition);
}
.search-result-item:hover {
  border-color: var(--accent);
}
.search-result-item mark {
  background: var(--accent);
  color: #fff;
  padding: 1px 4px;
  border-radius: 3px;
}

/* ── TTS Panel ─────────────────────────────────────────────── */
.tts-panel {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 360px;
  /* Colors/borders/radius come from vo-card component in components.css */
  background: var(--bg-panel, var(--surface));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 18px;
  z-index: 500;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 2px 8px rgba(0,0,0,0.15);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: none;
  flex-direction: column;
  gap: 2px;
}
.tts-panel.open {
  display: flex;
}

/* Ensure the voice custom-select dropdown appears above other content and is wide enough for long names */
.tts-panel .vo-select-dropdown {
  z-index: 600;
  min-width: 320px;
  right: 0;
  left: auto;
  white-space: nowrap;
}
.tts-panel .vo-select-option {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}


/* ══════════════════════════════════════════════════════════════
   VISUAL OPTIONS PANEL — Moon+ Reader Style
   ══════════════════════════════════════════════════════════════ */
.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 350;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.3s,
    visibility 0.3s;
}
.settings-overlay.open {
  opacity: 1;
  visibility: visible;
}

.settings-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 380px;
  max-width: 100vw;
  height: 100vh;
  background: #0d0e14;
  border-left: 1px solid rgba(255,255,255,0.06);
  z-index: 360;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.settings-panel.open {
  transform: translateX(0);
}

[data-theme="light"] .settings-panel {
  background: #f0f1f5;
  border-left-color: rgba(0,0,0,0.08);
}

[data-theme="sepia"] .settings-panel {
  background: #e8dcc0;
  border-left-color: rgba(0,0,0,0.08);
}

/* ── Panel Header ──────────────────────────────────────── */
.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
  background: rgba(255,255,255,0.02);
}

[data-theme="light"] .settings-header,
[data-theme="sepia"] .settings-header {
  border-bottom-color: rgba(0,0,0,0.08);
  background: rgba(0,0,0,0.02);
}

.settings-header h3 {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.settings-header .panel-search-btn {
  width: 32px;
  height: 32px;
  color: var(--text-secondary);
}

/* ── Scrollable Body ───────────────────────────────────── */
.settings-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 12px 20px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}

.settings-body::-webkit-scrollbar {
  width: 4px;
}
.settings-body::-webkit-scrollbar-track {
  background: transparent;
}
.settings-body::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
}

/* ── Reusable UI Components imported from /static/css/components.css ── */

/* ── Font Size Scroll Picker (Moon+ drum-style) ────────── */
.vo-fontsize-drum {
  position: relative;
  height: 140px;
  overflow: hidden;
  width: 100%;
  mask-image: linear-gradient(to bottom, transparent 0%, black 30%, black 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 30%, black 70%, transparent 100%);
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.vo-fontsize-drum:active {
  cursor: grabbing;
}

.vo-fontsize-drum-inner {
  position: absolute;
  width: 100%;
  text-align: center;
  transition: transform 0.15s ease;
}

.vo-fs-item {
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
  transition: all 0.15s ease;
  cursor: pointer;
}

.vo-fs-item span {
  transition: all 0.15s ease;
}

.vo-fs-item.active span {
  font-size: 34px;
  font-weight: 700;
  color: var(--text);
}

.vo-fs-item.adjacent span {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-secondary);
  opacity: 0.6;
}

.vo-fs-item.far span {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  opacity: 0.25;
}

.vo-fs-center-line {
  position: absolute;
  top: 50%;
  left: 10%;
  right: 10%;
  height: 46px;
  transform: translateY(-50%);
  border-top: 1px solid var(--accent-transparent);
  border-bottom: 1px solid var(--accent-transparent);
  pointer-events: none;
  z-index: 1;
}


/* ── Font Weight Sub-label ─────────────────────────────── */
.vo-sub-label {
  font-size: 11px;
  color: var(--text-secondary);
  text-align: center;
  margin-top: -2px;
}

.vo-anim-paged-only {
  font-size: 11px;
  color: var(--text-secondary);
  opacity: 0.7;
  text-align: center;
  padding: 6px;
  font-style: italic;
}

