:root{--bg:#ffffff;--fg:#1f2937;--muted:#6b7280;--line:#e5e7eb;--accent1:#4338CA;--accent2:#C026D3}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;line-height:1.8}
.wrap{max-width:720px;margin:0 auto;padding:0 24px 80px}
header{padding:20px 0;border-bottom:1px solid var(--line);margin-bottom:40px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;text-decoration:none;color:var(--fg)}
.brand img{width:28px;height:28px;border-radius:7px}
h1{font-size:28px;font-weight:800;margin-bottom:8px}
.updated{color:var(--muted);font-size:13px;margin-bottom:40px}
h2{font-size:19px;margin-top:36px}
p,li{color:#374151;font-size:15px}
a.back{color:var(--muted);font-size:13px;text-decoration:none}