body{font-family:"Open Sans",sans-serif;margin:0;background:#f5f5f5;color:#212121;}header{background:#009688;color:#fff;padding:22px;text-align:center;}nav{background:#4db6ac;display:flex;justify-content:center;gap:15px;padding:12px;}main{padding:36px;}section.block{background:#fff;border-radius:20px;box-shadow:0 6px 14px rgba(0,0,0,0.1);padding:24px;margin:24px;}h1{color:#00695c;font-size:2.2rem;}p{font-size:1.05rem;}hr{border:1px solid #009688;}footer{background:#009688;color:#fff;text-align:center;padding:20px;} ol{list-style:decimal;margin:20px auto;padding:20px;max-width:600px;background:#f9f9f9;box-shadow:inset 0 0 10px rgba(0,0,0,0.05);}