:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#172b46;background:#f5f9ff;line-height:1.65}
*{box-sizing:border-box}
body{margin:0}
header{background:white;border-bottom:1px solid #dde7f3;padding:20px max(24px,calc((100% - 820px)/2));display:flex;justify-content:space-between;align-items:center;gap:15px;flex-wrap:wrap}
header>a{font-weight:750;font-size:21px;text-decoration:none;color:#126fc9}
a{color:#0877d7}
nav{font-size:14px}
main{max-width:820px;margin:55px auto 70px;padding:0 24px}
h1{font-size:clamp(32px,5vw,46px);line-height:1.2}
h2{font-size:22px}
.lead{font-size:19px;color:#52667d}
section{background:white;border:1px solid #dde7f3;border-radius:16px;padding:25px 30px;margin-top:25px;box-shadow:0 5px 20px #153b6410}
li{margin:12px 0}
footer{border-top:1px solid #dde7f3;text-align:center;padding:24px;color:#52667d}