:root {
  /* Brand & Status Color Tokens */
  --primary-color: #4361ee;
  --secondary-color: #3f37c9;
  --success-color: #4cc9f0;
  --danger-color: #f72585;
  --warning-color: #f8961e;
  --info-color: #4895ef;
  --purple-color: #7209b7;
  --pink-color: #f72585;
  --teal-color: #20c997;
  --red-color: #dc3545;
  --green-color: #28a745;
  --neutral-muted: #6c757d;
  --bookmark-active: #ffc107;

  /* Theme Surface & Base Tokens */
  --light-color: #f8f9fa;
  --dark-color: #212529;
  --bg-color: #121212;
  --card-bg: #1e1e1e;
  --surface-subtle: rgba(255, 255, 255, 0.04);
  --overlay-bg: rgba(0, 0, 0, 0.7);
  --overlay-bg-hover: rgba(0, 0, 0, 0.9);
  --text-color: #e9ecef;
  --border-color: #444d56;
  --gradient-start: #4361ee;
  --gradient-end: #3a0ca3;
  --skeleton-base: #2e2e2e;
  --skeleton-shine: #3e3e3e;

  /* Spacing Scale Tokens */
  --space-3xs: 0.125rem; /* 2px */
  --space-2xs: 0.25rem;  /* 4px */
  --space-xs: 0.375rem;  /* 6px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 0.75rem;   /* 12px */
  --space-lg: 1rem;      /* 16px */
  --space-xl: 1.25rem;   /* 20px */
  --space-2xl: 1.5rem;   /* 24px */

  /* Border Radius Tokens */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 50px;
  --radius-circle: 50%;

  /* Motion & Transition Tokens */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* Elevation / Shadow Tokens */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.25);
  --focus-ring: 0 0 0 0.25rem rgba(67, 97, 238, 0.35);
}

[data-bs-theme="light"] {
  --bg-color: #f8f9fa;
  --card-bg: #ffffff;
  --surface-subtle: rgba(0, 0, 0, 0.03);
  --overlay-bg: rgba(33, 37, 41, 0.8);
  --overlay-bg-hover: rgba(33, 37, 41, 0.95);
  --text-color: #212529;
  --border-color: #dee2e6;
  --gradient-start: #4361ee;
  --gradient-end: #4cc9f0;
  --skeleton-base: #e2e5ea;
  --skeleton-shine: #f0f2f5;

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.1);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
}

/* Header Styles */
.gradient-header {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: white;
  position: relative;
}

.app-logo {
  height: 60px;
  width: 60px;
  border-radius: var(--radius-lg);
}

.version-badge {
  font-size: 0.6em;
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-3xs) var(--space-sm);
  border-radius: var(--radius-pill);
  vertical-align: middle;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  border-radius: var(--radius-pill);
  padding: var(--space-sm) var(--space-xl);
  font-weight: 500;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal);
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-color);
  color: white;
  padding: var(--space-sm) var(--space-lg);
  z-index: 10000;
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) 0;
  transition: top var(--transition-fast);
}
.skip-to-content:focus {
  top: 0;
}

/* Quick Actions Bar */
.quick-actions-bar .btn i {
  font-size: 0.9em;
}
.quick-actions-bar {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
}

/* Filter Section */
.filter-section {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
}

/* Stats Section */
.stats-section {
  background-color: rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid var(--border-color);
}

.bg-purple {
  background-color: var(--purple-color) !important;
}

.bg-pink {
  background-color: var(--pink-color) !important;
}

.bg-teal {
  background-color: var(--teal-color) !important;
}

.bg-red {
  background-color: var(--red-color) !important;
}

/* Card Styles */
.site-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-fast);
  height: 100%;
  overflow: hidden;
  position: relative;
}

.site-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-img-container {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  background-color: var(--surface-subtle);
  border-bottom: 1px solid var(--border-color);
}

.card-thumbnail {
  max-height: 100%;
  max-width: 100%;
  border-radius: var(--radius-md);
  object-fit: contain;
  transition: transform var(--transition-normal);
}

.site-card:hover .card-thumbnail {
  transform: scale(1.04);
}

.site-card:focus-within {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.card-body {
  padding: var(--space-xl);
  text-align: center;
}

