/**
 * 禪閱 ZenRead — Reading Room CSS
 */

/* ─── Body override ─── */
.reading-body {
  background-color: var(--color-bg);
  transition: background-color 0.6s ease;
}

.reading-body.sepia {
  background-color: #F5EFE0;
  --color-text: #432B15;
  --color-text-muted: #A0826D;
}

/* ─── Reading Toolbar ─── */
.reading-toolbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background-color: rgba(249,248,246,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: transform var(--transition-normal), background-color var(--transition-slow);
}

.dark .reading-toolbar {
  background-color: rgba(17,33,32,0.95);
}

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

.reading-toolbar-inner {
  max-width: 940px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-width: 0;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

.toolbar-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.toolbar-btn:hover {
  background-color: var(--color-surface-2);
  color: var(--color-text);
}

.toolbar-btn.bookmarked {
  color: var(--color-primary);
}

.toolbar-title {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.toolbar-book-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.toolbar-chapter {
  font-size: 11px;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ─── Progress Bar ─── */
.reading-progress-bar {
  height: 2px;
  background-color: var(--color-border-light);
  position: relative;
}

.reading-progress-fill {
  height: 100%;
  background-color: var(--color-primary);
  width: 0%;
  transition: width 0.1s linear;
}

/* ─── Settings Panel ─── */
.settings-panel {
  position: fixed;
  top: 62px;
  right: var(--space-xl);
  z-index: var(--z-modal);
  width: 280px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.97);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.settings-panel.open {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0) scale(1);
}

.settings-panel-inner {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.settings-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.settings-label {
  font-size: 13px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.settings-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  min-width: 40px;
  text-align: center;
}

.font-size-controls {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.line-height-controls, .theme-controls {
  display: flex;
  gap: 4px;
}

.lh-btn {
  padding: 4px 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 11px;
  font-family: var(--font-ui);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lh-btn.active,
.lh-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-ultra);
}

.theme-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-btn.active,
.theme-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-ultra);
}

.settings-backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-modal) - 1);
  display: none;
}

.settings-backdrop.open {
  display: block;
}

/* ─── Reading Main ─── */
.reading-main {
  padding-top: 96px;
  padding-bottom: 120px;
  min-height: 100vh;
}

.reading-column {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ─── Chapter Header ─── */
.chapter-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-2xl);
}

.chapter-num {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.chapter-title {
  font-size: 28px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: var(--space-lg);
}

.chapter-divider {
  width: 40px;
  height: 1px;
  background-color: var(--color-primary);
  margin: 0 auto;
  opacity: 0.5;
}

/* ─── Reading Pages ─── */
.reading-page {
  margin-bottom: var(--space-2xl);
}

.reading-page p {
  font-family: var(--font-content);
  font-size: 18px;
  line-height: 1.9;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.02em;
  transition: font-size var(--transition-fast), line-height var(--transition-fast), color var(--transition-slow);
}

/* ─── Paywall Wall ─── */
.paywall-wall {
  position: relative;
  display: none;
  flex-direction: column;
  align-items: center;
  padding-top: 0;
}

.paywall-wall.show {
  display: flex;
}

.paywall-fade {
  position: absolute;
  top: -100px;
  left: -40px;
  right: -40px;
  height: 100px;
  background: linear-gradient(to bottom, transparent, var(--color-bg));
  pointer-events: none;
}

.paywall-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl) var(--space-2xl);
  text-align: center;
  box-shadow: var(--shadow-lg);
  max-width: 480px;
  width: 100%;
  margin: var(--space-2xl) 0;
}

.paywall-icon {
  margin-bottom: var(--space-lg);
}

.paywall-title {
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.paywall-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.paywall-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.paywall-cta {
  justify-content: center;
}

.paywall-sub {
  justify-content: center;
}

.paywall-note {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ─── Chapter Nav ─── */
.chapter-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 680px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-xl);
  border-top: 1px solid var(--color-border-light);
}

.chapter-btn {
  font-size: 13px;
  padding: 8px 16px;
}

.chapter-indicator {
  font-size: 13px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

/* ─── Toast ─── */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  opacity: 0;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  pointer-events: none;
  z-index: var(--z-toast);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── Hide toolbar on scroll ─── */