body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
 max-width:44rem;margin:0 auto;padding:4rem 1.5rem;line-height:1.7;
 color:#1a1a1a;background:#fafafa}
h1{font-size:1.9rem;font-weight:600;letter-spacing:-.01em;margin-bottom:.4rem}
p.lead{color:#555;font-size:1.05rem;margin-top:0}
nav{margin-top:3rem;border-top:1px solid #ddd;padding-top:1.5rem}
nav a{color:#1a4d8f;text-decoration:none;margin-right:1.8rem}
nav a:hover{text-decoration:underline}
footer{margin-top:4rem;color:#888;font-size:.85rem}