:root{font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.6;color:#18202a;background:#f7f8fa;--surface:#fff;--border:#dfe4ea;--accent:#1d5f74;--muted:#5f6b78}
*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-underline-offset:.18em}.wrap{width:min(calc(100% - 2rem),860px);margin:auto}header,footer{background:var(--surface);border-color:var(--border)}header{border-bottom:1px solid var(--border)}footer{border-top:1px solid var(--border);margin-top:3rem}header .wrap,footer .wrap{padding:1.2rem 0}.brand{font-size:1.25rem;font-weight:750;color:inherit;text-decoration:none}nav{display:flex;flex-wrap:wrap;gap:.75rem 1rem;margin-top:.7rem}main{padding:2.4rem 0 1rem}h1,h2{line-height:1.25}h1{margin-top:0;font-size:clamp(2rem,7vw,3rem)}h2{margin-top:2rem;font-size:1.35rem}p,li{max-width:75ch}.card{background:var(--surface);border:1px solid var(--border);border-radius:.75rem;padding:1.2rem;margin:1rem 0}.warning{background:#fff7d6;border:1px solid #c99b00;border-radius:.5rem;padding:1rem}.meta,.muted{color:var(--muted);font-size:.95rem}.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.5rem;z-index:10}