*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Hiragino Sans","Noto Sans JP",sans-serif;line-height:1.7;color:#222;background:#fff}
main,.site-header,.site-footer{max-width:760px;margin:0 auto;padding:0 16px}
.site-header{padding-top:12px;padding-bottom:12px;border-bottom:1px solid #eee}
.logo{font-weight:700;font-size:1.2rem;color:#222;text-decoration:none}
h1{font-size:1.4rem;margin:24px 0 12px}
h2{font-size:1.1rem;margin:24px 0 8px}
a{color:#0a58ca}
.notice{background:#f6f8fa;border-left:4px solid #0a58ca;padding:8px 12px}
.site-footer{margin-top:48px;padding-top:16px;padding-bottom:32px;border-top:1px solid #eee;font-size:.85rem;color:#555}
.site-footer p{margin:4px 0}