body{font-family:"Verdana",sans-serif;margin:0;background:#f5f6fa;color:#2d3436;}header{background:#0984e3;color:#fff;padding:22px;text-align:center;}nav{background:#74b9ff;display:flex;justify-content:center;gap:20px;padding:12px;}main{padding:32px;}section.block{background:#fff;border-radius:16px;box-shadow:0 4px 12px rgba(0,0,0,0.15);padding:24px;margin:20px;}h1{color:#0a3d62;font-size:2.5rem;}p{font-size:1.1rem;}hr{border:1px solid #0984e3;}footer{background:#0984e3;color:#fff;text-align:center;padding:18px;} ol{list-style-type:decimal;background:#ffffff;padding:20px;border-radius:12px;box-shadow:0 4px 10px rgba(0,0,0,0.15);}