.vo-anim-paged-only.hidden {
  display: none;
}

/* ── Bottom Tab Buttons ────────────────────────────────── */
.settings-footer {
  display: flex;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
  background: rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .settings-footer,
[data-theme="sepia"] .settings-footer {
  border-top-color: rgba(0, 0, 0, 0.08);
  background: rgba(0, 0, 0, 0.04);
}

.settings-footer-btn {
  flex: 1;
  padding: 14px 12px;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
  border-radius: 0;
}

.settings-footer-btn:first-child {
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

[data-theme="light"] .settings-footer-btn:first-child,
[data-theme="sepia"] .settings-footer-btn:first-child {
  border-right-color: rgba(0, 0, 0, 0.06);
}

.settings-footer-btn:hover {
  background: rgba(108, 138, 255, 0.08);
  color: var(--accent);
}

.settings-footer-btn.active {
  background: rgba(108, 138, 255, 0.12);
  color: var(--accent);
}

/* ── Page Transition Effects (applied to reader) ───────── */
.reader-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--margin-top) var(--margin-right) 24px var(--margin-left);
}

/* Page flip: Fade In */
@keyframes fadeInPage {
  from { opacity: 0; }
  to { opacity: 1; }
}
body[data-page-anim="fade"] .reader-container {
  animation: fadeInPage 0.4s ease;
}

/* Page flip: Slide */
@keyframes slidePage {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}
body[data-page-anim="slide"] .reader-container {
  animation: slidePage 0.35s ease;
}

/* Page flip: Shift Vertically */
@keyframes shiftVPage {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
body[data-page-anim="shift-v"] .reader-container {
  animation: shiftVPage 0.35s ease;
}

/* Page flip: Flip */
@keyframes flipPage {
  from { opacity: 0; transform: perspective(800px) rotateY(-8deg); }
  to { opacity: 1; transform: perspective(800px) rotateY(0); }
}
body[data-page-anim="flip"] .reader-container {
  animation: flipPage 0.45s ease;
}

/* Page flip: Rotate */
@keyframes rotatePage {
  from { opacity: 0; transform: rotate(2deg) scale(0.95); }
  to { opacity: 1; transform: rotate(0) scale(1); }
}
body[data-page-anim="rotate"] .reader-container {
  animation: rotatePage 0.4s ease;
}

/* Page flip: Curl (CSS fallback, realistic uses StPageFlip) */
@keyframes curlPage {
  from { opacity: 0; transform: perspective(600px) rotateY(-15deg) scale(0.9); }
  to { opacity: 1; transform: perspective(600px) rotateY(0) scale(1); }
}
body[data-page-anim="curl"] .reader-container {
  animation: curlPage 0.5s ease;
}

/* Realistic/Curl in paged mode use StPageFlip, no CSS animation needed */
body[data-page-anim="realistic"] .reader-container {
  animation: none;
}

/* ── Legacy settings-group backward compat ─────────────── */
.settings-group {
  padding: 18px 22px 0;
}

.settings-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.theme-buttons {
  display: flex;
  gap: 8px;
}

/* (Theme Button defined in components.css) */

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

.slider {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}
.slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

.slider-value {
  min-width: 48px;
  text-align: right;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.font-select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}



/* ── Chapter Content ───────────────────────────────────── */
.chapter-header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.book-title-link {
  display: inline-block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  transition: opacity var(--transition);
}
.book-title-link:hover {
  opacity: 0.8;
}

.chapter-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
}

.chapter-info {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ── Chapter Content ───────────────────────────────────────── */
.chapter-content {
  font-size: var(--font-size);
  line-height: var(--line-height);
  font-family: var(--font-family);
  letter-spacing: var(--font-spacing);
  transform: scaleX(var(--font-scale));
  transform-origin: left top;
}

/* Font Overrides */

/* Paged mode page styling */
.stf__parent {
  margin: 0 auto;
}

.page-flip-page {
  background: var(--bg);
  padding: 0;
  font-size: var(--font-size);
  line-height: var(--line-height);
  font-family: var(--font-family);
  letter-spacing: var(--font-spacing);
  color: var(--text);
  overflow: hidden;
  box-sizing: border-box;
}

