:root {
  --bg: #050507;
  --bg-1: #0a0a12;
  --bg-2: #0f0f1c;
  --bg-3: #14142a;
  --text: #e8e9f0;
  --text-dim: #8a8da3;
  --text-mute: #555870;
  --accent: #00d4ff;
  --accent-2: #00ff88;
  --accent-3: #ff4d8b;
  --warn: #ffaa00;
  --grid: rgba(0, 212, 255, 0.06);
  --card-bg: rgba(15, 15, 28, 0.72);
  --card-bd: rgba(0, 212, 255, 0.12);
}

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

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

.bg-grid {
  position: fixed; inset: 0; z-index: -1;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 80%);
}

.site-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 32px 32px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-mark {
  font-size: 40px;
  color: var(--accent);
  text-shadow: 0 0 24px var(--accent);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.95); }
}

.brand h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand p {
  font-size: 14px;
  color: var(--text-dim);
  margin-top: 4px;
}

.stats {
  display: flex;
  gap: 32px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 12px;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px 64px;
}

.cat-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 40px;
  padding: 12px;
  background: var(--bg-1);
  border-radius: 16px;
  border: 1px solid var(--card-bd);
}

.cat-pill {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid transparent;
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cat-pill span {
  font-size: 11px;
  color: var(--text-mute);
  background: var(--bg-3);
  padding: 2px 6px;
  border-radius: 6px;
  font-variant-numeric: tabular-nums;
}

.cat-pill:hover {
  color: var(--text);
  background: var(--bg-2);
}

.cat-pill.active {
  background: var(--bg-3);
  color: var(--accent);
  border-color: var(--accent);
}

.cat-pill.active span {
  background: var(--accent);
  color: var(--bg);
}

.cat-section {
  margin-bottom: 56px;
}

.cat-heading {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.cat-count {
  font-size: 12px;
  color: var(--text-mute);
  background: var(--bg-2);
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  position: relative;
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--card-bd);
  border-radius: 14px;
  padding: 20px;
  color: var(--text);
  transition: all 0.2s cubic-bezier(0.6, 0, 0.4, 1);
  overflow: hidden;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.card-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(0, 212, 255, 0.12) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 212, 255, 0.15);
}

.card:hover .card-glow {
  opacity: 1;
}

.card-cat {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  background: rgba(0, 212, 255, 0.08);
  padding: 3px 8px;
  border-radius: 6px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.card-brief {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 16px;
  min-height: 36px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-mute);
  font-family: 'SF Mono', Menlo, monospace;
}

.card-slug {
  font-variant-numeric: tabular-nums;
}

.card-arrow {
  color: var(--accent);
  font-size: 16px;
  transition: transform 0.2s;
}

.card:hover .card-arrow {
  transform: translate(2px, -2px);
}

.empty {
  text-align: center;
  padding: 80px 32px;
  background: var(--bg-1);
  border: 1px dashed var(--card-bd);
  border-radius: 16px;
  margin-bottom: 40px;
}

.empty h2 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--text);
}

.empty p {
  color: var(--text-dim);
}

footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 32px 64px;
  text-align: center;
  color: var(--text-mute);
  font-size: 13px;
  border-top: 1px solid var(--card-bd);
}

footer p { margin: 4px 0; }

@media (max-width: 640px) {
  .site-header {
    padding: 32px 20px 20px;
    flex-direction: column;
    align-items: flex-start;
  }
  main { padding: 12px 20px 48px; }
  .stats { gap: 20px; }
  .stat-num { font-size: 22px; }
  .brand h1 { font-size: 24px; }
}