:root{--blue:#185f9d;--ink:#172535;--muted:#667585;--line:#d9e5ef;--page:#f1f7fb}*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--ink);font:16px/1.55 Segoe UI,Arial,sans-serif}header,main,footer{max-width:900px;margin:auto;padding:22px}header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}header a{color:var(--blue);font-weight:800;text-decoration:none}main{background:#fff;margin-top:24px;border:1px solid var(--line);border-radius:18px;padding:30px;box-shadow:0 12px 35px #185f9d10}h1,h2{color:var(--blue)}h1{margin-top:0}a{color:var(--blue)}.note{padding:13px;border-left:4px solid var(--blue);background:#eef6fc;border-radius:8px}.small,footer{color:var(--muted);font-size:13px}li{margin:7px 0}@media(max-width:600px){header{align-items:flex-start;gap:12px;flex-direction:column}main{margin:12px;border-radius:14px;padding:20px}footer{padding:18px}}