:root{--sky:#0EA5E9;--sky-600:#0284C7;--sky-50:#F0F9FF;--ink:#0F172A;--slate-700:#334155;--slate-500:#64748B;--slate-200:#E2E8F0;--slate-100:#F1F5F9;--bg:#F8FAFC;--r:8px;--r-xl:20px;--font:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}a{color:var(--sky-600)}
.wrap{width:min(820px,100% - 40px);margin-inline:auto}
header.nav{background:rgba(248,250,252,.9);border-bottom:1px solid var(--slate-200);position:sticky;top:0;z-index:5;backdrop-filter:blur(12px)}
header.nav .bar{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.brand .mark{width:34px;height:34px;border-radius:var(--r);background:var(--sky);display:grid;place-items:center}
.brand .word{font-weight:900;font-size:1.3rem;letter-spacing:-.04em}.brand .word b{color:var(--sky)}
.back{font-size:.9rem;font-weight:700;text-decoration:none;color:var(--slate-700)}
main{padding-block:clamp(40px,6vw,72px)}
h1{font-size:clamp(1.9rem,4vw,2.6rem);font-weight:900;letter-spacing:-.03em;line-height:1.1}
h2{font-size:1.25rem;font-weight:900;letter-spacing:-.02em;margin:38px 0 12px;padding-top:18px;border-top:1px solid var(--slate-200)}
h3{font-size:1rem;font-weight:800;margin:20px 0 6px}
p,li{color:var(--slate-700)}p{margin:10px 0}
ul{margin:10px 0 10px 20px}li{margin:5px 0}
.updated{color:var(--slate-500);font-size:.88rem;margin-top:14px}
.box{background:#fff;border:1px solid var(--slate-200);border-radius:var(--r-xl);padding:22px 24px;margin:20px 0}
table{border-collapse:collapse;width:100%;margin:14px 0;font-size:.92rem}
th,td{border:1px solid var(--slate-200);padding:9px 11px;text-align:left;vertical-align:top}
th{background:var(--sky-50);font-weight:800;font-size:.8rem;letter-spacing:.04em;text-transform:uppercase;color:var(--sky-600)}
footer{border-top:1px solid var(--slate-200);background:#fff;padding:30px 0;font-size:.84rem;color:var(--slate-500);margin-top:60px}
footer .links{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:12px}footer a{font-weight:600}