/* Fiction Book Reader - Mobile-First Responsive Design */

:root {
  --bg-color: #0f1117;
  --surface-color: #1a1d27;
  --text-color: #e2e8f0;
  --muted-color: #94a3b8;
  --accent-color: #6366f1;
  --accent-hover: #4f46e5;
  --border-color: #2e3447;
  --char-tag-bg: rgba(99, 102, 241, 0.15);
  --char-tag-border: rgba(99, 102, 241, 0.4);
  
  --font-family-body: 'Lora', Georgia, serif;
  --font-family-heading: 'Cinzel', serif;
  --font-family-ui: 'Plus Jakarta Sans', sans-serif;
  --font-size-base: 18px;
  --line-height-base: 1.8;
}

[data-theme="sepia"] {
  --bg-color: #fbf0d9;
  --surface-color: #f3e5c8;
  --text-color: #2c221e;
  --muted-color: #786458;
  --accent-color: #964b00;
  --accent-hover: #7a3d00;
  --border-color: #e2d2b4;
  --char-tag-bg: rgba(150, 75, 0, 0.1);
  --char-tag-border: rgba(150, 75, 0, 0.3);
}

[data-theme="light"] {
  --bg-color: #ffffff;
  --surface-color: #f8fafc;
  --text-color: #0f172a;
  --muted-color: #64748b;
  --accent-color: #4338ca;
  --accent-hover: #3730a3;
  --border-color: #e2e8f0;
  --char-tag-bg: rgba(67, 56, 202, 0.1);
  --char-tag-border: rgba(67, 56, 202, 0.3);
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Header */
.reader-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
}

.book-title-header {
  font-family: var(--font-family-heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-color);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60%;
  text-align: center;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.icon-btn:hover {
  background-color: var(--border-color);
}

/* Progress Bar */
.progress-bar-container {
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: transparent;
  z-index: 101;
}

.progress-bar-fill {
  height: 100%;
  width: 15%;
  background: linear-gradient(90deg, var(--accent-color), #818cf8);
  transition: width 0.2s ease;
}

/* Main Container */
.reader-container {
  margin-top: 60px;
  padding: 24px 20px 40px;
  max-width: 720px;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  flex: 1;
}

.manuscript-viewport {
  margin-bottom: 40px;
}

.chapter-title {
  font-family: var(--font-family-heading);
  font-size: 26px;
  text-align: center;
  margin: 30px 0 40px;
  color: var(--text-color);
  line-height: 1.3;
}

p {
  margin-bottom: 1.5em;
  text-align: justify;
  hyphens: auto;
  text-indent: 1.5em;
}

p.chapter-opener-p {
  text-indent: 0;
}

p.chapter-opener-p::first-letter {
  font-family: var(--font-family-heading);
  font-size: 3.2em;
  float: left;
  line-height: 0.8;
  margin-right: 8px;
  margin-top: 4px;
  color: var(--accent-color);
}

.scene-break {
  text-align: center;
  letter-spacing: 0.5em;
  margin: 2em 0;
  color: var(--muted-color);
  font-weight: bold;
}

/* Character Mention Pill */
.character-mention {
  background-color: var(--char-tag-bg);
  border-bottom: 2px dashed var(--accent-color);
  padding: 0 4px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s;
}

.character-mention:hover {
  background-color: var(--border-color);
}

/* Footer Navigation */
.reader-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.nav-btn {
  background-color: var(--surface-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 10px 16px;
  border-radius: 8px;
  font-family: var(--font-family-ui);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

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

.chapter-indicator {
  font-family: var(--font-family-ui);
  font-size: 12px;
  color: var(--muted-color);
}

/* TOC Drawer */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 200;
}

.drawer-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.toc-drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  left: -300px;
  width: 280px;
  background-color: var(--surface-color);
  border-right: 1px solid var(--border-color);
  z-index: 201;
  transition: left 0.3s ease;
  display: flex;
  flex-direction: column;
}

.toc-drawer.open {
  left: 0;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-family-ui);
}

.drawer-header h2 {
  font-size: 16px;
  font-weight: 600;
}

.toc-nav {
  padding: 16px;
  overflow-y: auto;
  flex: 1;
}

.toc-item {
  display: block;
  padding: 12px;
  color: var(--text-color);
  text-decoration: none;
  border-radius: 8px;
  font-family: var(--font-family-ui);
  font-size: 14px;
  margin-bottom: 4px;
  transition: background 0.2s;
}

.toc-item:hover, .toc-item.active {
  background-color: var(--border-color);
  color: var(--accent-color);
  font-weight: 600;
}

/* Settings Panel */
.settings-panel {
  position: fixed;
  top: 64px;
  right: 16px;
  width: 280px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  z-index: 150;
  font-family: var(--font-family-ui);
}

.settings-panel.hidden {
  display: none;
}

.settings-panel h3 {
  font-size: 14px;
  margin-bottom: 14px;
  color: var(--muted-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 13px;
}

.theme-buttons {
  display: flex;
  gap: 4px;
}

.theme-btn {
  background: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}

.theme-btn.active {
  border-color: var(--accent-color);
  background-color: var(--accent-color);
  color: #fff;
}

.font-size-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.font-btn {
  background-color: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  cursor: pointer;
}

.font-select {
  background-color: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 300;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  max-width: 400px;
  width: 100%;
  position: relative;
  font-family: var(--font-family-ui);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 20px;
}

.char-role {
  color: var(--accent-color);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
}