/* ==========================================================================
   TROILUS AND CRISEYDE — 21st Century Digital Edition
   Styles & Theme Engine
   ========================================================================== */

:root {
  /* Fonts */
  --font-display: 'Cinzel', serif;
  --font-poetry: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Theme: Vellum Light (Default) */
  --bg-primary: #FAF7F2;
  --bg-secondary: #F3ECE1;
  --bg-surface: #FFFFFF;
  --bg-surface-translucent: rgba(255, 255, 255, 0.82);
  --bg-elevated: #FFFFFF;
  
  --text-primary: #1C1917;
  --text-secondary: #57534E;
  --text-muted: #8C827A;
  
  --border-light: rgba(140, 130, 122, 0.18);
  --border-medium: rgba(140, 130, 122, 0.35);
  
  --accent-gold: #B45309;
  --accent-gold-light: #FEF3C7;
  --accent-gold-glow: rgba(180, 83, 9, 0.15);
  
  --accent-crimson: #991B1B;
  --accent-crimson-light: #FEE2E2;
  --accent-crimson-glow: rgba(153, 27, 27, 0.14);

  --gloss-underline: #D97706;
  --gloss-bg-hover: rgba(217, 119, 6, 0.12);
  --line-highlight: rgba(180, 83, 9, 0.05);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 14px -2px rgba(28, 25, 23, 0.08), 0 2px 6px -2px rgba(28, 25, 23, 0.04);
  --shadow-lg: 0 12px 32px -4px rgba(28, 25, 23, 0.14), 0 4px 12px -2px rgba(28, 25, 23, 0.06);
  --shadow-tooltip: 0 18px 45px -8px rgba(28, 25, 23, 0.22), 0 6px 16px -4px rgba(28, 25, 23, 0.1);

  --reader-max-width: 780px;
  --stanza-font-size: 20px;
  --stanza-line-height: 1.85;

  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-medium: 280ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 450ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Theme: Obsidian Dark */
[data-theme="dark"] {
  --bg-primary: #0F0E0D;
  --bg-secondary: #171614;
  --bg-surface: #1E1C1A;
  --bg-surface-translucent: rgba(26, 24, 22, 0.85);
  --bg-elevated: #262320;

  --text-primary: #F5F2EB;
  --text-secondary: #C4BEB4;
  --text-muted: #827C72;

  --border-light: rgba(255, 255, 255, 0.09);
  --border-medium: rgba(255, 255, 255, 0.18);

  --accent-gold: #F59E0B;
  --accent-gold-light: rgba(245, 158, 11, 0.18);
  --accent-gold-glow: rgba(245, 158, 11, 0.25);

  --accent-crimson: #EF4444;
  --accent-crimson-light: rgba(239, 68, 68, 0.18);
  --accent-crimson-glow: rgba(239, 68, 68, 0.25);

  --gloss-underline: #FBBF24;
  --gloss-bg-hover: rgba(251, 191, 36, 0.18);
  --line-highlight: rgba(245, 158, 11, 0.08);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px -2px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 14px 38px -4px rgba(0, 0, 0, 0.8);
  --shadow-tooltip: 0 20px 50px -6px rgba(0, 0, 0, 0.9);
}

/* Theme: Sepia Amber */
[data-theme="sepia"] {
  --bg-primary: #F4EEDC;
  --bg-secondary: #EBE2CC;
  --bg-surface: #F9F5EC;
  --bg-surface-translucent: rgba(249, 245, 236, 0.85);
  --bg-elevated: #FFFFFF;

  --text-primary: #2C2216;
  --text-secondary: #63503B;
  --text-muted: #96836E;

  --border-light: rgba(99, 80, 59, 0.15);
  --border-medium: rgba(99, 80, 59, 0.3);

  --accent-gold: #A15C07;
  --accent-gold-light: rgba(161, 92, 7, 0.15);
  --accent-crimson: #8C2219;
  --accent-crimson-light: rgba(140, 34, 25, 0.15);

  --gloss-underline: #B45309;
  --gloss-bg-hover: rgba(180, 83, 9, 0.12);
  --line-highlight: rgba(161, 92, 7, 0.06);
}

