:root{--bg:#fff;--fg:#1d2330;--muted:#5b6475;--line:#e3e7ee;--accent:#1f6feb;--soft:#f4f7fb;--warn:#fff4e0;--warnfg:#7a4b00}
@media (prefers-color-scheme:dark){:root{--bg:#10141c;--fg:#e8ecf3;--muted:#9aa5b8;--line:#263042;--accent:#6aa5ff;--soft:#171d29;--warn:#3a2d12;--warnfg:#ffd98a}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;line-height:1.8;font-size:16px}
a{color:var(--accent)}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:700;font-size:20px;letter-spacing:.02em;color:var(--fg);text-decoration:none}
.logo span{color:var(--accent)}
nav a{margin-left:20px;color:var(--muted);text-decoration:none;font-size:14px}
nav a:hover{color:var(--accent)}
.draft{background:var(--warn);color:var(--warnfg);font-size:13px;padding:8px 0;text-align:center}
.hero{padding:72px 0 48px}
.hero h1{text-wrap:balance;font-size:clamp(28px,5vw,42px);line-height:1.35;margin:0 0 20px}
.hero p{color:var(--muted);font-size:18px;max-width:640px;margin:0}
.btn{display:inline-block;margin-top:28px;padding:12px 24px;border-radius:8px;background:var(--accent);color:#fff;text-decoration:none;font-weight:600}
section{padding:40px 0;border-top:1px solid var(--line)}
section h2{font-size:22px;margin:0 0 20px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.card{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:20px}
.card h3{margin:0 0 8px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:15px}
.doc{padding-top:48px;padding-bottom:64px}
.doc h1{font-size:28px;margin:0 0 8px}
.doc .meta{color:var(--muted);font-size:14px;margin-bottom:32px}
.doc h2{font-size:20px;margin:36px 0 12px;padding-top:8px;border-top:1px solid var(--line)}
.doc h3{font-size:17px;margin:24px 0 8px}
.doc li{margin:4px 0}
table.info{border-collapse:collapse;width:100%;margin:16px 0}
table.info th,table.info td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top}
table.info th{background:var(--soft);width:30%;font-weight:600}
footer.site{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:14px}
footer.site a{color:var(--muted);margin-right:16px}
nav a{white-space:nowrap}
@media(max-width:640px){body{font-size:15px}
header.site .wrap{flex-direction:column;align-items:flex-start;height:auto;padding-top:12px;padding-bottom:10px;gap:6px}
nav{display:flex;flex-wrap:wrap;gap:4px 16px}
nav a{margin-left:0;font-size:13px}
.hero{padding:40px 0 28px}.hero p{font-size:16px}
.doc{padding-top:32px;padding-bottom:48px}.doc h1{font-size:24px}
table.info th{width:34%}
.draft{font-size:12px;padding:6px 12px}}