:root { color-scheme: light dark; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.6; }
body { margin: 0; }
main, footer { max-width: 46rem; margin: auto; padding: 1.5rem; }
main { padding-top: 3rem; }
h1 { line-height: 1.2; }
h2 { margin-top: 2rem; }
a { color: #2769d9; }
footer { color: #666; font-size: .9rem; }