/* ==========================================================================
   Renegade Reader - Core Reader Stylesheet (Desktop + Mobile Optimized)
   Responsive, ad-free layout with touch gestures, floating toolbar, & bottom sheet
   ========================================================================== */

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  font-size: var(--font-size);
  line-height: var(--line-height);
  transition: background-color var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
  overflow-x: hidden;
}

/* Reading Progress Bar */
#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-color);
  width: 0%;
  z-index: 1000;
  transition: width 0.1s linear;
}

/* Sticky Header */
.reader-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 10px 20px;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), background var(--transition);
}

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

.reader-header .header-left,
.reader-header .header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reader-header a.logo-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.reader-header a.logo-link:hover {
  color: var(--accent-color);
}

.logo-badge {
  font-size: 0.72rem;
  padding: 2px 7px;
  background: var(--bg-secondary);
  color: var(--accent-color);
  border: 1px solid var(--border-color);
  border-radius: 10px;
}

.icon-btn {
  background: var(--bg-secondary);
  color: var(--text-color);
  text-decoration: none;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 8px 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.9rem;
  min-height: 38px;
  touch-action: manipulation;
  transition: all var(--transition);
}

.icon-btn:hover, .icon-btn:active {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background: var(--bg-tertiary);
}

/* Chapter Jump Dropdown */
.chapter-jump-select {
  padding: 8px 12px;
  background: var(--bg-secondary);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.88rem;
  max-width: 180px;
  min-height: 38px;
  cursor: pointer;
  font-family: inherit;
  transition: border-color var(--transition);
}

.chapter-jump-select:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* Reader Container */
.reader-container {
  max-width: var(--reader-max-width);
  margin: 0 auto;
  padding: 40px 24px 90px 24px;
}

.chapter-title-area {
  margin-bottom: 36px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
}

.chapter-title-area h1 {
  font-size: 1.85em;
  margin: 0 0 12px 0;
  line-height: 1.35;
  color: var(--text-color);
  letter-spacing: 0.02em;
}

.chapter-meta-badge {
  font-size: 0.85em;
  color: var(--text-muted);
  display: inline-flex;
  gap: 16px;
  align-items: center;
}

.chapter-body {
  position: relative;
  word-wrap: break-word;
}

.chapter-body p {
  margin: 1.25em 0;
  text-align: justify;
  text-justify: inter-word;
}

/* Xianxia Cultivation Special Blocks */
.dao_window {
  margin: 24px 0;
  padding: 16px 20px;
  background: var(--card-bg);
  border-left: 4px solid var(--accent-color);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.dao_window_title {
  margin: 0 0 8px 0;
  color: var(--accent-color);
  font-size: 1.05em;
}

.dao_divine {
  margin: 20px 0;
  padding: 12px 18px;
  border-left: 3px solid #38bdf8;
  background: rgba(56, 189, 248, 0.06);
  font-style: italic;
}

.dao_mantra {
  margin: 20px 0;
  padding: 12px 18px;
  border-left: 3px solid #f59e0b;
  background: rgba(245, 158, 11, 0.06);
  font-weight: 600;
  letter-spacing: 0.03em;
}

.dao_slaughter {
  margin: 20px 0;
  padding: 12px 18px;
  border-left: 3px solid #ef4444;
  background: rgba(239, 68, 68, 0.08);
  font-weight: 600;
}

.dao_quote {
  margin: 20px 0;
  padding: 12px 18px;
  border-left: 3px solid #a855f7;
  background: rgba(168, 85, 247, 0.06);
}

.dao_note {
  margin: 16px 0;
  font-size: 0.9em;
  color: var(--text-muted);
  font-style: italic;
}

.dao_divider {
  border: 0;
  height: 1px;
  background: radial-gradient(circle, var(--accent-color) 0%, transparent 80%);
  margin: 32px 0;
}

/* In-Page Navigation Buttons */
.chapter-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin: 40px 0;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.chapter-nav-btn {
  flex: 1;
  text-align: center;
  text-decoration: none;
  background: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 14px 20px;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  touch-action: manipulation;
  transition: all var(--transition);
}

.chapter-nav-btn:hover, .chapter-nav-btn:active {
  background: var(--bg-secondary);
  border-color: var(--accent-color);
  color: var(--accent-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.chapter-nav-btn.disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: default;
}

.chapter-index-btn {
  flex: 0 0 auto;
}

/* Cultivator's Insights (Local Chapter Notes) */
.cultivator-notes-section {
  margin: 48px 0 20px 0;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.notes-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.notes-header h3 {
  margin: 0;
  font-size: 1.15rem;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.notes-textarea {
  width: 100%;
  min-height: 110px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-color);
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.5;
  padding: 12px;
  resize: vertical;
  margin-bottom: 12px;
  transition: border-color var(--transition);
}

