/* ============================================
   CATEGORIES PAGE - Modern Blue Design v3.0
   Clean professional style with blue accents
   ============================================ */

/* CSS Variables - Modern Blue Design System */
:root {
  /* Primary Colors - Modern Blue Palette */
  --cat-color-primary: #2563EB;
  --cat-color-primary-hover: #1D4ED8;
  --cat-color-primary-light: #DBEAFE;
  --cat-color-primary-dark: #1E40AF;
  --cat-color-primary-glow: rgba(37, 99, 235, 0.15);

  /* Secondary Colors - Cyan Accent */
  --cat-color-secondary: #06B6D4;
  --cat-color-secondary-light: #CFFAFE;
  --cat-color-accent: #F59E0B;
  --cat-color-accent-light: #FEF3C7;

  /* Gradient Definitions - Modern Blue */
  --cat-gradient-primary: linear-gradient(135deg, #2563EB 0%, #3B82F6 50%, #60A5FA 100%);
  --cat-gradient-soft: linear-gradient(135deg, #DBEAFE 0%, #EFF6FF 100%);
  --cat-gradient-card: linear-gradient(180deg, rgba(37, 99, 235, 0.02) 0%, rgba(59, 130, 246, 0.02) 100%);
  --cat-gradient-hover: linear-gradient(135deg, rgba(37, 99, 235, 0.06) 0%, rgba(59, 130, 246, 0.06) 100%);
  --cat-gradient-shine: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.15) 50%, transparent 100%);

  /* Base Colors - Clean Neutral */
  --cat-color-ink: #1E293B;
  --cat-color-ink-light: #475569;
  --cat-color-ink-muted: #94A3B8;
  --cat-color-ink-subtle: #CBD5E1;
  --cat-color-paper: #FFFFFF;
  --cat-color-paper-alt: #F8FAFC;
  --cat-color-text: #1E293B;
  --cat-color-text-secondary: #64748B;
  --cat-color-line: #E2E8F0;
  --cat-color-line-light: #F1F5F9;

  /* Typography */
  --cat-font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --cat-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --cat-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing - 8px Grid System */
  --cat-space-1: 4px;
  --cat-space-2: 8px;
  --cat-space-3: 12px;
  --cat-space-4: 16px;
  --cat-space-5: 20px;
  --cat-space-6: 24px;
  --cat-space-8: 32px;
  --cat-space-10: 40px;
  --cat-space-12: 48px;
  --cat-space-16: 64px;
  --cat-space-20: 80px;

  /* Border Radius */
  --cat-radius-xs: 4px;
  --cat-radius-sm: 8px;
  --cat-radius-md: 12px;
  --cat-radius-lg: 16px;
  --cat-radius-xl: 20px;
  --cat-radius-2xl: 24px;
  --cat-radius-full: 9999px;

  /* Shadows - Clean & Subtle */
  --cat-shadow-xs: 0 1px 2px rgba(37, 99, 235, 0.04);
  --cat-shadow-sm: 0 2px 8px rgba(37, 99, 235, 0.06);
  --cat-shadow-md: 0 4px 16px rgba(37, 99, 235, 0.08);
  --cat-shadow-lg: 0 8px 32px rgba(37, 99, 235, 0.10);
  --cat-shadow-xl: 0 16px 48px rgba(37, 99, 235, 0.12);
  --cat-shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
  --cat-shadow-card-hover: 0 8px 20px rgba(37, 99, 235, 0.12);
  --cat-shadow-glow: 0 0 25px rgba(37, 99, 235, 0.15);

  /* Transitions - Smooth & Refined */
  --cat-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --cat-ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --cat-duration-fast: 150ms;
  --cat-duration-normal: 250ms;
  --cat-duration-slow: 400ms;

  /* Bento Grid Variables */
  --cat-bento-gap: 16px;
  --cat-bento-radius: 16px;
  --cat-card-hover-scale: 1.01;
  --cat-card-hover-lift: -3px;
}

/* Dark Mode - Modern Blue Dark */
@media (prefers-color-scheme: dark) {
  :root {
    --cat-color-primary: #60A5FA;
    --cat-color-primary-hover: #93C5FD;
    --cat-color-primary-light: #1E3A5F;
    --cat-color-primary-dark: #BFDBFE;

    --cat-color-secondary: #22D3EE;
    --cat-color-secondary-light: #083344;
    --cat-color-accent: #FBBF24;
    --cat-color-accent-light: #451A03;

