:root { --fg:#222; --muted:#777; --bg:#fafafa; }
* { box-sizing:border-box; }
body { margin:0; font:16px/1.6 Georgia,serif; color:var(--fg); background:var(--bg); }
header, main, footer { max-width:720px; margin:0 auto; padding:1rem 1.25rem; }
header { border-bottom:1px solid #ddd; display:flex; justify-content:space-between; align-items:baseline; gap:1rem; flex-wrap:wrap; }
h1 { font-size:1.3rem; margin:0; }
nav a { margin-left:.75rem; color:#045; text-decoration:none; }
footer { border-top:1px solid #ddd; color:var(--muted); }