/* ============================================================
   openEDU Landscape Styles
   ============================================================ */

:root {
  --primary: #06ffa5;
  --secondary: #00b894;
  --dark: #0a0e27;
  --darker: #050716;
  --light: #ffffff;
  --gray: #a0aec0;
  --gray-dark: #4a5568;
  --critical: #c0392b;
  --high: #b45309;
  --standard: #1d6fb8;
  --low: #5d6d7e;
  --card-bg: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.1);
  --header-grad-1: #0e1338;
  --header-grad-2: #221a4d;
  --radius: 12px;
  --radius-lg: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(160deg, var(--darker) 0%, var(--dark) 45%, #0b1030 100%);
  color: var(--light);
  line-height: 1.6;
  min-height: 100vh;
}

::selection {
  background: rgba(6, 255, 165, 0.3);
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--darker);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 6px;
  border: 2px solid var(--darker);
}

/* ============ Header ============ */
header {
  background:
    radial-gradient(ellipse at 15% 20%, rgba(6, 255, 165, 0.14) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 30%, rgba(123, 97, 255, 0.18) 0%, transparent 55%),
    linear-gradient(135deg, var(--header-grad-1) 0%, var(--header-grad-2) 100%);
  padding: 3.5rem 2rem 2.5rem;
  border-bottom: 3px solid var(--primary);
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 75%);
  pointer-events: none;
}

header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  animation: headerShimmer 4s ease-in-out infinite;
}

@keyframes headerShimmer {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.header-content {
  flex: 1;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  opacity: 0.85;
  margin-bottom: 0.5rem;
}

h1 {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 55%, #7b61ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--gray);
  margin-bottom: 0.5rem;
}

.stats {
  font-size: 0.95rem;
  color: var(--gray);
}

.stats strong {
  color: var(--primary);
  font-weight: 700;
}

.header-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.2s;
  display: inline-block;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: var(--dark);
}

.btn-primary:hover {
  background: var(--secondary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(6, 255, 165, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--light);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ============ Main ============ */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

/* ============ Controls / Search ============ */
.controls {
  margin-bottom: 2rem;
}

.search-container {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.search-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

#search {
  flex: 1;
  padding: 1rem 1.5rem;
  font-size: 1.05rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  color: var(--light);
  transition: border-color 0.2s, box-shadow 0.2s;
}

#search:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(6, 255, 165, 0.15);
}

#search::placeholder {
  color: var(--gray);
}

.search-results {
  font-size: 0.85rem;
  color: var(--gray);
  white-space: nowrap;
  min-width: max-content;
}

.filter-section {
  margin-bottom: 0.75rem;
}

.filter-section:last-child {
  margin-bottom: 0;
}

.filter-section strong {
  font-size: 0.85rem;
  color: var(--gray);
  margin-right: 0.5rem;
  display: inline-block;
  margin-bottom: 0.35rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.filter-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: var(--gray);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--light);
  transform: translateY(-1px);
}

.filter-btn.active {
  background: var(--primary);
  color: var(--dark);
  border-color: var(--primary);
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(6, 255, 165, 0.3);
}

/* ============ Category Nav ============ */
.category-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 7, 22, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.75rem 2rem;
  margin: 0 -2rem 2rem;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--primary) transparent;
}

.category-nav::-webkit-scrollbar {
  height: 3px;
}

.category-nav::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 3px;
}

#category-nav-items {
  display: flex;
  gap: 0.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.category-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  color: var(--gray);
  text-decoration: none;
  font-size: 0.8rem;
  white-space: nowrap;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.category-nav a:hover {
  color: var(--light);
  background: rgba(255, 255, 255, 0.07);
}

.category-nav a.active {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(6, 255, 165, 0.08);
}

.nav-count {
  font-size: 0.68rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  padding: 0.05rem 0.45rem;
  font-weight: 600;
}

/* ============ Stats Bar ============ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 3rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  text-align: center;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), transparent);
  opacity: 0.6;
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 12px 28px rgba(6, 255, 165, 0.12);
}

.stat-icon {
  font-size: 1.4rem;
  margin-bottom: 0.4rem;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ============ Landscape ============ */
.landscape {
  margin-bottom: 3rem;
}

.category {
  margin-bottom: 3rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease;
  scroll-margin-top: 5rem;
}

