*{box-sizing:border-box}body{margin:0;background:#f6f8fc;color:#172033;font:17px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}header,main,footer{width:min(880px,100% - 40px);margin:auto}header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:28px 0;border-bottom:1px solid #d8e1ef}.brand{font-size:22px;font-weight:750;text-decoration:none;color:#172033}nav{display:flex;gap:20px;flex-wrap:wrap}a{color:#2257a7;text-underline-offset:3px}a:focus-visible{outline:3px solid #2257a7;outline-offset:5px}main{padding:36px 0 42px}h1{font-size:clamp(32px,6vw,48px);line-height:1.15;margin:0 0 18px}h2{font-size:23px;line-height:1.3;margin:32px 0 10px}p{margin:12px 0}.lead{font-size:20px;color:#394961}.muted,footer{color:#5c6980}.note{background:#eaf2ff;border-left:4px solid #2f6fd6;padding:20px;border-radius:4px}.button{display:inline-block;background:#2257a7;color:white;padding:12px 22px;border-radius:8px;font-weight:650;text-decoration:none}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:28px 0}.card{background:white;border:1px solid #d8e1ef;border-radius:8px;padding:18px}.card h2{font-size:19px;margin:0 0 8px}.card p{margin:0}footer{padding:24px 0 36px;border-top:1px solid #d8e1ef;font-size:14px}@media(max-width:460px){header{align-items:flex-start;flex-direction:column;gap:8px}nav{gap:14px}}