/* Font Size Modifiers */
[data-fontsize="large"] {
  --stanza-font-size: 23px;
  --stanza-line-height: 1.9;
}
[data-fontsize="xlarge"] {
  --stanza-font-size: 26px;
  --stanza-line-height: 1.95;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  transition: background-color var(--transition-medium), color var(--transition-medium);
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg-surface-translucent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-medium);
}

.reading-progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-gold), var(--accent-crimson));
  transition: width 80ms ease-out;
  z-index: 60;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.brand-emblem {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-crimson), #5A0E0E);
  color: #FFF;
  box-shadow: 0 4px 12px var(--accent-crimson-glow);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast);
}

.brand-emblem:hover {
  transform: rotate(6deg) scale(1.05);
}

.brand-emblem svg {
  width: 22px;
  height: 22px;
  transition: transform var(--transition-slow);
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Book Selector Pills */
.book-nav-tabs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-secondary);
  padding: 0.25rem;
  border-radius: 100px;
  border: 1px solid var(--border-light);
}

.book-tab-btn {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.85rem;
  border-radius: 100px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.book-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.04);
}

.book-tab-btn.active {
  background: var(--bg-elevated);
  color: var(--accent-crimson);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .book-tab-btn.active {
  color: var(--accent-gold);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.icon-btn {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.icon-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  background: var(--bg-secondary);
  transform: translateY(-1px);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

.search-trigger-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.85rem;
  border-radius: 9px;
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-trigger-btn:hover {
  border-color: var(--border-medium);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.search-trigger-btn kbd {
  font-size: 0.7rem;
  font-family: var(--font-sans);
  padding: 0.15rem 0.4rem;
  border-radius: 5px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
}

.classic-badge-btn {
  font-size: 0.72rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  background: var(--bg-secondary);
  color: var(--text-muted);
  border: 1px dashed var(--border-medium);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.classic-badge-btn:hover {
  color: var(--text-primary);
  border-style: solid;
  border-color: var(--accent-gold);
}

/* ==========================================================================
   Main Reader Container & Layout
   ========================================================================== */

.app-main {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  position: relative;
}

.reader-column {
  flex: 1;
  min-width: 0;
  padding: 2.5rem 1.5rem 6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.reader-content {
  width: 100%;
  max-width: var(--reader-max-width);
}

/* Section Header Banner */
.section-banner {
  margin-bottom: 2.5rem;
  text-align: center;
  position: relative;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-light);
}

.section-meta-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
}

.meta-pill {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
  background: var(--accent-gold-light);
  color: var(--accent-gold);
}

.meta-lines {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.section-author-credit {
  font-family: var(--font-poetry);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text-muted);
}

/* ==========================================================================
   Stanza & Verse Formatting (Rhyme Royal)
   ========================================================================== */

.stanzas-container {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

.stanza-card {
  position: relative;
  padding: 1.25rem 1.5rem 1.25rem 3.5rem;
  border-radius: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-medium);
  opacity: 0;
  transform: translateY(16px);
  animation: stanzaFadeUp 0.45s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes stanzaFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stanza-card:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-md);
}

.stanza-badge {
  position: absolute;
  top: 1rem;
  left: 0.75rem;
  font-size: 0.7rem;
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  letter-spacing: 0.04em;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.stanza-card:hover .stanza-badge {
  opacity: 1;
  color: var(--accent-gold);
}

.verse-lines-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.verse-line {
  display: flex;
  align-items: baseline;
  position: relative;
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
  margin: -0.15rem -0.5rem;
  transition: background-color var(--transition-fast);
}

.verse-line:hover {
  background-color: var(--line-highlight);
}

.line-number-gutter {
  position: absolute;
  left: -2.75rem;
  width: 2.2rem;
  text-align: right;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  user-select: none;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.verse-line:hover .line-number-gutter {
  opacity: 1;
  color: var(--accent-gold);
}

.verse-text {
  font-family: var(--font-poetry);
  font-size: var(--stanza-font-size);
  line-height: var(--stanza-line-height);
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

