:root{--text:#222;--muted:#666;--line:#ddd;--soft:#f7f7f7;--link:#0645ad}
*{box-sizing:border-box}
body{margin:0;color:var(--text);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,Arial,sans-serif;-webkit-font-smoothing:antialiased;line-height:1.7;font-size:15px}
a{color:var(--link)}
.site{max-width:980px;margin:0 auto;padding:0 24px}
header{border-bottom:1px solid #bdbdbd}
.header-inner{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{color:var(--text);text-decoration:none;font-weight:700;display:flex;align-items:center;gap:10px}
.avatar{width:34px;height:34px;border-radius:50%;object-fit:cover;border:0}
nav{display:flex;gap:18px;font-size:13px}
nav a{color:var(--muted);text-decoration:none;padding:4px 0}
nav a:hover{color:var(--text);text-decoration:underline}
nav a.active{color:var(--text);font-weight:600}
main.site{padding-bottom:72px}
.page-intro{padding:56px 0 38px;border-bottom:1px solid var(--line)}
.page-intro h1{font-size:clamp(28px,5vw,44px);line-height:1.2;margin:0 0 8px;letter-spacing:-.04em}
.page-intro p{margin:0;color:var(--muted)}
section{padding:38px 0;border-bottom:1px solid var(--line)}
h2{font-size:22px;margin:0 0 18px}
h3,.item h2{font-size:17px;margin:0 0 8px}
h3 a,.item h2 a{color:inherit;text-decoration:none}
h3 a:hover,.item h2 a:hover{color:var(--link);text-decoration:underline}
.facts{display:grid;grid-template-columns:160px 1fr;border-top:1px solid #bdbdbd}
.facts dt,.facts dd{margin:0;padding:10px 12px;border-bottom:1px solid #bdbdbd}
.facts dt{background:var(--soft);font-weight:600}
.facts dd{color:#333}
.list{border-top:1px solid var(--line)}
.item{padding:20px 0;border-bottom:1px solid var(--line)}
.item:last-child{border-bottom:none}
.item-meta{color:var(--muted);font-size:13px;margin-bottom:6px}
.item p{margin:5px 0;color:#444}
.powerpoint{display:block;width:100%;aspect-ratio:16/9;height:auto;max-height:550px;margin:18px 0;border:1px solid var(--line);border-radius:4px;background:var(--soft)}
.checklist{margin:10px 0 0;padding-left:20px}
.tag{display:inline-block;background:var(--soft);border:0;border-radius:3px;color:var(--muted);font-size:12px;padding:1px 7px;margin:8px 5px 0 0}
.back{display:inline-block;margin-top:24px;font-size:14px}
.home-about{padding-top:24px}
.home-contents{padding-top:24px}
.home-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px}
.home-links p{display:flex;align-items:center;gap:10px;margin:12px 0}
.home-links img{width:20px;height:20px;flex-shrink:0}
footer.site{padding-top:24px;padding-bottom:48px;color:var(--muted);font-size:12px;border-top:1px solid var(--line)}
@media(max-width:640px){
.site{padding:0 16px}
.header-inner{align-items:flex-start;flex-direction:column;padding-top:16px;padding-bottom:16px;gap:8px}
nav{gap:12px;flex-wrap:wrap}
.page-intro{padding:42px 0 30px}
.facts{grid-template-columns:1fr}
.facts dt{border-bottom:0;padding-bottom:2px}
.facts dd{padding-top:0}
.home-links{grid-template-columns:1fr}
}