body{font-family:Arial,sans-serif;margin:0;padding:0;box-sizing:border-box;background-color:#f5f5f5}h1{color:#333;text-align:center}a{text-decoration:none;color:#0070f3}a:hover{text-decoration:underline}button{font-size:16px;padding:12px;background-color:#0070f3;color:#fff;border:none;cursor:pointer}button:hover{background-color:#005bb5}.container{max-width:1200px;margin:0 auto;padding:20px}