:root{--bg:#e9efee;--surface:#f8fbfa;--ink:#17262f;--muted:#55666e;--line:#c7d3d1;--net:#0d6b57;--focus:#0d6b57;color-scheme:light;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#111b20;--surface:#18252c;--ink:#e4ecea;--muted:#9cafb2;--line:#2d3f46;--net:#4cc3a3;--focus:#4cc3a3;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#111b20;--surface:#18252c;--ink:#e4ecea;--muted:#9cafb2;--line:#2d3f46;--net:#4cc3a3;--focus:#4cc3a3;color-scheme:dark}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:17px;line-height:1.6}
a{color:var(--net)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:1080px;margin:0 auto;padding:24px 20px 64px}
.brand{display:inline-block;font-weight:800;letter-spacing:-.02em;font-size:1.1rem;color:var(--ink);text-decoration:none;margin-bottom:28px}
.brand b{color:var(--net)}
h1{font-size:clamp(2rem,5vw,3rem);line-height:1.05;letter-spacing:-.03em;font-weight:800;margin:0 0 14px}
.doc{max-width:720px}
.doc h2{font-size:1.35rem;letter-spacing:-.01em;margin:36px 0 8px}
.doc p,.doc li{margin:0 0 12px}
.updated{color:var(--muted);font-size:.9rem}
.fill{background:#ffe9a8;color:#3a2a00;padding:0 4px;border-radius:3px}
footer{margin-top:64px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}
footer nav{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:8px}
footer a{color:var(--muted)}