/* ==========================================================================
   NOVELXA V2 - ULTRA LIGHTWEIGHT MOBILE-FIRST NOVEL READER
   Zero Bloat | 60 FPS Smooth | AMOLED & Eye Comfort Modes | Responsive
   STRICT READER ISOLATION: Design tokens in this file are completely
   independent from website themes (White Modern UI) and NEVER leak.
   ========================================================================== */

:root {
  /* Default: Night Dark Theme */
  --reader-bg: #0c0e14;
  --reader-card-bg: rgba(22, 26, 35, 0.7);
  --reader-border: rgba(255, 255, 255, 0.08);
  --reader-text: #e2e8f0;
  --reader-muted: #94a3b8;
  --reader-primary: #ff6b35;
  --reader-primary-hover: #ff5714;
  --reader-bar-bg: rgba(12, 14, 20, 0.94);
  --reader-sheet-bg: #12151e;
  --reader-btn-bg: rgba(255, 255, 255, 0.06);
  --reader-btn-border: rgba(255, 255, 255, 0.12);
  --reader-item-hover: rgba(255, 255, 255, 0.04);
  
  /* Configurable Typography Defaults */
  --reader-fs: 17.5px;
  --reader-lh: 1.85;
  --reader-ff: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* 1. OLED Pure Black Theme (AMOLED battery saver) */
body.reader-page-body.theme-oled,
body.theme-oled {
  --reader-bg: #000000;
  --reader-card-bg: #09090b;
  --reader-border: rgba(255, 255, 255, 0.1);
  --reader-text: #e5e7eb;
  --reader-muted: #71717a;
  --reader-bar-bg: rgba(0, 0, 0, 0.96);
  --reader-sheet-bg: #09090b;
  --reader-btn-bg: #18181b;
  --reader-btn-border: #27272a;
  --reader-item-hover: #18181b;
  background-color: #000000 !important;
  color: #e5e7eb !important;
}

/* 2. Night Theme (Default Deep Charcoal) */
body.reader-page-body.theme-night,
body.theme-night {
  --reader-bg: #0c0e14;
  --reader-card-bg: rgba(22, 26, 35, 0.7);
  --reader-border: rgba(255, 255, 255, 0.08);
  --reader-text: #e2e8f0;
  --reader-muted: #94a3b8;
  --reader-bar-bg: rgba(12, 14, 20, 0.94);
  --reader-sheet-bg: #12151e;
  --reader-btn-bg: rgba(255, 255, 255, 0.06);
  --reader-btn-border: rgba(255, 255, 255, 0.12);
  --reader-item-hover: rgba(255, 255, 255, 0.04);
  background-color: #0c0e14 !important;
  color: #e2e8f0 !important;
}

/* 3. Warm Sepia Theme (Ultra comfort for prolonged reading) */
body.reader-page-body.theme-sepia,
body.theme-sepia {
  --reader-bg: #1d1915;
  --reader-card-bg: #26211c;
  --reader-border: rgba(224, 213, 193, 0.1);
  --reader-text: #f0e6d6;
  --reader-muted: #b4a594;
  --reader-bar-bg: rgba(29, 25, 21, 0.95);
  --reader-sheet-bg: #26211c;
  --reader-btn-bg: rgba(224, 213, 193, 0.07);
  --reader-btn-border: rgba(224, 213, 193, 0.15);
  --reader-item-hover: rgba(224, 213, 193, 0.05);
  background-color: #1d1915 !important;
  color: #f0e6d6 !important;
}

/* 4. Daylight White Theme */
body.reader-page-body.theme-light,
body.theme-light {
  --reader-bg: #f8f7f2;
  --reader-card-bg: #ffffff;
  --reader-border: rgba(0, 0, 0, 0.09);
  --reader-text: #1f2937;
  --reader-muted: #64748b;
  --reader-bar-bg: rgba(248, 247, 242, 0.96);
  --reader-sheet-bg: #ffffff;
  --reader-btn-bg: #f1f0ea;
  --reader-btn-border: rgba(0, 0, 0, 0.12);
  --reader-item-hover: #f1f0ea;
  background-color: #f8f7f2 !important;
  color: #1f2937 !important;
}

