:root {
  color-scheme: light dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
body { margin: 0; background: #0f1115; color: #f5f7fa; }
main { max-width: 860px; margin: 0 auto; padding: 48px 24px 72px; }
h1, h2 { line-height: 1.2; }
a { color: #8ab4f8; }
.card { background: #171a21; border: 1px solid #2a2f3a; border-radius: 14px; padding: 24px; margin: 24px 0; }
.muted { color: #b8c0cc; }
footer { margin-top: 48px; padding-top: 24px; border-top: 1px solid #2a2f3a; color: #b8c0cc; font-size: .95rem; }
nav { display: flex; gap: 16px; flex-wrap: wrap; margin: 20px 0 32px; }