:root { color-scheme: light dark; font-family: system-ui, sans-serif; line-height: 1.65; }
body { margin: 0; }
main { max-width: 48rem; padding: 2rem 1.25rem; margin: auto; }
h1, h2 { line-height: 1.25; }
a { color: light-dark(#174db3, #91b9ff); }
.muted { opacity: .75; font-size: .9rem; }