:root {
  --bg: #0b0d12;
  --surface: #14171f;
  --surface-hover: #1b1f2a;
  --border: #262b38;
  --text: #e6e8ec;
  --text-dim: #9aa1b2;
  --accent: #6ee7b7;
  --accent-dim: #2dd4bf33;
}

* { box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  margin: 0;
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

header.hero {
  padding: 80px 0 48px;
  text-align: center;
}

header.hero h1 {
  font-size: 2.6rem;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

header.hero p {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 32px 0 48px;
}

.tag-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tag-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

.tag-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding-bottom: 80px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  background: var(--surface-hover);
  border-color: var(--accent);
  box-shadow: 0 12px 32px -12px var(--accent-dim);
}

.card h2 {
  margin: 0;
  font-size: 1.3rem;
}

.card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.5;
  flex-grow: 1;
}

.card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.card .tags span {
  background: var(--accent-dim);
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
}

.empty-state {
  text-align: center;
  color: var(--text-dim);
  padding: 60px 0;
  grid-column: 1 / -1;
}

footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  padding: 24px 0 48px;
}