.category.filtering {
  opacity: 0;
  transform: scaleY(0.95);
}

.category-header {
  background: linear-gradient(135deg, rgba(74, 144, 226, 0.18) 0%, rgba(80, 200, 120, 0.18) 100%);
  padding: 1.5rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
}

.category-header::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--cat-color, var(--primary));
}

.category-title-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.category-icon {
  font-size: 1.5rem;
  display: inline-flex;
}

.category-header h2 {
  font-size: 1.5rem;
  margin-bottom: 0;
}

.category-header p {
  color: var(--gray);
  font-size: 0.9rem;
  margin-top: 0.25rem;
  padding-left: 2.25rem;
}

.count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6rem;
  height: 1.4rem;
  padding: 0 0.4rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--light);
  vertical-align: middle;
}

/* ============ Empty state ============ */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  max-width: 420px;
  margin: 0 auto;
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.empty-state h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--gray);
  margin-bottom: 1.5rem;
}

.clear-filters-btn {
  padding: 0.6rem 1.5rem;
  border: 1px solid var(--primary);
  border-radius: 999px;
  background: transparent;
  color: var(--primary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
}

.clear-filters-btn:hover {
  background: var(--primary);
  color: var(--dark);
}

/* ============ Subcategories & Items ============ */
.subcategory {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.subcategory:last-child {
  border-bottom: none;
}

.subcategory-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.subcategory-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(6, 255, 165, 0.25), transparent);
}

.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1rem;
}

/* ============ Active Filter Chips ============ */
.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  min-height: 0;
  transition: padding 0.2s;
}

.active-filters.has-filters {
  padding: 0.75rem 0 0.25rem;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(6, 255, 165, 0.12);
  border: 1px solid rgba(6, 255, 165, 0.35);
  color: var(--primary);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-chip:hover {
  background: rgba(6, 255, 165, 0.22);
  transform: translateY(-1px);
}

.chip-x {
  opacity: 0.7;
  font-size: 0.7rem;
}

.chip-clear-all {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--gray);
}

.chip-clear-all:hover {
  color: var(--light);
  border-color: rgba(255, 255, 255, 0.4);
}

body.light-theme .filter-chip {
  background: rgba(11, 143, 94, 0.1);
  border-color: rgba(11, 143, 94, 0.4);
}

/* ============ Item Cards ============ */
.item-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: all 0.25s cubic-bezier(0.2, 0.7, 0.3, 1);
  cursor: pointer;
  text-decoration: none;
  color: var(--light);
  display: block;
  position: relative;
  overflow: hidden;
}

/* Mouse-tracking spotlight that follows the cursor across the card */
.item-card {
  background:
    radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.07), transparent 70%),
    var(--card-bg);
}
body.light-theme .item-card {
  background:
    radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(13, 42, 74, 0.05), transparent 70%),
    var(--card-bg);
}

/* Gradient accent along the top edge, tinted per-service */
.item-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent, var(--primary)), transparent 80%);
  opacity: 0.55;
  transition: opacity 0.25s;
}

.item-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent, var(--primary));
  box-shadow:
    0 12px 28px rgba(0, 0, 0, 0.35),
    0 0 0 1px var(--accent, var(--primary)) inset;
}

.item-card:hover::before {
  opacity: 1;
}

/* Card entry animation */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.items-grid .item-card {
  animation: fadeInUp 0.35s ease both;
}

.items-grid .item-card:nth-child(1) { animation-delay: 0.00s; }
.items-grid .item-card:nth-child(2) { animation-delay: 0.04s; }
.items-grid .item-card:nth-child(3) { animation-delay: 0.08s; }
.items-grid .item-card:nth-child(4) { animation-delay: 0.12s; }
.items-grid .item-card:nth-child(5) { animation-delay: 0.16s; }
.items-grid .item-card:nth-child(6) { animation-delay: 0.20s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .item-card,
  .item-card:hover {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}

/* Search term highlighting */
mark {
  background: rgba(6, 255, 165, 0.22);
  color: var(--primary);
  border-radius: 3px;
  padding: 0 2px;
}
body.light-theme mark {
  background: rgba(6, 255, 165, 0.45);
  color: #0b5c40;
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
  gap: 0.5rem;
}

.item-name-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  flex: 1;
}

.item-logo {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  flex-shrink: 0;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.06);
  padding: 3px;
  transition: transform 0.2s;
}

