:root{color-scheme:light;--ink:#20332e;--muted:#53655f;--accent:#20624f;--line:#d4ded7;--paper:#fafbf7}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;font-size:17px;line-height:1.9}
a{color:var(--accent);text-underline-offset:.22em;text-decoration-thickness:1px}
a:hover{color:#103d30;text-decoration-thickness:2px}
a:focus-visible{outline:3px solid #c88318;outline-offset:5px;border-radius:2px}
header,main,footer{width:min(100% - 56px,880px);margin-inline:auto}
header{padding:29px 0 24px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}
.brand{font-size:16px;font-weight:750;text-decoration:none;letter-spacing:.025em}.brand span{display:block;font-weight:400;color:var(--muted);font-size:13px;letter-spacing:.08em;line-height:1.5}
nav{display:flex;flex-wrap:wrap;gap:10px 20px;font-size:14px}nav a[aria-current=page]{font-weight:700}
main{padding:68px 0 48px}.eyebrow{font-size:12px;letter-spacing:.13em;color:var(--muted);font-weight:650;margin:0 0 22px}
h1{font-size:clamp(30px,4.5vw,46px);line-height:1.5;letter-spacing:.005em;font-weight:700;margin:0 0 25px}
.lead{font-size:19px;line-height:1.95;margin:0 0 52px;color:#3e554c;max-width:750px}
section{border-top:1px solid var(--line);padding:28px 0 16px}h2{font-size:21px;line-height:1.6;margin:0 0 15px}p{margin:0 0 17px}
code{font-size:.85em;overflow-wrap:anywhere;background:#eaf0e9;padding:2px 5px;border-radius:3px}
.document{max-width:800px}.document h1{font-size:clamp(29px,4.2vw,39px)}.document .lead{font-size:18px;margin-bottom:38px}.back{margin-top:24px}
footer{border-top:1px solid var(--line);padding:23px 0 36px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}footer p{margin:0}
@media(max-width:560px){body{font-size:16px}header,main,footer{width:calc(100% - 36px)}header{align-items:flex-start;flex-direction:column;gap:17px}main{padding-top:43px}.lead{font-size:18px;margin-bottom:35px}h1 br{display:none}section{padding-top:23px}}