:root{
  color-scheme:dark;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;
  background:#0a0a0a;
  color:#f5f5f5;
}
*{box-sizing:border-box}
body{margin:0;background:#0a0a0a;color:#f5f5f5}
main{width:min(860px,calc(100% - 32px));margin:0 auto;padding:56px 0 72px}
header{margin-bottom:36px;padding-bottom:24px;border-bottom:1px solid #252525}
.eyebrow{margin:0 0 10px;color:#8f8f8f;font-size:12px;letter-spacing:.12em;text-transform:uppercase}
h1{margin:0;font-size:clamp(28px,5vw,42px);line-height:1.15}
.updated{margin:14px 0 0;color:#8f8f8f;font-size:13px}
section{margin:30px 0}
h2{margin:0 0 12px;font-size:20px}
p,li{color:#d3d3d3;line-height:1.8}
ul{padding-left:1.4em}
.note{padding:16px 18px;border:1px solid #2b2b2b;border-radius:12px;background:#111}
footer{margin-top:48px;padding-top:24px;border-top:1px solid #252525;color:#777;font-size:12px}
a{color:#fff}