:root { color-scheme: light dark; }
body { margin: 0; font: 16px/1.6 -apple-system, system-ui, Segoe UI, Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 20px 80px; }
h1 { font-size: 2rem; margin: 0 0 .25rem; }
h2 { margin-top: 2rem; }
.lede { font-size: 1.15rem; }
.muted { color: #64748b; font-size: .9rem; }
code { background: rgba(127,127,127,.15); padding: .1em .35em; border-radius: 4px; }