body{font-family:Arial,sans-serif;margin:0;padding:0;background-color:#f4f4f4}h1{color:#333}nav{background-color:#333;padding:10px}nav ul{list-style:none;padding:0}nav ul li{display:inline;margin-right:20px}nav ul li a{color:#fff;text-decoration:none;font-size:18px}nav ul li a:hover{color:#f1c40f}button{padding:10px 20px;background-color:#3498db;color:#fff;border:none;border-radius:5px;cursor:pointer}button:hover{background-color:#2980b9}form{max-width:400px;margin:0 auto;background:#fff;padding:20px;border-radius:10px;box-shadow:0 4px 8px #0000001a}form input{width:100%;padding:10px;margin:10px 0;border:1px solid #ccc;border-radius:5px}form label{display:block;margin-bottom:5px}.container{padding:20px;max-width:1000px;margin:0 auto}.main-container{padding-top:80px}