    --cat-gradient-primary: linear-gradient(135deg, #60A5FA 0%, #93C5FD 50%, #BFDBFE 100%);
    --cat-gradient-soft: linear-gradient(135deg, #1E3A5F 0%, #0F172A 100%);
    --cat-gradient-card: linear-gradient(180deg, rgba(96, 165, 250, 0.06) 0%, rgba(147, 197, 253, 0.06) 100%);
    --cat-gradient-hover: linear-gradient(135deg, rgba(96, 165, 250, 0.1) 0%, rgba(147, 197, 253, 0.1) 100%);

    --cat-color-ink: #F1F5F9;
    --cat-color-ink-light: #CBD5E1;
    --cat-color-ink-muted: #64748B;
    --cat-color-ink-subtle: #475569;
    --cat-color-paper: #0F172A;
    --cat-color-paper-alt: #1E293B;
    --cat-color-text: #F8FAFC;
    --cat-color-text-secondary: #94A3B8;
    --cat-color-line: #334155;
    --cat-color-line-light: #1E293B;

    --cat-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --cat-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --cat-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --cat-shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3);
    --cat-shadow-card-hover: 0 8px 20px rgba(96, 165, 250, 0.2);
    --cat-shadow-glow: 0 0 30px rgba(96, 165, 250, 0.2);
  }
}

/* ============================================
   PAGE LAYOUT
   ============================================ */

/* Page wrapper with categories class */
.type-categories #page {
  background: var(--cat-color-paper);
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--cat-space-8) var(--cat-space-4);
}

.type-categories #page .category-lists {
  padding: 0;
}

/* ============================================
   BENTO HEADER
   ============================================ */

.categories-bento-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--cat-bento-gap);
  margin-bottom: var(--cat-space-8);
}

/* Search Card */
.categories-search-card {
  background: var(--cat-color-paper);
  border: 2px solid var(--cat-color-line);
  border-radius: var(--cat-bento-radius);
  padding: var(--cat-space-5) var(--cat-space-6);
  box-shadow: var(--cat-shadow-card);
  position: relative;
  transition: all var(--cat-duration-normal) var(--cat-ease-out);
}

.categories-search-card:hover {
  border-color: var(--cat-color-primary-light);
  box-shadow: var(--cat-shadow-sm);
}

.categories-search-wrapper {
  display: flex;
  align-items: center;
  gap: var(--cat-space-3);
}

.categories-search-icon {
  width: 20px;
  height: 20px;
  color: var(--cat-color-ink-muted);
  flex-shrink: 0;
}

.categories-search-input {
  flex: 1;
  padding: var(--cat-space-3);
  font-family: var(--cat-font-body);
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--cat-color-text);
  background: transparent;
  border: none;
  transition: all var(--cat-duration-fast) var(--cat-ease-out);
}

.categories-search-input:focus {
  outline: none;
}

.categories-search-input::placeholder {
  color: var(--cat-color-ink-subtle);
}

.categories-search-clear {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--cat-color-ink-muted);
  opacity: 0;
  visibility: hidden;
  transition: all var(--cat-duration-fast) var(--cat-ease-out);
}

.categories-search-clear.visible {
  opacity: 1;
  visibility: visible;
}

.categories-search-clear:hover {
  color: var(--cat-color-primary);
}

.categories-search-clear svg {
  width: 14px;
  height: 14px;
}

/* Stats Grid */
.categories-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--cat-bento-gap);
}

.categories-stat-card {
  background: var(--cat-color-paper);
  border: 2px solid var(--cat-color-line);
  border-radius: var(--cat-radius-lg);
  padding: var(--cat-space-4) var(--cat-space-5);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all var(--cat-duration-normal) var(--cat-ease-out);
}

.categories-stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--cat-gradient-primary);
  transform: scaleX(0);
  transition: transform var(--cat-duration-normal) var(--cat-ease-out);
}

.categories-stat-card:hover {
  border-color: var(--cat-color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--cat-shadow-card-hover);
}

.categories-stat-card:hover::before {
  transform: scaleX(1);
}

.categories-stat-icon {
  width: 36px;
  height: 36px;
  margin: 0 auto var(--cat-space-2);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cat-color-primary-light);
  border-radius: var(--cat-radius-sm);
  color: var(--cat-color-primary);
}

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

.categories-stat-value {
  font-family: var(--cat-font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--cat-color-ink);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.categories-stat-label {
  font-family: var(--cat-font-mono);
  font-size: 0.625rem;
  font-weight: 600;
  color: var(--cat-color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--cat-space-1);
}

