:root{--ink:#1e1e1e;--teal:#519aa1;--teal-text:#2f6f75;--teal-tint:#e6f1f2;--surface:#f6f6f5;--line:#e2e2e2;--muted:#6b6b6b;--warn:#fdf3e1;--font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
*{box-sizing:border-box}html,body{margin:0}
body{font-family:var(--font);color:var(--ink);background:var(--surface);font-size:16px;line-height:1.65;min-height:100vh}
a{color:var(--teal-text)}
.top{background:var(--ink)}.top .in{max-width:860px;margin:0 auto;padding:14px 16px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.wm{font-weight:800;text-transform:uppercase;letter-spacing:-.01em;font-size:17px;color:#fff;text-decoration:none;white-space:nowrap}.wm span{color:var(--teal)}
.top a.back{color:#cfcfcf;font-size:14px;text-decoration:none}.top a.back:hover{color:#fff}
main{max-width:860px;margin:0 auto;padding:32px 16px 64px}
article{background:#fff;border:1px solid var(--line);border-radius:10px;padding:32px}
h1{font-size:30px;line-height:1.2;margin:0 0 8px;letter-spacing:-.01em}
.meta{color:var(--muted);font-size:14px;margin:0 0 24px}
h2{font-size:20px;margin:32px 0 8px;padding-top:8px;border-top:1px solid var(--line)}
h3{font-size:16px;margin:20px 0 6px}
p,li{max-width:72ch}ul{padding-left:20px}li{margin:4px 0}
table{border-collapse:collapse;width:100%;margin:12px 0;font-size:14px}th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}th{background:var(--surface);font-weight:600}
.scroll{overflow-x:auto}
.toc{background:var(--teal-tint);border-radius:8px;padding:14px 18px;font-size:14px}.toc ol{margin:6px 0 0;padding-left:20px}
.key{background:var(--warn);border-radius:8px;padding:12px 16px;font-size:15px}
footer{max-width:860px;margin:0 auto;padding:0 16px 32px;font-size:13px;color:var(--muted)}
@media(max-width:600px){article{padding:20px}h1{font-size:26px}}
@media print{.top,footer{display:none}article{border:0;padding:0}body{background:#fff}}