.site-name {
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--text-color);
  text-decoration: none;
  display: block;
  text-align: center;
  transition: color var(--transition-fast);
}

.site-name:hover {
  color: var(--primary-color);
}

.site-type {
  display: inline-block;
  padding: var(--space-2xs) var(--space-md);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: var(--space-sm);
}

.type-manga {
  background-color: rgba(76, 201, 240, 0.18);
  color: var(--success-color);
}

.type-ln {
  background-color: rgba(248, 150, 30, 0.18);
  color: var(--warning-color);
}

.type-movie {
  background-color: rgba(67, 97, 238, 0.18);
  color: var(--primary-color);
}

.type-app {
  background-color: rgba(114, 9, 183, 0.18);
  color: var(--purple-color);
}

.type-anime {
  background-color: rgba(247, 37, 133, 0.18);
  color: var(--pink-color);
}

.type-learning {
  background-color: rgba(32, 201, 151, 0.18);
  color: var(--teal-color);
}

.type-nsfw {
  background-color: rgba(220, 53, 69, 0.18);
  color: var(--red-color);
}

.type-unknown {
  background-color: rgba(108, 117, 125, 0.18);
  color: var(--neutral-muted);
}

/* Health Status */
.health-status {
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  margin-bottom: var(--space-sm);
}

.health-online {
  color: var(--green-color);
}

.health-offline {
  color: var(--red-color);
}

.health-checking {
  color: var(--neutral-muted);
}

/* Bookmark Button */
.bookmark-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--overlay-bg);
  border: none;
  border-radius: var(--radius-circle);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: background-color var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
  z-index: 10;
}

.bookmark-btn:hover {
  background: var(--overlay-bg-hover);
  transform: scale(1.08);
}

.bookmark-btn.bookmarked {
  color: var(--bookmark-active);
}

/* Quick Actions Menu */
.quick-actions-menu {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 20;
}

.quick-actions-btn {
  background: var(--overlay-bg);
  border: none;
  border-radius: var(--radius-circle);
  width: 32px;
  height: 32px;
  position: absolute;
  top: 10px;
  left: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: opacity var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
  opacity: 0;
  z-index: 20;
}

@media (hover: hover) {
  .site-card:hover .quick-actions-btn {
    opacity: 1;
  }
}

@media (hover: none) {
  .quick-actions-btn {
    opacity: 0.55;
  }
}

.quick-actions-btn:hover {
  background: var(--overlay-bg-hover);
  transform: scale(1.08);
}

/* NSFW Warning Badge */
.nsfw-warning {
  position: absolute;
  top: 10px;
  left: 50px;
  background: rgba(220, 53, 69, 0.9);
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  font-weight: 600;
  z-index: 10;
}

/* Content Warning Badges */
.content-warning {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(255, 193, 7, 0.9);
  color: #000;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.6rem;
  font-weight: 600;
  z-index: 10;
}

.warning-ads { background: rgba(255, 193, 7, 0.9); }
.warning-popups { background: rgba(220, 53, 69, 0.9); color: white; }
.warning-registration { background: rgba(32, 201, 151, 0.9); }

/* Quick Actions Modal */
#quickActionsModal .list-group-item {
  border: none;
  padding: var(--space-md) var(--space-lg);
  color: var(--text-color);
  background: var(--card-bg);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

#quickActionsModal .list-group-item:hover,
#quickActionsModal .list-group-item:focus-visible {
  background: var(--primary-color);
  color: white;
}

/* Focus-visible Ring Styles */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.btn:focus-visible,
.btn-check:focus + .btn,
.mobile-nav-item:focus-visible,
.bookmark-btn:focus-visible,
.quick-actions-btn:focus-visible,
.scroll-to-top:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}

/* Loading Animation */
.loading-spinner {
  display: inline-block;
  width: 1.2rem;
  height: 1.2rem;
  border: 0.2em solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spinner-border 0.75s linear infinite;
}

@keyframes spinner-border {
  to { transform: rotate(360deg); }
}

/* Fade in animation for cards */
.fade-in {
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Footer Links */
.footer-links .btn-link {
  color: var(--text-color);
  padding: 0.25rem 0.5rem;
}

