:root{--ink:#14202b;--muted:#4b5b68;--line:#d9e0e5;--bg:#ffffff;--soft:#f3f6f8;--accent:#0b5f66}
*{box-sizing:border-box}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--accent)}
a:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
header,main,footer{max-width:44rem;margin:0 auto;padding:0 1.25rem}
header{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:.5rem 1.5rem;padding-top:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--line)}
.brand{font:700 1.15rem Charter,Georgia,serif;color:var(--ink);text-decoration:none}
nav a{margin-right:1.1rem;text-decoration:none}
nav a:hover{text-decoration:underline}
h1,h2{font-family:Charter,Georgia,serif;line-height:1.2}
h1{font-size:2.1rem;margin:2.5rem 0 .75rem}
h2{font-size:1.25rem;margin:2rem 0 .5rem}
.lead{font-size:1.15rem;color:var(--muted)}
.box{background:var(--soft);border-left:4px solid var(--accent);padding:1rem 1.25rem;margin:1.5rem 0}
.box p{margin:.25rem 0}
footer{margin-top:3rem;padding-top:1rem;padding-bottom:2rem;border-top:1px solid var(--line);color:var(--muted);font-size:.95rem}