.page-flip-page p {
  margin-bottom: var(--para-spacing);
}

.chapter-content p {
  margin-bottom: var(--para-spacing);
}

/* ── Custom Typography Override ────────────────────────────── */
/* Always force our typography settings on everything inside, 
   but leave borders, colors, and layout from publisher intact. */
#readerBody #readerMain .chapter-content p,
#readerBody #readerMain .chapter-content span,
#readerBody #readerMain .chapter-content div,
#readerBody #readerMain .chapter-content a,
#readerBody #readerMain .chapter-content li,
#readerBody #pageFlipContainer .chapter-content p,
#readerBody #pageFlipContainer .chapter-content span,
#readerBody #pageFlipContainer .chapter-content div,
#readerBody #pageFlipContainer .chapter-content a,
#readerBody #pageFlipContainer .chapter-content li {
  font-size: var(--font-size) !important;
  line-height: var(--line-height) !important;
  font-family: var(--font-family) !important;
  font-variant-caps: normal !important;
  letter-spacing: var(--font-spacing) !important;
}

#readerBody #readerMain .chapter-content p,
#readerBody #pageFlipContainer .chapter-content p {
  margin-top: 0 !important;
  margin-bottom: var(--para-spacing) !important;
}

#readerBody .chapter-content.justify-on,
#readerBody .chapter-content.justify-on p,
#readerBody .chapter-content.justify-on div,
#readerBody .chapter-content.justify-on span,
#readerBody .chapter-content.justify-on li {
  text-align: justify !important;
}

#readerBody .chapter-content.hyphen-on,
#readerBody .chapter-content.hyphen-on p,
#readerBody .chapter-content.hyphen-on span,
#readerBody .chapter-content.hyphen-on div,
#readerBody .chapter-content.hyphen-on a,
#readerBody .chapter-content.hyphen-on li {
  hyphens: auto !important;
  -webkit-hyphens: auto !important;
  word-break: break-word;
}

#readerBody #readerMain .chapter-content h1,
#readerBody #readerMain .chapter-content h2,
#readerBody #readerMain .chapter-content h3,
#readerBody #readerMain .chapter-content h4,
#readerBody #readerMain .chapter-content h5,
#readerBody #readerMain .chapter-content h6,
#readerBody #pageFlipContainer .chapter-content h1,
#readerBody #pageFlipContainer .chapter-content h2,
#readerBody #pageFlipContainer .chapter-content h3,
#readerBody #pageFlipContainer .chapter-content h4,
#readerBody #pageFlipContainer .chapter-content h5,
#readerBody #pageFlipContainer .chapter-content h6 {
  font-family: var(--font-family) !important;
  line-height: 1.3 !important;
}

.chapter-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 1.5em auto;
  display: block;
}

.chapter-content h1,
.chapter-content h2,
.chapter-content h3,
.chapter-content h4 {
  margin: 2em 0 0.8em;
  line-height: 1.3;
}

.chapter-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.chapter-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  margin: 1.5em 0;
  color: var(--text-secondary);
  font-style: italic;
}

.chapter-content pre,
.chapter-content code {
  background: var(--surface);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.9em;
}

.chapter-content pre {
  padding: 16px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.img-placeholder {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 1.5em 0;
}

/* ── Chapter Navigation ────────────────────────────────────── */
.chapter-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: var(--margin-bottom, 48px);
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
}

.nav-btn:not(.disabled):hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.nav-btn.disabled {
  opacity: 0.3;
  cursor: default;
}

.nav-btn.nav-next {
  justify-content: flex-end;
  text-align: right;
}

.nav-btn .material-icons-round {
  color: var(--accent);
  font-size: 22px;
  flex-shrink: 0;
}

.nav-btn-text {
  min-width: 0;
}

.nav-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.nav-chapter-title {
  display: block;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Reader Stats Bar ──────────────────────────────────────── */
.reader-stats {
  position: fixed;
  bottom: 16px;
  left: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  display: flex;
  gap: 18px;
  font-size: 12px;
  color: var(--text-secondary);
  z-index: 90;
  box-shadow: var(--shadow);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 5px;
}
.stat-item .material-icons-round {
  font-size: 16px;
}


/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .header-title {
    max-width: 160px;
  }
  .header-actions {
    gap: 0;
  }
  .icon-btn {
    width: 34px;
    height: 34px;
  }
  .icon-btn .material-icons-round {
    font-size: 20px;
  }