.notes-textarea:focus {
  outline: none;
  border-color: var(--accent-color);
}

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

.notes-status {
  font-size: 0.85rem;
  color: var(--accent-color);
  align-self: center;
  margin-right: auto;
}

/* Chapter Discussions (Giscus Comments) */
.cultivator-comments-section {
  margin: 32px 0;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.comments-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 8px;
}

.comments-header h3 {
  margin: 0;
  font-size: 1.15rem;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.comments-badge {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.comments-redirect-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  padding: 5px 10px;
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  text-decoration: none;
  transition: all var(--transition);
}

.comments-redirect-btn:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  background: var(--card-bg);
}

.giscus-thread-container {
  min-height: 160px;
}

.giscus-skeleton {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 36px 16px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.giscus-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: giscus-spin 0.8s linear infinite;
}

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

/* Floating Mobile Quick-Navigation Bar (Bottom Pill) */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: max(16px, env(safe-area-inset-bottom, 16px));
  left: 50%;
  transform: translateX(-50%);
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 40px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45), 0 0 15px var(--accent-glow);
  z-index: 850;
  padding: 6px 10px;
  gap: 6px;
  align-items: center;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}

.mobile-bottom-bar.immersive-hidden {
  transform: translate(-50%, 150%);
  opacity: 0;
  pointer-events: none;
}

.m-bar-btn {
  background: transparent;
  color: var(--text-color);
  border: none;
  padding: 10px 14px;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  text-decoration: none;
  touch-action: manipulation;
  transition: all var(--transition);
}

.m-bar-btn:active, .m-bar-btn:hover {
  background: var(--card-bg);
  color: var(--accent-color);
  transform: scale(1.08);
}

.m-bar-btn.disabled {
  opacity: 0.3;
  pointer-events: none;
}

/* Chapters Sidebar Drawer (Left Off-Canvas) */
.chapters-drawer {
  position: fixed;
  top: 0;
  left: -400px;
  width: 380px;
  max-width: 90vw;
  height: 100%;
  background: var(--nav-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-right: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  box-shadow: 6px 0 28px rgba(0, 0, 0, 0.45);
  transition: left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  -webkit-overflow-scrolling: touch;
}

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

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

.chapters-drawer-header h2 {
  font-size: 1.1rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-color);
}

.drawer-search-wrapper {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  display: flex;
  align-items: center;
}

.drawer-search-icon {
  position: absolute;
  left: 30px;
  color: var(--text-muted);
  pointer-events: none;
}

.drawer-search-input {
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-color);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 9px 34px 9px 36px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.drawer-search-input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(160, 50, 50, 0.2);
}

.drawer-search-clear {
  position: absolute;
  right: 28px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: none;
  font-size: 14px;
}

.drawer-volumes-container {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px 24px 14px;
  -webkit-overflow-scrolling: touch;
}

/* Drawer Tab Switcher */
.drawer-tabs {
  position: sticky;
  top: -12px;
  z-index: 5;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  margin: -4px -4px 10px -4px;
  padding: 4px 4px 0 4px;
  border-bottom: 1px solid var(--border-color);
  gap: 6px;
}

.drawer-tab-btn {
  flex: 1;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 8px 12px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.drawer-tab-btn:hover {
  color: var(--text-color);
}

.drawer-tab-btn.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

.drawer-view-panel {
  display: flex;
  flex-direction: column;
}

/* Volume Section Divider in Chapters List */
.drawer-book-divider {
  padding: 10px 12px 6px 12px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--accent-color);
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border-color);
  margin-top: 10px;
  margin-bottom: 4px;
  border-radius: 4px;
}

.drawer-book-divider:first-child {
  margin-top: 0;
  border-top: none;
}

/* Volume Cards in Volumes View */
.drawer-volume-card {
  padding: 12px 14px;
  margin-bottom: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s, background 0.15s;
}

.drawer-volume-card:hover {
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.03);
  transform: translateX(2px);
}

.drawer-volume-card.active {
  border-color: var(--accent-color);
  background: rgba(160, 50, 50, 0.1);
}

.drawer-volume-title {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-color);
  margin-bottom: 4px;
}

.drawer-volume-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.drawer-ch-item {
  padding: 8px 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  transition: background 0.15s, color 0.15s;
  border-radius: 4px;
  margin: 1px 6px;
}

.drawer-ch-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-color);
}

.drawer-ch-item.active {
  background: var(--accent-color);
  color: #ffffff !important;
  font-weight: 600;
}