.item-card:hover .item-logo {
  transform: scale(1.08);
}

.item-logo-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: white;
  width: 38px;
  height: 38px;
  border-radius: 9px;
  flex-shrink: 0;
}

.item-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--light);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.item-badges {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.3rem;
  flex-shrink: 0;
}

.tier-badge {
  font-size: 0.65rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.tier-critical { background: var(--critical); color: white; }
.tier-high { background: var(--high); color: white; }
.tier-standard { background: var(--standard); color: white; }
.tier-low { background: var(--low); color: white; }

.maturity-badge {
  font-size: 0.62rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.4px;
  border: 1px solid;
  white-space: nowrap;
}

.maturity-graduated {
  color: #06ffa5;
  border-color: rgba(6, 255, 165, 0.4);
  background: rgba(6, 255, 165, 0.08);
}

.maturity-production {
  color: #7dd3fc;
  border-color: rgba(125, 211, 252, 0.4);
  background: rgba(125, 211, 252, 0.08);
}

.maturity-beta {
  color: #fbbf24;
  border-color: rgba(251, 191, 36, 0.4);
  background: rgba(251, 191, 36, 0.08);
}

.maturity-planned {
  color: #c4b5fd;
  border-color: rgba(196, 181, 253, 0.4);
  background: rgba(196, 181, 253, 0.08);
}

.item-description {
  font-size: 0.85rem;
  color: var(--gray);
  margin-bottom: 0.75rem;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.item-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--gray);
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  flex-wrap: wrap;
}

.item-license {
  background: rgba(255, 255, 255, 0.06);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-weight: 600;
}

.item-language {
  background: rgba(6, 255, 165, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  color: var(--primary);
}

.item-docs {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: transform 0.2s;
  display: inline-block;
}

.item-docs:hover {
  transform: scale(1.25);
}

.item-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--gray);
  margin-top: 0.5rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.item-stars {
  color: #f39c12;
  font-weight: 600;
}

.item-org {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
  flex: 1;
  color: var(--gray);
}

.item-repo {
  font-size: 0.7rem;
  color: var(--gray);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: 'SF Mono', 'Cascadia Code', Consolas, monospace;
}

.item-tags {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  margin-top: 0.6rem;
}

.tag {
  font-size: 0.68rem;
  padding: 0.15rem 0.45rem;
  background: rgba(6, 255, 165, 0.08);
  border: 1px solid rgba(6, 255, 165, 0.22);
  border-radius: 4px;
  color: var(--primary);
  transition: background 0.15s, color 0.15s;
}

.item-card:hover .tag {
  background: rgba(6, 255, 165, 0.14);
}

/* ============ Legend ============ */
.legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  margin-bottom: 3rem;
  font-size: 0.8rem;
  color: var(--gray);
}

.legend h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--light);
  margin-right: 0.5rem;
}

.legend-items {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  display: inline-block;
}

.legend-sep {
  width: 1px;
  height: 18px;
  background: rgba(255, 255, 255, 0.15);
}

/* ============ Metadata ============ */
.metadata {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 3rem;
}

.metadata h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--primary);
}

.metadata-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.metadata-section h3 {
  font-size: 1.05rem;
  margin-bottom: 1rem;
  color: var(--light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.metadata-section h3::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.stat-bar {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-bar:last-child {
  border-bottom: none;
}

.stat-bar-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stat-bar-track {
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.stat-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width 0.8s cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* Tier distribution donut */
.tier-donut-wrap {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.6rem 0 1rem;
}

.tier-donut {
  width: 108px;
  height: 108px;
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
}

.tier-donut-hole {
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.tier-donut-hole strong {
  font-size: 1.35rem;
  color: var(--light);
  line-height: 1.1;
}

.tier-donut-hole span {
  font-size: 0.7rem;
  color: var(--gray);
}

.tier-donut-legend {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--gray);
}

.tier-donut-legend span {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.tier-donut-legend i {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  display: inline-block;
  flex-shrink: 0;
}

body.light-theme .tier-donut-hole {
  background: var(--bg);
}

.stat-label-sm {
  font-size: 0.85rem;
  color: var(--gray);
}

.stat-value {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

/* ============ Info Section ============ */
.info {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 3rem;
}

.info h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.info h3 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--light);
}

