:root {
  --bg: #f8f9fa;
  --fg: #222;
  --card-bg: #fff;
  --muted: #666;
  --shadow: rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #eee;
    --card-bg: #1f1f1f;
    --muted: #aaa;
    --shadow: rgba(255, 255, 255, 0.05);
  }
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, sans-serif;
  text-align: center;
  padding: 2rem 1rem;
  line-height: 1.6;
}

h1 {
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
}

.lead {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  max-width: 960px;
  margin: 0 auto;
}

.card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  height: 100px;
  text-decoration: none;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 14px var(--shadow);
}

.card img {
  max-height: 60px;
  max-width: 100%;
}

footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--muted);
}

a {
  color: inherit;
}