.footer-links .btn-link:hover {
  color: var(--primary-color);
}

/* Filter Button Icons */
.filter-section .btn i {
  font-size: 0.9em;
}

/* Success/Error States */
.alert-success {
  border-left: 4px solid var(--green-color);
}

.alert-warning {
  border-left: 4px solid var(--bookmark-active);
}

.alert-info {
  border-left: 4px solid var(--info-color);
}

/* Temporary Alert */
.temp-alert {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  min-width: 300px;
}

@media (max-width: 768px) {
  .app-logo {
    height: 50px;
    width: 50px;
  }
  
  h1.display-5 {
    font-size: 1.8rem;
  }
  
  .card-img-container {
    height: 120px;
  }
  
  .theme-toggle-btn {
    padding: 6px 16px;
    font-size: 0.9rem;
  }
  
  .filter-section .btn {
    font-size: 0.8rem;
    padding: 0.375rem 0.75rem;
  }
  
  .filter-section .btn i {
    font-size: 0.8em;
    margin-right: 2px;
  }
  
  .quick-actions-bar .btn {
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
  }
}

@media (max-width: 576px) {
  .quick-actions-bar .btn {
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
  }

  .quick-actions-bar .btn span {
    display: none;
  }

  .quick-actions-bar .btn i {
    margin-right: 0;
  }
}

/* Footer */
footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
}

/* ─── Skeleton Loading ─────────────────────────────────────────────────────── */
.skeleton-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 100%;
}

.skeleton-img {
  height: 140px;
  background: linear-gradient(90deg, var(--skeleton-base) 25%, var(--skeleton-shine) 50%, var(--skeleton-base) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}

.skeleton-body {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.skeleton-line {
  border-radius: var(--radius-xs);
  background: linear-gradient(90deg, var(--skeleton-base) 25%, var(--skeleton-shine) 50%, var(--skeleton-base) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}

.skeleton-title {
  height: 18px;
  width: 70%;
  margin-bottom: var(--space-md);
}

.skeleton-subtitle {
  height: 12px;
  width: 50%;
  margin-bottom: var(--space-sm);
}

.skeleton-badge {
  height: 22px;
  width: 40%;
  border-radius: var(--radius-pill);
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ─── Empty State ──────────────────────────────────────────────────────────── */
.empty-state-svg {
  width: 140px;
  height: 112px;
  display: block;
  margin: 0 auto;
}

/* ─── Mobile Bottom Navigation ─────────────────────────────────────────────── */
.mobile-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  display: none;
  overflow-x: auto;
  z-index: 1000;
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.2);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.mobile-bottom-nav::-webkit-scrollbar {
  display: none;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 68px;
  padding: 8px 6px;
  border: none;
  background: transparent;
  color: var(--text-color);
  opacity: 0.55;
  transition: opacity 0.2s, color 0.2s;
  flex-shrink: 0;
  gap: 3px;
  cursor: pointer;
}

.mobile-nav-item i {
  font-size: 1.25rem;
  line-height: 1;
}

.mobile-nav-item span {
  font-size: 0.62rem;
  white-space: nowrap;
  line-height: 1;
}

.mobile-nav-item.active {
  color: var(--primary-color);
  opacity: 1;
}

.mobile-nav-item:hover {
  opacity: 0.85;
}

@media (max-width: 575.98px) {
  .mobile-bottom-nav {
    display: flex;
  }

  body {
    padding-bottom: 68px;
  }

  .card-img-container {
    height: 120px;
  }
}

/* Scroll to top */
.scroll-to-top {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-circle);
  background: var(--primary-color);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow), transform var(--transition-fast), background-color var(--transition-fast);
  z-index: 999;
  box-shadow: var(--shadow-md);
}
.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}
.scroll-to-top:hover {
  transform: translateY(-3px);
  background: var(--secondary-color);
}

@media (max-width: 575.98px) {
  .scroll-to-top {
    bottom: 80px;
    right: 16px;
    width: 40px;
    height: 40px;
  }
}

/* ─── Reduced Motion Support ────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .site-card:hover {
    transform: none;
  }

  .site-card:hover .card-thumbnail {
    transform: none;
  }

  .bookmark-btn:hover,
  .quick-actions-btn:hover,
  .scroll-to-top:hover {
    transform: none;
  }
}