.info p, .info li {
  color: var(--gray);
  margin-bottom: 0.5rem;
}

.info ul {
  padding-left: 1.5rem;
}

.info a {
  color: var(--primary);
  text-decoration: none;
}

.info a:hover {
  text-decoration: underline;
}

.info code {
  background: rgba(255, 255, 255, 0.06);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'SF Mono', 'Cascadia Code', Consolas, monospace;
  font-size: 0.85rem;
  color: var(--primary);
}

/* ============ Footer ============ */
footer {
  background: rgba(0, 0, 0, 0.35);
  padding: 2.5rem 2rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--gray);
  font-size: 0.85rem;
}

footer a {
  color: var(--primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.footer-stats {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  opacity: 0.7;
}

/* ============ Back to top ============ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  background: rgba(10, 14, 39, 0.9);
  color: var(--primary);
  font-size: 1.3rem;
  cursor: pointer;
  z-index: 500;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary);
  color: var(--dark);
  transform: translateY(-3px);
}

/* ============ Modal ============ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.modal-box {
  background: var(--dark);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  max-width: 640px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  animation: modalIn 0.25s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(255, 255, 255, 0.06);
  border: none;
  color: var(--gray);
  font-size: 1.4rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1;
}

.modal-close:hover {
  background: var(--primary);
  color: var(--dark);
  transform: rotate(90deg);
}

.modal-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.modal-header h2 {
  font-size: 1.5rem;
  margin-bottom: 0.4rem;
}

.modal-logo {
  width: 64px;
  height: 64px;
  object-fit: contain;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  padding: 6px;
  flex-shrink: 0;
}

.modal-logo-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 800;
  color: white;
}

.modal-badges {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.modal-description {
  color: var(--gray);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.modal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.modal-links a {
  color: var(--primary);
  text-decoration: none;
  padding: 0.45rem 1rem;
  border: 1px solid rgba(6, 255, 165, 0.35);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s;
}

.modal-links a:hover {
  background: var(--primary);
  color: var(--dark);
}

.modal-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem 1.5rem;
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}

.modal-details > div {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.detail-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--gray);
  font-weight: 700;
}

/* ============ Light Theme ============ */
body.light-theme {
  --dark: #f8f9fa;
  --darker: #e9ecef;
  --light: #212529;
  --gray: #495057;
  --gray-dark: #6c757d;
  --card-bg: #ffffff;
  --card-border: #dee2e6;
  --header-grad-1: #1a1f4e;
  --header-grad-2: #2e1f4e;
}

body.light-theme {
  background: linear-gradient(160deg, #e9ecef 0%, #f8f9fa 100%);
}

body.light-theme .item-card {
  background:
    radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(13, 42, 74, 0.05), transparent 70%),
    #ffffff;
  color: #212529;
  border-color: #dee2e6;
}

body.light-theme .item-card:hover {
  border-color: var(--primary);
  transform: translateY(-5px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
}

body.light-theme .item-name {
  color: #212529;
}

body.light-theme .category-header {
  background: rgba(0, 0, 0, 0.03);
}

body.light-theme .category-header p {
  color: #6c757d;
}

body.light-theme .search-container,
body.light-theme .stat-card,
body.light-theme .metadata,
body.light-theme .info,
body.light-theme .legend {
  background: rgba(255, 255, 255, 0.85);
  border-color: #dee2e6;
}

body.light-theme #search {
  background: #ffffff;
  border-color: #dee2e6;
  color: #212529;
}

body.light-theme .filter-btn {
  background: #e9ecef;
  color: #495057;
  border-color: #dee2e6;
}

body.light-theme .filter-btn:hover {
  background: #dee2e6;
  color: #212529;
}

body.light-theme .filter-btn.active {
  background: var(--primary);
  color: #212529;
  border-color: var(--primary);
}

body.light-theme header {
  background:
    radial-gradient(ellipse at 15% 20%, rgba(6, 255, 165, 0.14) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 30%, rgba(123, 97, 255, 0.2) 0%, transparent 55%),
    linear-gradient(135deg, #1a1f4e 0%, #2e1f4e 100%);
}

body.light-theme .tag {
  background: rgba(0, 0, 0, 0.06);
  color: #2f855a;
  border-color: rgba(0, 0, 0, 0.12);
}

body.light-theme .category-nav {
  background: rgba(233, 236, 239, 0.94);
  border-bottom-color: #dee2e6;
}

