:root {
  color-scheme: dark;
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #273449;
  --fg: #f8fafc;
  --fg-muted: #94a3b8;
  --accent: #22d3ee;
  --accent-2: #a855f7;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 12px;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero {
  text-align: center;
  padding: 4rem 1.5rem 2rem;
  background: radial-gradient(ellipse at top, rgba(34, 211, 238, 0.08), transparent 60%);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  margin: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
}

.hero .tagline {
  color: var(--fg-muted);
  font-size: 1.125rem;
  margin: 0.5rem 0 2rem;
}

.hero #search {
  width: min(560px, 90%);
  padding: 0.875rem 1.25rem;
  font-size: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg);
  outline: none;
  transition: border-color 0.15s;
  font-family: inherit;
}

.hero #search:focus { border-color: var(--accent); }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  padding: 0 1.5rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.tags button {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  padding: 0.375rem 0.875rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.tags button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 600;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  padding: 0 1.5rem 3rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: background 0.15s, transform 0.15s, border-color 0.15s;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card h2 {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 0;
  line-height: 1.35;
}

.card .subtitle {
  color: var(--fg-muted);
  font-size: 0.875rem;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card .author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--fg-muted);
}

.card .author img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
}

.card .meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--fg-muted);
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  gap: 0.5rem;
}

.card .meta .tags-row {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
}

.card .meta .tag {
  background: rgba(34, 211, 238, 0.1);
  color: var(--accent);
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.6875rem;
}

.empty {
  text-align: center;
  color: var(--fg-muted);
  padding: 2rem;
}

footer {
  margin-top: auto;
  padding: 2rem;
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--border);
}

footer a {
  color: var(--fg-muted);
  text-decoration: none;
  border-bottom: 1px dotted var(--border);
}

footer a:hover { color: var(--accent); border-bottom-color: var(--accent); }