body{font:18px/1.7 system-ui;color:#243246;background:#f5f7fa;margin:0}main{max-width:850px;margin:8vh auto;padding:32px}a{color:#245d84}nav{display:flex;gap:24px}h1{font-size:clamp(32px,7vw,60px);line-height:1.1}section{background:white;padding:24px;border-radius:16px;margin:24px 0}footer{font-size:14px;color:#596879}