/* Drop Cap on Opening Stanza */
.stanza-card.first-stanza .verse-line:first-child .verse-text::first-letter {
  font-family: var(--font-display);
  float: left;
  font-size: 3.8rem;
  line-height: 0.8;
  margin-top: 0.2rem;
  margin-right: 0.65rem;
  color: var(--accent-crimson);
  font-weight: 700;
  text-shadow: 2px 2px 0 var(--accent-gold-light);
}

/* ==========================================================================
   Glossary Words & Popover Tooltips
   ========================================================================== */

.gloss-word {
  position: relative;
  color: inherit;
  font-weight: 500;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-color: var(--gloss-underline);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 4px;
  cursor: help;
  border-radius: 3px;
  padding: 0.05rem 0.2rem;
  margin: -0.05rem -0.2rem;
  transition: all var(--transition-fast);
}

.gloss-word:hover, .gloss-word.active-gloss {
  background-color: var(--gloss-bg-hover);
  color: var(--accent-crimson);
  text-decoration-style: solid;
  text-decoration-thickness: 2px;
}

[data-theme="dark"] .gloss-word:hover, [data-theme="dark"] .gloss-word.active-gloss {
  color: var(--accent-gold);
}

/* Floating Tooltip */
.gloss-tooltip {
  position: fixed;
  z-index: 1000;
  width: 290px;
  background: var(--bg-surface-translucent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border-medium);
  border-radius: 14px;
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow-tooltip);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(6px) scale(0.96);
  transition: opacity 0.18s cubic-bezier(0.16, 1, 0.3, 1), transform 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  display: none;
}

.gloss-tooltip.visible {
  display: block;
  opacity: 1;
  transform: translateY(0) scale(1);
}

.tooltip-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 0.45rem;
}

.tooltip-word {
  font-family: var(--font-poetry);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-crimson);
}

[data-theme="dark"] .tooltip-word {
  color: var(--accent-gold);
}

.tooltip-pos {
  font-size: 0.72rem;
  font-style: italic;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.tooltip-definition {
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.tooltip-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.tooltip-lexicon-btn {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-gold);
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: color var(--transition-fast);
}

.tooltip-lexicon-btn:hover {
  color: var(--accent-crimson);
  text-decoration: underline;
}

/* ==========================================================================
   Section Footer Navigation (Prev / Next)
   ========================================================================== */

.section-navigation-footer {
  width: 100%;
  max-width: var(--reader-max-width);
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.nav-card {
  display: flex;
  flex-direction: column;
  padding: 1.2rem 1.4rem;
  border-radius: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-card:hover {
  border-color: var(--accent-gold);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.nav-card.prev-card {
  text-align: left;
}

.nav-card.next-card {
  text-align: right;
  margin-left: auto;
  width: 100%;
}

.nav-card-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-gold);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-card.next-card .nav-card-label {
  justify-content: flex-end;
}

.nav-card-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.nav-card-lines {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Slide-Over Drawers (TOC, Glossary, About)
   ========================================================================== */

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-medium);
}

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

.drawer-panel {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 100%;
  max-width: 440px;
  background: var(--bg-surface);
  box-shadow: var(--shadow-lg);
  z-index: 110;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-slow);
}

.drawer-left {
  left: 0;
  border-right: 1px solid var(--border-light);
  transform: translateX(-100%);
}

.drawer-right {
  right: 0;
  border-left: 1px solid var(--border-light);
  transform: translateX(100%);
}

.drawer-panel.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface-translucent);
}

.drawer-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.drawer-close-btn {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--border-light);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.drawer-close-btn:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1.5rem;
}

/* TOC Drawer Specifics */
.toc-book-group {
  margin-bottom: 1.5rem;
}

.toc-book-header {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.45rem 0;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-light);
}

.toc-sections-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.toc-section-item {
  padding: 0.6rem 0.85rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.35;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.toc-section-item:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.toc-section-item.active {
  background: var(--accent-gold-light);
  color: var(--accent-gold);
  font-weight: 600;
  border-color: rgba(180, 83, 9, 0.2);
}

