:root {
  --bg: #fafaf8;
  --fg: #222;
  --muted: #666;
  --accent: #2d5a3d;
  --border: #ddd;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  margin: 0;
  line-height: 1.6;
}
header {
  background: var(--accent);
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
}
header h1 { margin: 0; font-size: 1.6rem; }
header p { margin: 0.25rem 0 0; opacity: 0.85; font-size: 0.95rem; }
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}
nav.card-list { display: grid; gap: 1rem; }
a.card {
  display: block;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: inherit;
}
a.card:hover { border-color: var(--accent); }
a.card h2 { margin: 0 0 0.35rem; font-size: 1.15rem; color: var(--accent); }
a.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
h2 { font-size: 1.25rem; margin-top: 2rem; }
footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding-top: 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}
footer a { color: var(--muted); }