:root {
  --bg: #0f1420;
  --card: #171e2e;
  --border: #262f45;
  --text: #e8ecf5;
  --muted: #93a0b8;
  --accent: #4f8dfd;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --border: #e2e7f0;
    --text: #16202f;
    --muted: #5b6779;
    --accent: #2f6fed;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
header { padding: 60px 20px 20px; text-align: center; }
header h1 { font-size: 2.1rem; margin-bottom: 8px; }
header p { color: var(--muted); }
main { padding: 20px 20px 60px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease;
}
.card:hover { border-color: var(--accent); }
.card strong { font-size: 1.1rem; }
.card span { color: var(--muted); font-size: 0.9rem; }
footer { text-align: center; padding: 24px 0 40px; color: var(--muted); font-size: 0.85rem; }
footer a { color: var(--muted); }