.toc-item-lines {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Glossary Drawer Specifics */
.glossary-search-box {
  margin-bottom: 1rem;
  position: relative;
}

.glossary-search-input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.4rem;
  border-radius: 9px;
  border: 1px solid var(--border-medium);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.glossary-search-input:focus {
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px var(--accent-gold-glow);
}

.glossary-search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.alphabet-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-light);
}

.alpha-btn {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  border: none;
  background: var(--bg-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.alpha-btn:hover, .alpha-btn.active {
  background: var(--accent-gold);
  color: #FFF;
}

.glossary-cards-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.glossary-card {
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

.glossary-card:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.gloss-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}

.gloss-card-word {
  font-family: var(--font-poetry);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-crimson);
}

[data-theme="dark"] .gloss-card-word {
  color: var(--accent-gold);
}

.gloss-card-def {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   Cmd+K Spotlight Search Modal
   ========================================================================== */

.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: grid;
  place-items: start center;
  padding-top: 10vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-medium);
}

.search-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.search-modal {
  width: 90%;
  max-width: 620px;
  max-height: 75vh;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: 16px;
  box-shadow: var(--shadow-tooltip);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.96) translateY(-8px);
  transition: transform var(--transition-medium);
}

.search-modal-backdrop.open .search-modal {
  transform: scale(1) translateY(0);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
}

.search-modal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 1.15rem;
  color: var(--text-primary);
}

.search-results-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.search-result-item {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-result-item:hover, .search-result-item.highlighted {
  background: var(--bg-secondary);
}

.search-item-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-gold);
}

.search-item-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.search-item-snippet {
  font-family: var(--font-poetry);
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  padding: 0.65rem 1.15rem;
  border-radius: 100px;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(12px) scale(0.94);
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toastIn {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ==========================================================================
   Facing-Page (Parallel Translation) Mode & Header Controls
   ========================================================================== */

.facing-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.42rem 0.85rem;
  border-radius: 9px;
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.facing-toggle-btn:hover {
  border-color: var(--accent-gold);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.facing-toggle-btn.active {
  border-color: var(--accent-gold);
  background: var(--accent-gold-light);
  color: var(--text-primary);
}

[data-theme="dark"] .facing-toggle-btn.active {
  background: rgba(245, 158, 11, 0.22);
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.facing-pill {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.45rem;
  border-radius: 100px;
  background: var(--bg-secondary);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.facing-toggle-btn.active .facing-pill {
  background: var(--accent-gold);
  color: #ffffff;
}

[data-theme="dark"] .facing-toggle-btn.active .facing-pill {
  color: #12100e;
}

.nav-about-btn {
  display: flex;
  align-items: center;
  padding: 0.42rem 0.85rem;
  border-radius: 9px;
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-about-btn:hover {
  border-color: var(--border-medium);
  color: var(--accent-crimson);
  background: var(--bg-secondary);
  transform: translateY(-1px);
}

[data-theme="dark"] .nav-about-btn:hover {
  color: var(--accent-gold);
}

/* Switch Component for Drawer */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--border-medium);
  transition: 0.25s;
  border-radius: 24px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.25s;
  border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
  background-color: var(--accent-gold);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(20px);
}

/* Facing Translation Grid & Stanza Columns */
body.facing-mode-active {
  --reader-max-width: 1380px;
}

.reader-content {
  transition: max-width var(--transition-medium);
}

.stanza-columns-grid {
  display: block;
}

.stanza-col-trans {
  display: none;
}

.col-language-label {
  display: none;
}

body.facing-mode-active .stanza-card {
  padding-right: 2rem;
}

body.facing-mode-active .stanza-columns-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.75rem;
  position: relative;
}

body.facing-mode-active .col-language-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-light);
}

.col-language-label .badge-lang {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-gold);
}

.col-language-label .badge-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-style: italic;
}

body.facing-mode-active .stanza-col-trans {
  display: block;
  position: relative;
  padding-left: 2rem;
  border-left: 1px dashed var(--border-medium);
}

