:root{color-scheme:light}*{box-sizing:border-box}body{margin:0;background:#f5f7fb;color:#17243b;font:16px/1.65 system-ui,-apple-system,"Segoe UI",Arial,sans-serif}header{background:#102448;color:white;padding:18px max(24px,calc((100vw - 850px)/2));display:flex;gap:28px;align-items:center;flex-wrap:wrap}header a{color:white;text-decoration:none}.brand{font-size:1.2rem;font-weight:750}nav{display:flex;gap:24px}main{max-width:850px;margin:48px auto;padding:0 24px}h1{font-size:clamp(2rem,5vw,3rem);line-height:1.15;margin:0 0 16px}h2{font-size:1.3rem;line-height:1.3;margin:0 0 12px}p{margin:0 0 12px}p:last-child{margin:0}.lead{font-size:1.15rem;color:#425472}section{background:white;border:1px solid #dce4f1;border-radius:12px;padding:24px;margin:22px 0;box-shadow:0 2px 10px #10244808}main a{color:#1557b2}footer{max-width:850px;margin:45px auto;padding:0 24px;color:#5a6a80;font-size:.9rem}@media(max-width:500px){main{margin-top:32px}section{padding:20px}}