:root{color-scheme:light;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#172033;background:#f8fafc}
*{box-sizing:border-box}
body{margin:0}
main{max-width:760px;margin:0 auto;padding:48px 24px 72px;line-height:1.65}
h1{font-size:clamp(1.8rem,4vw,2.5rem);line-height:1.2;margin:0 0 24px}
h2{font-size:1.25rem;margin:32px 0 8px}
p{margin:0 0 18px}
a{color:#0755a5;text-decoration-thickness:1px;text-underline-offset:3px}
a:focus-visible{outline:3px solid #e6a000;outline-offset:3px}
nav{display:flex;flex-wrap:wrap;gap:20px;margin:30px 0}
code{background:#e8eef7;border-radius:3px;padding:2px 4px}