:root { color-scheme: light dark; font: 18px/1.6 system-ui, sans-serif; }
body { margin: 0; }
main { max-width: 48rem; margin: 3rem auto; padding: 0 1.25rem 3rem; }
h1, h2 { line-height: 1.2; }
h2 { margin-top: 2rem; }
nav { margin-top: 2.5rem; }
a { text-underline-offset: .15em; }