body{font-family:"Roboto",sans-serif;margin:0;background:#ecf0f1;color:#2d3436;}header{background:#00b894;color:#fff;padding:26px;text-align:center;}nav{background:#55efc4;display:flex;justify-content:center;gap:20px;padding:12px;}main{padding:36px;}section.block{background:#fff;border-radius:18px;box-shadow:0 8px 20px rgba(0,0,0,0.12);padding:28px;margin:22px;}h1{color:#00695c;font-size:2.4rem;}p{line-height:1.6;}hr{border:1px solid #00b894;}footer{background:#00b894;color:#fff;text-align:center;padding:20px;} ol{list-style:decimal-leading-zero;color:#222;font-size:1.1rem;background:#e0f7fa;padding:18px;border-radius:6px;}