/* ============================================
   CATEGORY BENTO GRID
   ============================================ */

.type-categories #page .category-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--cat-bento-gap);
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Category Card */
.type-categories #page .category-list > .category-list-item {
  background: var(--cat-color-paper);
  border: 2px solid var(--cat-color-line);
  border-radius: var(--cat-bento-radius);
  padding: 0;
  transition: all var(--cat-duration-normal) var(--cat-ease-out);
  overflow: hidden;
  box-shadow: var(--cat-shadow-card);
  position: relative;
}

.type-categories #page .category-list > .category-list-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--cat-gradient-primary);
  transform: scaleX(0);
  transition: transform var(--cat-duration-normal) var(--cat-ease-out);
}

.type-categories #page .category-list > .category-list-item:hover {
  border-color: var(--cat-color-primary);
  box-shadow: var(--cat-shadow-card-hover);
  transform: translateY(var(--cat-card-hover-lift));
}

.type-categories #page .category-list > .category-list-item:hover::before {
  transform: scaleX(1);
}

/* Featured Card */
.type-categories #page .category-list > .category-list-item:first-child {
  grid-column: span 2;
}

@media (max-width: 640px) {
  .type-categories #page .category-list > .category-list-item:first-child {
    grid-column: span 1;
  }
}

/* Category Link */
.type-categories #page .category-list-link {
  display: flex;
  align-items: center;
  padding: var(--cat-space-5) var(--cat-space-5);
  text-decoration: none;
  color: var(--cat-color-text);
  position: relative;
  min-height: 70px;
}

/* Category Icon */
.category-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cat-color-primary-light);
  border-radius: var(--cat-radius-sm);
  margin-right: var(--cat-space-3);
  font-size: 1.25rem;
  flex-shrink: 0;
  transition: all var(--cat-duration-normal) var(--cat-ease-out);
}

.type-categories #page .category-list-item:hover .category-icon {
  background: var(--cat-gradient-primary);
  transform: scale(1.05);
}

/* Category Count - Right side, next to name */
.category-list-link > .category-list-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 24px;
  padding: 0 var(--cat-space-2);
  font-family: var(--cat-font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--cat-color-ink-muted);
  background: var(--cat-color-paper-alt);
  border: 1px solid var(--cat-color-line);
  border-radius: var(--cat-radius-full);
  margin-left: var(--cat-space-2);
  flex-shrink: 0;
  transition: all var(--cat-duration-normal) var(--cat-ease-out);
}

.type-categories #page .category-list-item:hover > .category-list-count {
  color: var(--cat-color-primary);
  border-color: var(--cat-color-primary);
  background: var(--cat-color-primary-light);
}

/* Category Name */
.category-name {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.category-name-text {
  font-family: var(--cat-font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--cat-color-ink);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--cat-duration-fast) var(--cat-ease-out);
}

.type-categories #page .category-list-item:hover .category-name-text {
  color: var(--cat-color-primary);
}

/* Expand Toggle Button */
.category-toggle-btn {
  position: absolute;
  right: var(--cat-space-3);
  bottom: var(--cat-space-3);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cat-color-paper-alt);
  border: 1px solid var(--cat-color-line);
  border-radius: var(--cat-radius-sm);
  cursor: pointer;
  color: var(--cat-color-ink-muted);
  transition: all var(--cat-duration-fast) var(--cat-ease-out);
}

.category-toggle-btn:hover {
  background: var(--cat-color-primary-light);
  border-color: var(--cat-color-primary);
  color: var(--cat-color-primary);
}

.category-toggle-btn svg {
  width: 12px;
  height: 12px;
  transition: transform var(--cat-duration-normal) var(--cat-ease-spring);
}

.category-list-item.expanded > .category-list-link .category-toggle-btn svg {
  transform: rotate(180deg);
}

.category-list-item:not(:has(.category-list-child)) .category-toggle-btn {
  display: none;
}

/* ============================================
   NESTED CATEGORIES
   ============================================ */

.category-lists .category-list-child {
  list-style: none;
  padding: 0 var(--cat-space-4) var(--cat-space-3);
  margin: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--cat-duration-slow) var(--cat-ease-out);
  border-top: 1px solid transparent;
}

.category-lists .category-list-item.expanded > .category-list-child {
  max-height: 300px;
  overflow-y: auto;
  border-top-color: var(--cat-color-line);
}