body.light-theme .category-nav a {
  color: var(--gray);
}

body.light-theme .category-nav a:hover {
  color: var(--light);
  background: rgba(0, 0, 0, 0.05);
}

body.light-theme .tier-badge,
body.light-theme .maturity-badge {
  opacity: 0.9;
}

body.light-theme .item-license {
  background: #e9ecef;
}

body.light-theme .item-language {
  background: rgba(6, 255, 165, 0.15);
  color: #0b7a54;
}

body.light-theme .item-description,
body.light-theme .item-org {
  color: #6c757d;
}

body.light-theme .subcategory {
  border-bottom-color: rgba(0, 0, 0, 0.05);
}

body.light-theme .count-badge {
  background: rgba(0, 0, 0, 0.08);
  color: #495057;
}

body.light-theme .nav-count {
  background: rgba(0, 0, 0, 0.08);
}

body.light-theme .modal-box {
  background: #ffffff;
  border-color: #dee2e6;
}

body.light-theme .modal-description {
  color: #495057;
}

body.light-theme .modal-details {
  background: #f8f9fa;
  border-color: #dee2e6;
}

body.light-theme .detail-label {
  color: #6c757d;
}

body.light-theme .modal-close {
  color: #495057;
  background: #e9ecef;
}

body.light-theme .back-to-top {
  background: rgba(255, 255, 255, 0.92);
  color: var(--dark);
}

body.light-theme .back-to-top:hover {
  background: var(--primary);
  color: var(--dark);
}

body.light-theme .stat-bar {
  border-bottom-color: rgba(0, 0, 0, 0.06);
}

body.light-theme ::-webkit-scrollbar-track {
  background: #e9ecef;
}

body.light-theme ::-webkit-scrollbar-thumb {
  border-color: #e9ecef;
}

/* ============ Loading skeleton ============ */
.skeleton-container {
  padding: 2rem;
}

.skeleton-category {
  margin-bottom: 2rem;
}

.skeleton-header {
  height: 2.5rem;
  width: 40%;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  margin-bottom: 1rem;
  animation: skeletonPulse 1.5s ease-in-out infinite;
}

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.skeleton-card {
  height: 200px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  animation: skeletonPulse 1.5s ease-in-out infinite;
}

.skeleton-card:nth-child(2) { animation-delay: 0.2s; }
.skeleton-card:nth-child(3) { animation-delay: 0.4s; }
.skeleton-card:nth-child(4) { animation-delay: 0.6s; }

@keyframes skeletonPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}

body.light-theme .skeleton-header {
  background: rgba(0, 0, 0, 0.08);
}

body.light-theme .skeleton-card {
  background: rgba(0, 0, 0, 0.05);
}

@media (prefers-reduced-motion: reduce) {
  .skeleton-header,
  .skeleton-card {
    animation: none;
    opacity: 0.3;
  }
}

/* ============ Responsive ============ */
@media (max-width: 768px) {
  h1 {
    font-size: 1.85rem;
  }

  .header-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .header-actions {
    width: 100%;
    gap: 0.5rem;
  }

  .header-actions .btn {
    font-size: 0.8rem;
    padding: 0.5rem 0.9rem;
  }

  .search-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .search-results {
    text-align: right;
  }

  .items-grid {
    grid-template-columns: 1fr;
  }

  .filter-buttons {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .filter-btn {
    flex: 1 1 auto;
  }

  .modal-details {
    grid-template-columns: 1fr !important;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .metadata-grid {
    grid-template-columns: 1fr;
  }

  .category-nav {
    margin: 0 -1rem 1.5rem;
    padding: 0.5rem 1rem;
  }

  .category-header {
    padding: 1.25rem 1.5rem;
  }

  .category-header p {
    padding-left: 0;
  }

  .subcategory {
    padding: 1.25rem 1.5rem;
  }

  .export-buttons {
    order: 10;
    width: 100%;
  }

  .tier-donut-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

  .active-filters.has-filters {
    padding: 0.5rem 0 0.25rem;
  }

  .back-to-top {
    bottom: 1rem;
    right: 1rem;
  }

  .legend {
    padding: 0.85rem 1rem;
  }
}

@media (max-width: 420px) {
  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============ Hidden state ============ */
.hidden {
  display: none !important;
}

/* ============ Highlight match ============ */
.highlight {
  background: rgba(6, 255, 165, 0.3);
  padding: 0 2px;
  border-radius: 2px;
}