/* Page Base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

.reader-page-body {
  background-color: var(--reader-bg);
  color: var(--reader-text);
  font-family: var(--reader-ff);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  transition: background-color 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  text-rendering: optimizeLegibility;
}

/* Top Progress Indicator */
.reader-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, #ff6b35, #ff9248);
  z-index: 1002;
  transition: width 0.12s linear;
  pointer-events: none;
}

/* Reader Top Bar */
.reader-top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 950;
  height: calc(56px + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  background: var(--reader-bar-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--reader-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: 14px;
  padding-right: 14px;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  will-change: transform;
}

.reader-top-bar.bar-hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

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

.btn-reader-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--reader-btn-border);
  background: var(--reader-btn-bg);
  color: var(--reader-text);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn-reader-circle:active {
  transform: scale(0.92);
}

.reader-header-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.reader-novel-name {
  font-size: 11px;
  font-weight: 700;
  color: var(--reader-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reader-ch-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--reader-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

.reader-top-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.reader-icon-btn {
  height: 36px;
  padding: 0 10px;
  border-radius: 9999px;
  border: 1px solid var(--reader-btn-border);
  background: var(--reader-btn-bg);
  color: var(--reader-text);
  font-size: 12.5px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.reader-icon-btn:active {
  transform: scale(0.94);
}

.reader-icon-btn i {
  width: 16px;
  height: 16px;
}

/* Reader Reading Area */
.reader-wrapper {
  max-width: 720px;
  margin: 0 auto;
  padding: calc(76px + env(safe-area-inset-top, 0px)) 20px calc(110px + env(safe-area-inset-bottom, 0px)) 20px;
}

/* Chapter Heading inside content */
.reader-ch-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px dashed var(--reader-border);
}

.reader-badge-wrap {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.reader-chapter-badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 6px;
  background: rgba(255, 107, 53, 0.12);
  color: var(--reader-primary);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.reader-meta-dot {
  color: var(--reader-muted);
  font-size: 10px;
}

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

.reader-main-title {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--reader-text);
  letter-spacing: -0.01em;
}

/* Article Content Text */
.reader-content-text {
  font-size: var(--reader-fs, 17.5px);
  line-height: var(--reader-lh, 1.85);
  font-family: var(--reader-ff);
  color: var(--reader-text);
  letter-spacing: 0.008em;
  user-select: text;
  -webkit-user-select: text;
}

.reader-content-text p {
  margin-top: 0;
  margin-bottom: 1.45em;
  text-align: left;
  word-break: break-word;
  hyphens: auto;
}

/* End Card */
.reader-chapter-end-card {
  margin-top: 48px;
  padding: 24px 20px;
  border-radius: 16px;
  border: 1px solid var(--reader-border);
  background: var(--reader-card-bg);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.end-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.12);
  color: var(--reader-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.end-card-icon i {
  width: 22px;
  height: 22px;
}

.reader-chapter-end-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--reader-text);
}

.end-card-novel-title {
  margin: 0;
  font-size: 13px;
  color: var(--reader-muted);
}

.end-card-actions {
  margin-top: 6px;
  width: 100%;
  max-width: 280px;
}

.btn-end-next {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 20px;
  border-radius: 9999px;
  background: linear-gradient(135deg, #ff6b35, #ff8c42);
  color: #fff;
  font-size: 13.5px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
  transition: transform 0.15s ease, opacity 0.15s ease;
}

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

/* Bottom Navigation Bar */
.reader-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 950;
  padding-top: 10px;
  padding-bottom: max(12px, env(safe-area-inset-bottom, 12px));
  padding-left: 14px;
  padding-right: 14px;
  background: var(--reader-bar-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-top: 1px solid var(--reader-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  will-change: transform;
}

.reader-bottom-nav.bar-hidden {
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
}

.reader-bottom-nav-btn {
  height: 40px;
  padding: 0 14px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.15s ease, transform 0.1s ease;
}

