:root{color-scheme:dark;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:#101323;color:#eef0ff;line-height:1.7}*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:880px;margin:auto;padding:24px}header{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;border-bottom:1px solid #343854}nav{display:flex;gap:20px}a{color:#b9b6ff;text-underline-offset:4px}.brand{font-weight:750;text-decoration:none;color:#fff}main{padding-top:60px;padding-bottom:60px}h1{font-size:clamp(32px,6vw,54px);line-height:1.15;margin:16px 0 30px}h2{font-size:22px;margin-top:32px}p{max-width:72ch}.tag{color:#9fa8e8;font-size:13px;letter-spacing:.1em}.notice{border-left:3px solid #8e86ef;background:#1c2037;padding:18px 24px;border-radius:4px}footer{color:#b4b9d4;font-size:14px;border-top:1px solid #343854}details{border-top:1px solid #343854;margin-top:32px;padding-top:20px}summary{cursor:pointer;color:#b9b6ff}@media(max-width:500px){header,main,footer{padding:20px}main{padding-top:36px}nav{gap:15px}}