:root{color-scheme:dark;--bg:#0b1220;--card:#17243a;--card2:#111e31;--ink:#f4f5f2;--muted:#b6c5d0;--line:#34475c;--mint:#9cf0c5;--amber:#ffdb9b;--coral:#ffc1af;--blue:#a8d4f7}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 90% 0,#203350 0,transparent 27%),linear-gradient(160deg,#091120,#101c2e 72%,#0b1220);color:var(--ink);font:17px/1.66 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--mint);text-underline-offset:4px;overflow-wrap:anywhere}a:hover{color:#d3ffe5}.wrap{max-width:1080px;margin:0 auto;padding:30px 22px 100px}.top{display:flex;justify-content:space-between;gap:16px;align-items:center;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:20px}.brand{font-weight:900;letter-spacing:-.04em;font-size:25px;color:#fff;text-decoration:none}.brand span{color:var(--mint)}nav{display:flex;gap:18px;flex-wrap:wrap;font-size:14px}.tag,.eyebrow{font-size:12px;font-weight:800;letter-spacing:.11em;text-transform:uppercase;color:var(--mint)}.tag{display:inline-block;border:1px solid #54775f;border-radius:40px;padding:6px 11px}.eyebrow{margin-top:36px}.hero h1{font-size:clamp(40px,7vw,78px);line-height:1.07;letter-spacing:-.055em;max-width:900px;margin:16px 0 15px}.lead{font-size:21px;max-width:820px;color:#d5dee9}.muted,small{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.box,.card,.note{background:linear-gradient(145deg,var(--card),var(--card2));border:1px solid var(--line);border-radius:20px;padding:24px;margin:15px 0}.card h3{font-size:23px;line-height:1.25;margin:9px 0}.card .num{font-size:44px;font-weight:900;letter-spacing:-.04em;color:var(--mint)}.card a.head{font-size:23px;font-weight:800;line-height:1.25;display:inline-block;text-decoration:none}.card .head:hover{text-decoration:underline}.warn{border-left:4px solid var(--amber);background:#2b2630}.good{border-left:4px solid var(--mint)}.bad{border-left:4px solid var(--coral)}h2{font-size:clamp(25px,3vw,37px);line-height:1.24;letter-spacing:-.03em;margin:42px 0 14px}h3{font-size:22px;margin:23px 0 8px}p{margin:13px 0}ul,ol{padding-left:25px}li{margin:6px 0}strong{color:#fff}code{background:#233449;padding:2px 5px;border-radius:4px;white-space:normal}table{border-collapse:collapse;width:100%;font-size:15px}td,th{border-bottom:1px solid var(--line);text-align:left;padding:12px 8px;vertical-align:top}th{color:var(--mint);font-size:12px;letter-spacing:.05em;text-transform:uppercase}.scroll{overflow-x:auto}.btn{display:inline-block;background:var(--mint);color:#0a1830!important;text-decoration:none;font-weight:900;border-radius:11px;padding:13px 18px;margin:10px 10px 8px 0}.btn.alt{background:transparent;color:var(--mint)!important;border:1px solid var(--mint)}.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}.inputs{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.inputs label{font-weight:700;color:#d9e9e5;font-size:15px}.inputs input{margin-top:4px;width:100%;background:#0b1525;border:1px solid #506577;border-radius:9px;padding:12px;color:var(--ink);font-size:18px}output{font-size:24px;color:var(--mint);font-weight:850;display:block}blockquote{border-left:3px solid var(--blue);padding:4px 16px;color:#d9e4f0;background:#1a293e;margin:20px 0}.fine{font-size:13px;color:#aec2d0}.pill{display:inline-block;background:#294039;border-radius:20px;padding:3px 10px;font-size:12px;font-weight:700;color:#b5ffd5}.pill.unverified{background:#513b30;color:#ffd3b7}.problem{padding:15px 0;border-bottom:1px solid var(--line)}.problem b{font-size:17px}.problem .metadata{font-size:13px;color:var(--muted)}.problem summary{cursor:pointer;list-style:auto}.problem details{padding-top:8px}footer{border-top:1px solid var(--line);margin-top:50px;padding-top:24px;color:var(--muted);font-size:14px}@media(max-width:800px){.grid{grid-template-columns:1fr}.two{grid-template-columns:1fr}.hero h1{font-size:43px}.wrap{padding:20px 17px 70px}}@media(max-width:480px){.inputs{grid-template-columns:1fr}.lead{font-size:18px}}