.reader-bottom-nav-btn:active {
  transform: scale(0.95);
}

.btn-nav-prev {
  background: var(--reader-btn-bg);
  border: 1px solid var(--reader-btn-border);
  color: var(--reader-text);
}

.btn-nav-next {
  background: linear-gradient(135deg, #ff6b35, #ff8c42);
  border: none;
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.3);
}

.btn-nav-disabled {
  background: transparent;
  border: 1px solid transparent;
  color: var(--reader-muted);
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.reader-chapter-trigger-btn {
  height: 40px;
  padding: 0 14px;
  border-radius: 9999px;
  background: var(--reader-btn-bg);
  border: 1px solid var(--reader-btn-border);
  color: var(--reader-text);
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.reader-chapter-trigger-btn:active {
  transform: scale(0.96);
}

.reader-chapter-trigger-btn .ch-divider {
  color: var(--reader-muted);
  font-weight: 400;
}

.reader-chapter-trigger-btn .trigger-chevron {
  width: 14px;
  height: 14px;
  color: var(--reader-muted);
  margin-left: 2px;
}

/* ==========================================================================
   BOTTOM SHEETS / DRAWERS (MODALS)
   ========================================================================== */

.reader-sheet-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.reader-sheet-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.reader-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-width: 580px;
  margin: 0 auto;
  max-height: 85vh;
  background: var(--reader-sheet-bg);
  border-top: 1px solid var(--reader-border);
  border-left: 1px solid var(--reader-border);
  border-right: 1px solid var(--reader-border);
  border-top-left-radius: 22px;
  border-top-right-radius: 22px;
  z-index: 1001;
  transform: translateY(100%);
  pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
  display: flex;
  flex-direction: column;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.55);
  padding-bottom: env(safe-area-inset-bottom, 14px);
}

.reader-sheet.active {
  transform: translateY(0);
  pointer-events: auto;
}

/* Desktop & Tablet Centered Modal Popup (Optimal Eye Level) */
@media (min-width: 640px) {
  .reader-sheet {
    top: 50%;
    bottom: auto;
    left: 50%;
    right: auto;
    margin: 0;
    width: 92vw;
    max-width: 520px;
    max-height: 78vh;
    border: 1px solid var(--reader-border);
    border-radius: 22px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7), 0 0 1px rgba(255, 255, 255, 0.15);
    transform: translate(-50%, -46%) scale(0.96);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
    padding-bottom: 12px;
  }

  .reader-sheet.active {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    pointer-events: auto;
  }

  .sheet-handle-bar {
    display: none;
  }
}

.sheet-handle-bar {
  width: 36px;
  height: 4px;
  background: var(--reader-border);
  border-radius: 2px;
  margin: 10px auto 4px auto;
  flex-shrink: 0;
}

.sheet-header {
  padding: 10px 18px 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--reader-border);
  flex-shrink: 0;
}

.sheet-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--reader-text);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sheet-close-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--reader-btn-bg);
  color: var(--reader-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.sheet-body {
  flex: 1;
  min-height: 0;
  padding: 16px 20px 20px 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.sheet-body::-webkit-scrollbar {
  width: 6px;
}

.sheet-body::-webkit-scrollbar-track {
  background: transparent;
}

.sheet-body::-webkit-scrollbar-thumb {
  background: var(--reader-border);
  border-radius: 10px;
}

.sheet-body::-webkit-scrollbar-thumb:hover {
  background: var(--reader-muted);
}

/* Settings Form Controls */
.setting-group {
  margin-bottom: 20px;
}

.setting-group:last-child {
  margin-bottom: 8px;
}

.setting-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--reader-muted);
  margin-bottom: 10px;
  display: block;
}

/* Font Size Stepper */
.size-stepper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--reader-btn-bg);
  border: 1px solid var(--reader-btn-border);
  border-radius: 12px;
  padding: 6px 10px;
}

.stepper-btn {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--reader-btn-border);
  background: var(--reader-sheet-bg);
  color: var(--reader-text);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.1s ease;
}

