:root{--fg:#1a1a1a;--muted:#666;--accent:#2563eb;--bg:#fff;--line:#e5e7eb}
*{box-sizing:border-box}
body{font-family:-apple-system,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;
  color:var(--fg);background:var(--bg);line-height:1.8;margin:0}
.wrap{max-width:760px;margin:0 auto;padding:24px 20px 80px}
header.site{border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff}
header.site .wrap{padding:16px 20px}
header.site a{font-weight:700;font-size:18px;color:var(--fg);text-decoration:none}
.pr{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;font-size:13px;
  padding:8px 12px;border-radius:8px;margin:16px 0}
h1{font-size:28px;line-height:1.4;margin:8px 0 16px}
h2{font-size:23px;margin:40px 0 12px;padding-bottom:6px;border-bottom:2px solid var(--line)}
h3{font-size:19px;margin:28px 0 10px}
p{margin:14px 0}
a{color:var(--accent)}
table{border-collapse:collapse;width:100%;margin:18px 0;font-size:15px}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left}
th{background:#f9fafb}
blockquote{border-left:4px solid var(--accent);background:#f8fafc;margin:16px 0;
  padding:10px 16px;color:var(--muted)}
ul,ol{padding-left:1.4em}
.meta{color:var(--muted);font-size:14px}
.card{display:block;border:1px solid var(--line);border-radius:10px;padding:16px;
  margin:14px 0;text-decoration:none;color:var(--fg)}
.card:hover{border-color:var(--accent)}
.card .t{font-weight:700;font-size:17px}
.card .d{color:var(--muted);font-size:14px;margin-top:6px}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;
  margin-top:60px}
footer .wrap{padding:24px 20px}