body{margin:0;background:#f7f6f1;color:#102a3b;font:18px/1.7 Arial,sans-serif}header,main,footer{max-width:850px;margin:auto;padding:24px}header{border-bottom:3px solid #ff651b}a{color:#075477}h1{font-size:clamp(2rem,5vw,3rem);line-height:1.15}img,video{max-width:100%;height:auto}table{display:block;overflow:auto}blockquote{border-left:4px solid #ff651b;padding-left:20px}h2,h3{line-height:1.3;margin-top:2em}nav{display:flex;gap:24px;flex-wrap:wrap}