:root{--ink:#1a1a1a;--muted:#5a5f66;--line:#e2e5e9;--bg:#ffffff;--accent:#0b6b4f;--accent-weak:#e7f2ee;--warn:#8a5a00;--closed:#6b6b6b}
*{box-sizing:border-box}
html{font-family:system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;color:var(--ink);line-height:1.7}
body{margin:0;background:var(--bg)}
a{color:var(--accent)}
main{max-width:960px;margin:0 auto;padding:1.5rem 1rem 3rem}
header.site{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;align-items:baseline;max-width:960px;margin:0 auto;padding:1rem}
header.site .brand{font-weight:700;font-size:1.1rem;text-decoration:none}
header.site nav a{margin-right:1rem;font-size:.95rem}
nav.breadcrumb{max-width:960px;margin:0 auto;padding:.25rem 1rem;color:var(--muted);font-size:.85rem}
nav.breadcrumb a{color:var(--muted)}
h1{font-size:1.6rem;line-height:1.35}
h2{font-size:1.2rem;margin-top:2rem;border-bottom:2px solid var(--accent-weak);padding-bottom:.25rem}
.lead{color:var(--muted)}
.badge{display:inline-block;font-size:.75rem;font-weight:700;padding:.15rem .5rem;border-radius:999px}
.badge.open{background:var(--accent-weak);color:var(--accent)}
.badge.soon{background:#fdf1dc;color:var(--warn)}
.badge.closed{background:#eee;color:var(--closed)}
ul.cards{list-style:none;padding:0;display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.card{border:1px solid var(--line);border-radius:10px;padding:1rem}
.card h3{font-size:1rem;margin:.4rem 0}
.card .ext{font-size:.75rem;color:var(--muted)}
dl.meta{margin:0;font-size:.85rem;color:var(--muted)}
dl.meta div{display:flex;gap:.5rem}
dl.meta dt{min-width:3.5rem;font-weight:600}
dl.meta dd{margin:0}
dl.dataset-summary{display:grid;grid-template-columns:9rem 1fr;margin:1rem 0;border:1px solid var(--line);border-radius:10px;overflow:hidden;font-size:.9rem}
dl.dataset-summary dt{font-weight:600;background:#f7f9fa;padding:.5rem .75rem;border-top:1px solid var(--line)}
dl.dataset-summary dd{margin:0;padding:.5rem .75rem;border-top:1px solid var(--line)}
dl.dataset-summary dt:first-of-type,dl.dataset-summary dd:first-of-type{border-top:0}
table.spec{border-collapse:collapse;width:100%}
table.spec th,table.spec td{border:1px solid var(--line);padding:.5rem .75rem;text-align:left;vertical-align:top}
table.spec th{background:#f7f9fa;white-space:nowrap;width:9rem}
table.spec .hint{color:var(--muted);font-size:.8rem;font-weight:400;margin-left:.35rem}
.chips{display:flex;flex-wrap:wrap;gap:.5rem}
.chip{display:inline-flex;gap:.4rem;align-items:center;border:1px solid var(--line);border-radius:999px;padding:.25rem .75rem;text-decoration:none;font-size:.85rem}
.chip .count{color:var(--muted);font-size:.75rem}
.body-text{white-space:pre-wrap;background:#fafbfc;border:1px solid var(--line);border-radius:8px;padding:1rem}
.catch{font-weight:600}
.code{color:var(--muted);font-size:.85rem;margin:0}
.detail-head{display:flex;gap:.75rem;align-items:center}
.closed-guide,.faq dt{font-weight:600}
.closed-guide{background:#f7f7f7;border-left:4px solid var(--closed);padding:.75rem 1rem;border-radius:4px}
.ymyl{background:var(--accent-weak);padding:.75rem 1rem;border-radius:8px}
.byline{font-size:.85rem;color:var(--muted);background:#fafbfc;border:1px solid var(--line);border-radius:8px;padding:.6rem .9rem;margin:.5rem 0 1.25rem}
.byline a{color:var(--accent)}
.byline-date{display:inline-block;margin-top:.15rem}
ul.axis-index{list-style:none;padding:0;display:grid;gap:.4rem;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
ul.axis-index .count{color:var(--muted);font-size:.8rem}
.cta{display:inline-block;background:var(--accent);color:#fff;padding:.6rem 1.2rem;border-radius:8px;text-decoration:none;font-weight:700}
.hero{padding:1rem 0 2rem}
.faq dd{margin:0 0 1rem;color:var(--muted)}
footer.site{max-width:960px;margin:2rem auto 0;padding:1.5rem 1rem;border-top:1px solid var(--line);font-size:.85rem;color:var(--muted)}
footer.site nav a{margin-right:1rem}
footer.site .note{font-size:.8rem}
.notfound{max-width:720px}
.notfound-nav{list-style:none;padding:0;margin:1rem 0 0;display:grid;gap:.5rem}
.notfound-nav li{border:1px solid var(--line);border-radius:8px;padding:.6rem .8rem}
.notfound-nav a{font-weight:700;color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}