:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --fg: #1c1e21;
  --card-bg: #ffffff;
  --card-border: #e2e4e8;
  --accent: #3461ff;
  --muted: #6b7280;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e7e9ea;
    --card-bg: #1f2227;
    --card-border: #2c2f36;
    --muted: #9aa0a8;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

header {
  padding: 3rem 1.5rem 1.5rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 2rem;
}

header p {
  margin: 0;
  color: var(--muted);
}

main.grid {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.card {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--fg);
  transition: transform 0.1s ease, border-color 0.1s ease;
}

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

.card-icon {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.card h2 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.empty {
  text-align: center;
  color: var(--muted);
  grid-column: 1 / -1;
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.8rem;
}