:root{--bg:#FFFFFF;--bg2:#F5F5F7;--ink:#1D1D1F;--muted:#6E6E73;--rule:#D2D2D7;--link:#0066CC;--nav:rgba(250,250,252,.8)}
@media (prefers-color-scheme: dark){:root{--bg:#000000;--bg2:#161617;--ink:#F5F5F7;--muted:#A1A1A6;--rule:#38383A;--link:#2997FF;--nav:rgba(22,22,23,.8);color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic UI","Meiryo",sans-serif;font-size:17px;line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:var(--link)}
.in{max-width:720px;margin:0 auto}
.nav{position:sticky;top:0;background:var(--nav);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);padding:0 16px}
.nav .in{height:48px;display:flex;align-items:center}
.nav .brand{color:var(--ink);text-decoration:none;font-weight:600}
.doc{max-width:720px;margin:0 auto;padding:48px 16px 80px}
h1{font-size:clamp(30px,6vw,44px);line-height:1.2;margin:0 0 24px}
h2{font-size:21px;margin:40px 0 8px}
p{margin:0 0 12px}
dl{display:grid;grid-template-columns:auto 1fr;gap:12px 24px;margin:0;padding:20px 24px;background:var(--bg2);border-radius:18px}
dt{color:var(--muted);font-size:15px}
dd{margin:0;overflow-wrap:anywhere}
.date{color:var(--muted);font-size:14px;margin-top:32px}
.foot{background:var(--bg2);padding:24px 16px;font-size:12px;color:var(--muted)}
.foot nav{display:flex;flex-wrap:wrap;gap:4px 16px;margin-bottom:8px}
.foot a{color:var(--muted)}
.foot p{margin:0}