.stepper-btn:active {
  transform: scale(0.92);
}

.stepper-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--reader-text);
}

/* Button Grids for Font & Line Height */
.options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.option-chip {
  padding: 10px 8px;
  border-radius: 10px;
  border: 1px solid var(--reader-btn-border);
  background: var(--reader-btn-bg);
  color: var(--reader-muted);
  font-size: 12.5px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.option-chip:active {
  transform: scale(0.96);
}

.option-chip.active {
  background: rgba(255, 107, 53, 0.14);
  border-color: var(--reader-primary);
  color: var(--reader-primary);
  font-weight: 700;
}

/* Theme Swatches Grid */
.themes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.theme-card {
  padding: 10px 6px;
  border-radius: 10px;
  border: 2px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  transition: all 0.15s ease;
}

.theme-card.active {
  border-color: var(--reader-primary);
  box-shadow: 0 0 0 1px var(--reader-primary);
}

.theme-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.theme-card[data-theme="oled"] .theme-dot {
  background: #000000;
}
.theme-card[data-theme="oled"] {
  background: #111111;
  color: #d4d4d8;
}

.theme-card[data-theme="night"] .theme-dot {
  background: #0c0e14;
}
.theme-card[data-theme="night"] {
  background: #151821;
  color: #e2e8f0;
}

.theme-card[data-theme="sepia"] .theme-dot {
  background: #231e19;
}
.theme-card[data-theme="sepia"] {
  background: #2b251f;
  color: #f0e6d6;
}

.theme-card[data-theme="light"] .theme-dot {
  background: #ffffff;
  border: 1px solid #d1d5db;
}
.theme-card[data-theme="light"] {
  background: #e5e5dc;
  color: #1f2937;
}

/* Chapter List Drawer */
.chapter-list-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chapter-item-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 10px;
  text-decoration: none;
  color: var(--reader-text);
  font-size: 13.5px;
  transition: background 0.12s ease;
}

.chapter-item-link:hover, .chapter-item-link:active {
  background: var(--reader-item-hover);
}

.chapter-item-link.current-active {
  background: rgba(255, 107, 53, 0.14);
  color: var(--reader-primary);
  font-weight: 700;
  border: 1px solid rgba(255, 107, 53, 0.3);
}

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

.chapter-num-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--reader-btn-bg);
  color: var(--reader-muted);
  flex-shrink: 0;
}

.chapter-item-link.current-active .chapter-num-badge {
  background: var(--reader-primary);
  color: #fff;
}

.chapter-item-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chapter-active-label {
  font-size: 10.5px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--reader-primary);
  color: #fff;
  flex-shrink: 0;
}

/* ==========================================================================
   MOBILE MEDIA QUERIES (<= 600px)
   ========================================================================== */
@media (max-width: 600px) {
  .reader-wrapper {
    padding: calc(66px + env(safe-area-inset-top, 0px)) 16px calc(96px + env(safe-area-inset-bottom, 0px)) 16px;
  }

  .reader-main-title {
    font-size: 20px;
  }

  .reader-content-text {
    font-size: var(--reader-fs, 16.5px);
    line-height: var(--reader-lh, 1.8);
  }

  .reader-top-bar {
    padding-left: 10px;
    padding-right: 10px;
    height: calc(52px + env(safe-area-inset-top, 0px));
  }

  .reader-novel-name {
    max-width: 170px;
    font-size: 10px;
  }

  .reader-ch-title {
    max-width: 170px;
    font-size: 12px;
  }

  .reader-bottom-nav {
    padding-left: 10px;
    padding-right: 10px;
    padding-top: 8px;
    padding-bottom: max(10px, env(safe-area-inset-bottom, 10px));
  }

  .reader-bottom-nav-btn {
    height: 38px;
    padding: 0 10px;
    font-size: 12px;
  }

  .reader-chapter-trigger-btn {
    height: 38px;
    padding: 0 10px;
    font-size: 12px;
  }

  .themes-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
  }

  .theme-card {
    padding: 8px 4px;
    font-size: 10px;
  }

  .theme-dot {
    width: 20px;
    height: 20px;
  }
}