/* Character Catalog Browser, Category Tabs, and High-Contrast Character Grid */

.catalog-section {
  width: 100%;
  max-width: 1140px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(12px);
}

/* Section Header Toolbar & Search */
.catalog-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}

/* Category Tabs */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.cat-tab {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary) !important;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.cat-tab:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary) !important;
  border-color: var(--border-medium);
}

.cat-tab.active {
  background: var(--accent-primary) !important;
  border-color: var(--accent-primary) !important;
  color: #ffffff !important;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.cat-tab span.count {
  font-size: 11px;
  background: rgba(0, 0, 0, 0.25);
  color: #ffffff;
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

/* Search Bar */
.search-box {
  position: relative;
  min-width: 260px;
  flex: 1;
  max-width: 360px;
}

.search-box input {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 9px 14px 9px 36px;
  border-radius: var(--radius-full);
  font-size: 13px;
  outline: none;
  transition: all var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-glow);
}

.search-box .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  color: var(--text-muted);
  pointer-events: none;
}

/* Barakhadi Sub-Filter (Consonant Horizontal Bar) */
.barakhadi-consonant-bar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px 10px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
  -webkit-overflow-scrolling: touch;
}

.barakhadi-consonant-bar::-webkit-scrollbar {
  height: 5px;
}

.barakhadi-consonant-bar::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-full);
}

.barakhadi-consonant-bar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
}

.barakhadi-consonant-bar::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.consonant-chip {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: #ffffff !important; /* Explicit high-contrast white in dark mode */
  min-width: 38px;
  height: 38px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  font-family: 'Noto Sans Gujarati', sans-serif;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.consonant-chip:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff !important;
}

.consonant-chip.active {
  background: var(--blue-action) !important;
  border-color: var(--blue-action) !important;
  color: #ffffff !important;
  box-shadow: 0 2px 10px rgba(31, 111, 235, 0.5);
}

/* Character Button Grid (Fixed row height prevents vertical stretching) */
.char-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  grid-auto-rows: 76px;
  align-content: start;
  gap: 10px;
  max-height: 480px;
  overflow-y: auto;
  padding: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.char-grid::-webkit-scrollbar {
  width: 6px;
}

.char-grid::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
}

/* Character Button - High Contrast Pure White Glyphs & Consistent Height */
.char-btn {
  background: #141c28; /* Solid dark slate for crisp contrast */
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 8px 4px 6px;
  height: 76px;
  min-height: 76px;
  max-height: 76px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  color: #ffffff !important; /* Neutralize browser buttontext defaults */
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.char-btn:hover {
  background: #202c3e;
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.char-btn.active {
  background: var(--accent-primary) !important;
  border-color: var(--accent-primary) !important;
  color: #ffffff !important;
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-2px);
}

/* Gujarati Glyph Inside Button - Pure Crisp White */
.char-btn .char-glyph {
  font-family: 'Noto Sans Gujarati', sans-serif;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  color: #ffffff !important; /* Guaranteed pure white on dark background */
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7);
  transition: transform var(--transition-fast);
}

.char-btn:hover .char-glyph {
  transform: scale(1.08);
}

/* English / Transliteration Subtitle */
.char-btn .char-sub {
  font-size: 11px;
  font-weight: 500;
  color: #94a3b8 !important; /* High-contrast light slate grey */
  margin-top: 2px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  max-width: 58px;
  text-align: center;
}

.char-btn.active .char-glyph {
  color: #ffffff !important;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.char-btn.active .char-sub {
  color: rgba(255, 255, 255, 0.95) !important;
  font-weight: 600;
}

/* Sound Indicator on Button */
.char-btn .sound-indicator {
  position: absolute;
  top: 4px;
  right: 4px;
  font-size: 8px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.char-btn:hover .sound-indicator {
  opacity: 0.7;
}

.char-btn.active .sound-indicator {
  opacity: 1;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
  color: var(--text-muted);
  font-size: 14px;
  grid-column: 1 / -1;
}

.empty-state .icon {
  font-size: 32px;
  margin-bottom: 8px;
}

/* ==========================================================================
   Light Mode Contrast Overrides
   ========================================================================== */
[data-theme="light"] .char-btn {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  color: #0f172a !important;
}

[data-theme="light"] .char-btn:hover {
  background: #f1f5f9;
  border-color: rgba(0, 0, 0, 0.25);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .char-btn .char-glyph {
  color: #0f172a !important; /* Deep crisp black in light mode */
  text-shadow: none;
}

[data-theme="light"] .char-btn .char-sub {
  color: #475569 !important;
}

[data-theme="light"] .char-btn.active {
  background: var(--accent-primary) !important;
  border-color: var(--accent-primary) !important;
  color: #ffffff !important;
}

[data-theme="light"] .char-btn.active .char-glyph,
[data-theme="light"] .char-btn.active .char-sub {
  color: #ffffff !important;
}

[data-theme="light"] .consonant-chip {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.12);
  color: #0f172a !important;
}

[data-theme="light"] .consonant-chip:hover {
  background: #f1f5f9;
  color: #0f172a !important;
}

[data-theme="light"] .consonant-chip.active {
  background: var(--blue-action) !important;
  color: #ffffff !important;
}

[data-theme="light"] .char-grid::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
}

/* ==========================================================================
   Responsive Adaptations for Catalog Grid
   ========================================================================== */
@media (max-width: 768px) {
  .catalog-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .search-box {
    max-width: unset;
    min-width: unset;
    width: 100%;
  }

  .category-tabs {
    width: 100%;
  }

  .cat-tab {
    flex: 1;
    justify-content: center;
    padding: 8px 10px;
    font-size: 12px;
  }
}

@media (max-width: 640px) {
  .catalog-section {
    padding: 16px 12px;
  }

  .char-grid {
    grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
    grid-auto-rows: 68px;
    align-content: start;
    gap: 8px;
    max-height: 380px;
  }

  .char-btn {
    height: 68px;
    min-height: 68px;
    max-height: 68px;
    box-sizing: border-box;
    padding: 6px 2px 4px;
    border-radius: var(--radius-sm);
  }

  .char-btn .char-glyph {
    font-size: 20px;
  }

  .char-btn .char-sub {
    font-size: 10px;
    max-width: 48px;
  }
}