/* Custom scrollbar for child categories */
.category-lists .category-list-child::-webkit-scrollbar {
  width: 4px;
}

.category-lists .category-list-child::-webkit-scrollbar-track {
  background: transparent;
}

.category-lists .category-list-child::-webkit-scrollbar-thumb {
  background: var(--cat-color-line);
  border-radius: 4px;
}

.category-lists .category-list-child::-webkit-scrollbar-thumb:hover {
  background: var(--cat-color-primary);
}

.category-lists .category-list-child .category-list-item {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  margin: 0;
  box-shadow: none;
}

.category-lists .category-list-child .category-list-item::before {
  display: none;
}

.category-lists .category-list-child .category-list-link {
  padding: var(--cat-space-2) var(--cat-space-3);
  min-height: auto;
  border-radius: var(--cat-radius-sm);
}

.category-lists .category-list-child .category-list-link:hover {
  background: var(--cat-gradient-hover);
}

.category-lists .category-list-child .category-icon {
  width: 28px;
  height: 28px;
  font-size: 0.875rem;
  margin-right: var(--cat-space-2);
}

.category-lists .category-list-child .category-name-text {
  font-size: 0.8125rem;
}

.category-lists .category-list-child .category-list-count {
  min-width: 24px;
  height: 24px;
  font-size: 0.625rem;
}

/* ============================================
   NO RESULTS MESSAGE
   ============================================ */

.categories-no-results {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--cat-space-16) var(--cat-space-8);
  text-align: center;
  grid-column: 1 / -1;
}

.categories-no-results.visible {
  display: flex;
}

.categories-no-results-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cat-color-primary-light);
  border-radius: var(--cat-radius-lg);
  margin-bottom: var(--cat-space-4);
}

.categories-no-results-icon svg {
  width: 28px;
  height: 28px;
  color: var(--cat-color-primary);
}

.categories-no-results h3 {
  font-family: var(--cat-font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--cat-color-ink);
  margin-bottom: var(--cat-space-1);
}

.categories-no-results p {
  font-size: 0.875rem;
  color: var(--cat-color-ink-muted);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.type-categories #page .category-list > .category-list-item {
  animation: fadeInUp var(--cat-duration-slow) var(--cat-ease-out) forwards;
  opacity: 0;
}

.type-categories #page .category-list > .category-list-item:nth-child(1) { animation-delay: 0ms; }
.type-categories #page .category-list > .category-list-item:nth-child(2) { animation-delay: 40ms; }
.type-categories #page .category-list > .category-list-item:nth-child(3) { animation-delay: 80ms; }
.type-categories #page .category-list > .category-list-item:nth-child(4) { animation-delay: 120ms; }
.type-categories #page .category-list > .category-list-item:nth-child(5) { animation-delay: 160ms; }
.type-categories #page .category-list > .category-list-item:nth-child(6) { animation-delay: 200ms; }
.type-categories #page .category-list > .category-list-item:nth-child(7) { animation-delay: 240ms; }
.type-categories #page .category-list > .category-list-item:nth-child(8) { animation-delay: 280ms; }

.categories-search-card {
  animation: fadeInUp var(--cat-duration-normal) var(--cat-ease-out) forwards;
}

.categories-stat-card {
  animation: fadeInUp var(--cat-duration-normal) var(--cat-ease-out) forwards;
  opacity: 0;
}

.categories-stat-card:nth-child(1) { animation-delay: 60ms; }
.categories-stat-card:nth-child(2) { animation-delay: 100ms; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  .type-categories #page {
    padding: var(--cat-space-4);
  }

  .type-categories #page .category-list {
    grid-template-columns: 1fr;
  }

  .categories-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--cat-space-3);
  }

  .categories-stat-value {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .categories-stats-grid {
    grid-template-columns: 1fr;
  }

  .categories-stat-card {
    display: flex;
    align-items: center;
    gap: var(--cat-space-3);
    text-align: left;
    padding: var(--cat-space-3);
  }

  .categories-stat-icon {
    margin: 0;
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

.type-categories #page .category-list-link:focus-visible {
  outline: 2px solid var(--cat-color-primary);
  outline-offset: 2px;
}

.category-toggle-btn:focus-visible {
  outline: 2px solid var(--cat-color-primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .type-categories #page .category-list {
    display: block;
  }

  .type-categories #page .category-list > .category-list-item {
    break-inside: avoid;
    margin-bottom: var(--cat-space-3);
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .categories-search-card,
  .category-toggle-btn {
    display: none;
  }
}