:root { color-scheme: light dark; font-family: system-ui, sans-serif; line-height: 1.8; }
body { max-width: 48rem; margin: auto; padding: 2rem 1.5rem; }
nav { display: flex; gap: 1.5rem; flex-wrap: wrap; padding-bottom: 1rem; border-bottom: 1px solid #888; }
a { color: light-dark(#154c96, #91bfff); }
h1 { line-height: 1.3; margin-top: 2rem; }
h2 { font-size: 1.25rem; margin-top: 2rem; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid #888; font-size: .9rem; }