:root{--ink:#1E212A;--ink-2:#363B46;--muted:#5F6673;--line:#E1E5EA;--mist:#F4F6F8;--teal:#217F8C;--teal-ink:#1B6974;--sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:#fff;color:var(--ink);font:400 17px/1.65 var(--sans);-webkit-font-smoothing:antialiased;caret-color:var(--teal)}
::selection{background:var(--teal);color:#fff}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:4px}
a{color:var(--teal-ink);text-underline-offset:.2em;text-decoration-thickness:1px}
a:hover{color:var(--ink)}
.wrap{max-width:820px;margin:0 auto;padding:0 clamp(16px,4vw,40px)}
.top{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:10}
.top__in{display:flex;justify-content:space-between;align-items:center;gap:16px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:700;font-size:19px;letter-spacing:-.03em}
.logo img{display:block;height:34px;width:auto}
.back{font-size:15px;font-weight:500}
.doc{padding:clamp(40px,7vw,72px) clamp(16px,4vw,40px) 96px}
h1{font-size:clamp(36px,5vw,52px);line-height:1.1;letter-spacing:-.035em;font-weight:650;margin:0}
.meta{color:var(--muted);margin:14px 0 36px;font-size:15px}
h2{font-size:24px;letter-spacing:-.02em;line-height:1.25;margin:52px 0 14px;scroll-margin-top:84px;font-weight:600}
h3{font-size:18px;margin:28px 0 8px;font-weight:600}
p,li{color:var(--ink-2);max-width:70ch}
p{margin:0 0 14px;text-wrap:pretty}
ul{padding-left:1.2em;margin:0 0 16px}
li{margin:6px 0}
li::marker{color:var(--teal)}
strong{color:var(--ink);font-weight:600}
.toc{background:var(--mist);border-radius:12px;padding:20px 24px;margin-bottom:8px}
.toc ol{margin:0;padding-left:1.4em;columns:2;column-gap:32px}
.toc li{margin:4px 0;break-inside:avoid;font-size:15px}
@media (max-width:640px){.toc ol{columns:1}}
.notice{border:1px solid var(--line);background:var(--mist);border-radius:12px;padding:18px 20px;margin:0 0 16px}
.notice p:last-child{margin:0}
.caps{font-weight:600;color:var(--ink)}
.foot{border-top:1px solid var(--line);padding:28px 0;font-size:14px;color:var(--muted)}