:root{--ink:#1c2430;--muted:#5a6572;--bg:#fbfaf7;--card:#ffffff;--accent:#1f4e79;--line:#e3e0d8}
@media (prefers-color-scheme:dark){:root{--ink:#e8ebef;--muted:#a3adb9;--bg:#13181f;--card:#1a212b;--accent:#8fbbe6;--line:#2a3340}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent)}
header,main,footer{max-width:46rem;margin:0 auto;padding:0 1rem}
header{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;align-items:baseline;justify-content:space-between;padding-top:1.25rem;padding-bottom:1rem;border-bottom:1px solid var(--line)}
.brand{font-weight:700;letter-spacing:.01em;color:var(--ink);text-decoration:none}
nav a{margin-right:1rem;text-decoration:none}
nav a[aria-current]{font-weight:700;text-decoration:underline}
h1{font-size:2.1rem;line-height:1.2;margin:2.5rem 0 .75rem}
h2{font-size:1.25rem;margin:2.25rem 0 .5rem}
p{margin:.5rem 0 1rem}
.lead{font-size:1.25rem;color:var(--ink)}
.muted{color:var(--muted)}
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));margin:1rem 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem 1.1rem}
.card h3{margin:.1rem 0 .4rem;font-size:1.05rem}
.card p{margin:0}
footer{margin-top:3rem;padding-top:1rem;padding-bottom:2rem;border-top:1px solid var(--line);color:var(--muted);font-size:.95rem}
footer a{margin-left:.75rem}