:root{color-scheme:light dark;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.55}
body{margin:0;padding:3rem 1.25rem}
main{max-width:40rem;margin:0 auto}
h1{font-size:1.9rem;margin:0 0 1rem}
h2{font-size:1.15rem;margin:1.75rem 0 .5rem}
a{color:#2563eb}