:root { color-scheme: light; }
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;max-width:44rem;
     margin:0 auto;padding:2.5rem 1.25rem;color:#1d1d1f;line-height:1.6}
h1{font-size:1.6rem;margin-bottom:.25rem} h2{font-size:1.15rem;margin-top:2rem}
a{color:#2563eb} .muted{color:#6b7280;font-size:.9rem}
footer{margin-top:3rem;border-top:1px solid #e5e7eb;padding-top:1rem;font-size:.9rem}
nav a{margin-right:1rem}