.drawer-ch-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.drawer-ch-num {
  font-family: monospace;
  font-size: 0.78rem;
  opacity: 0.75;
  flex-shrink: 0;
}

.drawer-empty-search {
  padding: 30px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Reader Settings Drawer (Desktop Modal + Mobile Bottom Sheet) */
.settings-drawer {
  position: fixed;
  top: 0;
  right: -380px;
  width: 360px;
  height: 100%;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-left: 1px solid var(--border-color);
  z-index: 1000;
  padding: 24px;
  overflow-y: auto;
  box-shadow: -6px 0 24px rgba(0, 0, 0, 0.4);
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1), bottom 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  -webkit-overflow-scrolling: touch;
}

.settings-drawer.open {
  right: 0;
}

.drawer-handle {
  display: none;
  width: 44px;
  height: 5px;
  background: var(--border-color);
  border-radius: 3px;
  margin: 0 auto 16px auto;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 14px;
  margin-bottom: 20px;
}

.drawer-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--accent-color);
}

.setting-group {
  margin-bottom: 22px;
}

.setting-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.theme-btn {
  padding: 10px 12px;
  font-size: 0.82rem;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  text-align: left;
  min-height: 42px;
  touch-action: manipulation;
  transition: all var(--transition);
}

.theme-btn:active {
  transform: scale(0.97);
}

.theme-btn.active {
  border-color: var(--accent-color);
  background: var(--card-bg);
  font-weight: bold;
  box-shadow: 0 0 8px var(--accent-glow);
}

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

.slider-container input[type="range"] {
  flex: 1;
  accent-color: var(--accent-color);
  height: 6px;
  border-radius: 3px;
  cursor: pointer;
}

select.font-select {
  width: 100%;
  padding: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  border-radius: var(--border-radius);
  font-size: 0.92rem;
  min-height: 44px;
  cursor: pointer;
  font-family: inherit;
}

/* Backdrop */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 950;
  display: none;
}

.drawer-backdrop.active {
  display: block;
}

/* Swipe Feedback Toast */
.swipe-hint {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  background: var(--nav-bg);
  border: 1px solid var(--accent-color);
  color: var(--text-color);
  padding: 12px 24px;
  border-radius: 24px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 16px var(--accent-glow);
  opacity: 0;
  pointer-events: none;
  z-index: 1200;
  transition: opacity 0.2s ease, transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.swipe-hint.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* ==========================================================================
   Mobile Responsive Rules (< 768px and < 640px)
   ========================================================================== */

@media (max-width: 768px) {
  .mobile-bottom-bar {
    display: flex;
  }
}

@media (max-width: 640px) {
  .reader-header {
    padding: 8px 12px;
  }

  .chapter-jump-select {
    max-width: 140px;
    font-size: 0.82rem;
    padding: 6px 8px;
  }

  .icon-btn .btn-text {
    display: none;
  }

  .icon-btn {
    padding: 8px 10px;
  }

  .reader-container {
    padding: 20px 16px 110px 16px;
  }

  .chapter-title-area {
    margin-bottom: 24px;
    padding-bottom: 18px;
  }

  .chapter-title-area h1 {
    font-size: 1.42rem;
    line-height: 1.35;
  }

  .chapter-meta-badge {
    flex-wrap: wrap;
    gap: 8px 12px;
    font-size: 0.8rem;
    justify-content: center;
  }

  .chapter-body p {
    text-align: left;
    hyphens: auto;
    -webkit-hyphens: auto;
    word-break: break-word;
    margin: 1.15em 0;
  }

  .chapter-nav-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .chapter-nav-btn {
    width: 100%;
    padding: 12px 14px;
    min-height: 48px;
    font-size: 0.95rem;
  }

  #nav-prev-btn { order: 1; }
  #nav-next-btn { order: 2; }
  #nav-home-btn { order: 3; }
  #nav-toc-btn { order: 4; }

  /* Bottom Sheet Drawer on Mobile */
  .settings-drawer {
    top: auto;
    bottom: -100%;
    right: 0;
    left: 0;
    width: 100%;
    max-height: 82vh;
    border-left: none;
    border-top: 1px solid var(--border-color);
    border-radius: 20px 20px 0 0;
    padding: 12px 20px max(24px, env(safe-area-inset-bottom, 24px)) 20px;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.5);
  }

  .settings-drawer.open {
    bottom: 0;
    right: 0;
  }

  .drawer-handle {
    display: block;
  }

  .theme-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
  }

  .cultivator-notes-section,
  .cultivator-comments-section {
    padding: 16px;
  }
}

@media (max-width: 420px) {
  .logo-text {
    display: none;
  }
  .chapter-jump-select {
    max-width: 115px;
  }
}