  .reader-container {
    padding: var(--margin-top) var(--margin-right) 24px var(--margin-left);
  }
  .chapter-title {
    font-size: 22px;
  }

  .chapter-nav {
    grid-template-columns: 1fr;
  }

  .settings-panel {
    width: 100%;
    top: auto;
    bottom: 0;
    height: auto;
    max-height: 88vh;
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 18px 18px 0 0;
    transform: translateY(100%);
  }
  .settings-panel.open {
    transform: translateY(0);
  }

  .reader-stats {
    bottom: 8px;
    left: 8px;
    right: 60px;
    justify-content: space-around;
    gap: 10px;
  }

  .tts-panel {
    bottom: 0;
    right: 0;
    left: 0;
    width: 100%;
    border-radius: var(--radius) var(--radius) 0 0;
  }
}

/* ── Fallbacks for Toggles OFF ─────────────────────────────── */
/* Override publisher defaults when toggles are OFF, using @scope 
   so we don't accidentally override publisher's specific classes */
/* Override publisher defaults by unsetting them globally on base elements, 
   allowing inheritance from parent divs or the container */
:where(#readerBody .chapter-content) p:not(noscript),
:where(#readerBody .chapter-content) div:not(noscript),
:where(#readerBody .chapter-content) li:not(noscript) {
  text-align: unset;
}

#readerBody .chapter-content:not(.justify-on) {
  text-align: left !important;
}

/* ── EPUB Responsive Images & Media (Fit Viewport) ────────── */
.chapter-content img,
.chapter-content svg,
.chapter-content picture,
.chapter-content figure,
.page-flip-page img {
  max-width: 100% !important;
  max-height: calc(100vh - 120px) !important;
  height: auto !important;
  width: auto !important;
  object-fit: contain !important;
  display: block;
  margin: 16px auto;
  box-sizing: border-box;
  page-break-inside: avoid;
  break-inside: avoid;
}

body[data-read-mode="paged"] .chapter-content img,
body[data-read-mode="paged"] .page-flip-page img {
  max-height: calc(100vh - var(--margin-top, 36px) - var(--margin-bottom, 60px) - 150px) !important;
  max-width: 100% !important;
  height: auto !important;
  width: auto !important;
  object-fit: contain !important;
  margin: 8px auto !important;
}

/* ── Bluelight Filter ───────────────────────────────────────── */
:root { --bluelight-opacity: 0.18; }
#bluelightOverlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(255, 147, 41, var(--bluelight-opacity));
  pointer-events: none;
  z-index: 9000;
  mix-blend-mode: multiply;
  transition: opacity 0.4s ease;
}
body.bluelight-on #bluelightOverlay {
  display: block;
}

/* ── Reading Ruler ──────────────────────────────────────────── */
#readingRuler {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent) 20%, var(--accent) 80%, transparent);
  pointer-events: none;
  z-index: 8990;
  opacity: 0.7;
  transition: top 0.05s linear;
}
body.ruler-on #readingRuler {
  display: block;
}

/* ── Indent First Line ──────────────────────────────────────── */
#readerBody.indent-on .chapter-content p:first-of-type,
#readerBody.indent-on .chapter-content p {
  text-indent: 2em;
}

/* ── Link Color (CSS variable) ──────────────────────────────── */
:root {
  --link-color: var(--accent);
}
#readerBody .chapter-content a {
  color: var(--link-color) !important;
  text-decoration: none !important;
}
#readerBody .chapter-content a * {
  color: inherit !important;
}
#readerBody .chapter-content a:hover {
  text-decoration: none !important;
}

/* ── Auto-Scroll Indicator ──────────────────────────────────── */
#autoScrollIndicator {
  display: none;
  position: fixed;
  bottom: 80px;
  right: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  z-index: 400;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
  cursor: pointer;
  user-select: none;
  transition: opacity 0.3s;
}
#autoScrollIndicator.active {
  display: flex;
}
#autoScrollIndicator .as-icon {
  font-size: 18px;
  color: var(--accent);
  animation: aspin 1s linear infinite;
}
@keyframes aspin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* bookmark button is controlled server-side via Jinja2 {% if user %} */