.trans-lines-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.trans-gutter {
  color: var(--text-muted);
  opacity: 0.45;
}

.trans-text {
  font-family: var(--font-poetry);
  font-size: var(--stanza-font-size);
  line-height: var(--stanza-line-height);
  color: var(--text-secondary);
  font-style: normal;
}

/* Bidirectional Synchronized Line Hover */
.verse-line.line-synced-hover {
  background-color: var(--line-highlight);
  box-shadow: 0 0 0 2px var(--accent-gold-glow);
  color: var(--text-primary);
  border-radius: 6px;
}

.verse-line.line-synced-hover .trans-text {
  color: var(--text-primary);
}

.verse-line.line-synced-hover .line-number-gutter {
  opacity: 1;
  color: var(--accent-gold);
}

/* ==========================================================================
   Original Librarius Footer (Authentic Tribute & Credit)
   ========================================================================== */

.original-site-footer {
  margin-top: 3.5rem;
  padding-top: 1rem;
  padding-bottom: 2.5rem;
  width: 100%;
}

.original-footer-rule {
  width: 100%;
  height: 4px;
  background: var(--border-medium);
  margin-bottom: 1.5rem;
  border-radius: 2px;
}

.original-footer-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.original-footer-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.original-back-to-top {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--text-secondary);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.original-back-to-top:hover {
  transform: translateY(-3px);
  color: var(--accent-gold);
}

.original-arrow-img {
  image-rendering: pixelated;
  margin-bottom: 0.25rem;
  display: block;
}

.original-back-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.original-footer-center {
  text-align: center;
  flex: 1;
  min-width: 220px;
}

.original-division-credit {
  font-family: var(--font-poetry);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.original-footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  gap: 0.35rem;
}

.original-logo-link {
  display: inline-block;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.original-logo-link:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

.original-logo-img {
  display: block;
  image-rendering: auto;
  border-radius: 4px;
  background: #ffffff;
  padding: 2px;
  border: 1px solid var(--border-light);
}

.original-copyright-text {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.original-brand-name {
  color: #000080; /* Classic Navy from original font color="navy" */
  font-weight: 700;
  font-size: 0.88rem;
}

[data-theme="dark"] .original-brand-name {
  color: #93c5fd; /* Soft luminous blue in dark mode */
}

[data-theme="sepia"] .original-brand-name {
  color: #1e3a8a;
}

.original-editor-credit,
.original-coeditor-credit {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.original-editor-credit strong,
.original-coeditor-credit strong {
  color: var(--text-primary);
}

.original-modern-editor-credit {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.45rem;
}

.original-modern-editor-credit strong {
  color: var(--text-primary);
}

.original-modern-editor-credit a {
  color: var(--accent-gold);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.original-modern-credit {
  display: block;
  margin-top: 0.35rem;
  padding-top: 0.35rem;
  border-top: 1px dashed var(--border-medium);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.original-modern-credit strong {
  color: var(--text-primary);
}

/* Canto Reading Footnote */
.canto-footnote {
  margin-top: 2rem;
  margin-bottom: 2rem;
  padding: 0.85rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.canto-footnote em {
  font-family: var(--font-poetry);
  font-size: 0.95rem;
}

.canto-footnote strong {
  color: var(--text-primary);
  font-weight: 600;
}

.canto-footnote a {
  color: var(--accent-gold);
  text-decoration: none;
  font-weight: 600;
}

.canto-footnote a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

@media (max-width: 900px) {
  .book-nav-tabs {
    display: none;
  }
  .search-trigger-btn kbd {
    display: none;
  }
  .reader-column {
    padding: 1.5rem 1rem 5rem;
  }
  .stanza-card {
    padding-left: 2.75rem;
  }
  .line-number-gutter {
    left: -2.25rem;
    font-size: 0.68rem;
  }
  .section-title {
    font-size: 1.6rem;
  }
}

@media (max-width: 640px) {
  .section-navigation-footer {
    grid-template-columns: 1fr;
  }
  .brand-subtitle {
    display: none;
  }
  .classic-badge-btn {
    display: none;
  }
}