:root{color-scheme:light;--ink:#17243b;--muted:#536278;--line:#dfe5ee;--accent:#245fc6;--paper:#fff;--bg:#f4f7fb}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 system-ui,-apple-system,"Segoe UI",sans-serif}header,main,footer{max-width:920px;margin:auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{color:var(--ink);font-size:23px;font-weight:800;text-decoration:none;letter-spacing:.07em}nav{display:flex;flex-wrap:wrap;gap:18px}a{color:var(--accent);text-underline-offset:3px}nav a{font-size:14px}main{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:42px;margin-top:16px}h1{font-size:34px;line-height:1.25;margin:0 0 16px}h2{font-size:21px;line-height:1.4;margin-top:32px}p,ul{margin:12px 0}.eyebrow,.updated{color:var(--muted);font-size:14px}.eyebrow{font-weight:700;letter-spacing:.08em;text-transform:uppercase}.notice{padding:16px 20px;border-left:3px solid var(--accent);background:#f1f6ff}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.button{display:inline-block;padding:10px 18px;border:1px solid var(--accent);border-radius:8px;text-decoration:none}footer{color:var(--muted);font-size:13px}details{border-top:1px solid var(--line);padding-top:18px;margin-top:28px}summary{cursor:pointer;font-weight:600}@media(max-width:640px){header{align-items:flex-start;flex-direction:column}main{margin:8px 14px;padding:26px 22px}h1{font-size:28px}}