*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#f5f4f2;--surface:#fff;--ink:#1a1a1a;--ink2:#4a4744;--muted:#8a857f;--line:#e4e1dc;--accent:#cc0000;--warn:#fff3c4}
@media (prefers-color-scheme: dark){
  :root{--bg:#0e0e0e;--surface:#181818;--ink:#f0ede8;--ink2:#c8c4be;--muted:#8f8a84;--line:#2a2a2a;--warn:#4a3b00}
}
body{background:var(--bg);color:var(--ink);font-family:'Segoe UI',system-ui,-apple-system,Arial,sans-serif;font-size:15px;line-height:1.6}
header.top{background:#0a0a0a;color:#fff;border-bottom:3px solid var(--accent)}
header.top .in{display:flex;align-items:center;gap:12px;height:60px;padding:0 24px}
.logo{width:36px;height:36px;border-radius:8px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:900;color:#fff;text-decoration:none}
.brand{font-weight:800;letter-spacing:.06em;font-size:16px;color:#fff;text-decoration:none}
main{max-width:780px;margin:0 auto;padding:28px 16px 40px}
.doc{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:28px 28px 32px}
h1{font-size:26px;line-height:1.25;margin-bottom:6px}
.sub{color:var(--muted);font-size:13px;margin-bottom:20px}
h2{font-size:17px;margin:26px 0 8px}
p,li{color:var(--ink2);margin-bottom:8px}
ol,ul{padding-left:22px}
a{color:var(--accent)}
.card{background:var(--bg);border-radius:8px;padding:12px 14px;margin:10px 0}
.card dl{display:grid;grid-template-columns:max-content 1fr;gap:2px 14px}
.card dt{color:var(--muted)}
.toc{columns:2;column-gap:24px;font-size:14px;margin:4px 0 8px}
.toc li{margin-bottom:2px}
.op-missing{background:var(--warn);border-radius:4px;padding:0 4px;font-family:ui-monospace,Menlo,monospace;font-size:13px}
footer{color:var(--muted);font-size:12px;text-align:center;padding:0 16px 28px}
footer a{color:inherit}
@media (max-width:600px){ .doc{padding:20px 16px} .toc{columns:1} h1{font-size:22px} }
@media print{ header.top,footer{display:none} body{background:#fff} .doc{border:none;padding:0} }