body{margin:0;padding:0;font-family:Arial,sans-serif}h1,h2,h3,h4,h5,h6{margin:0;font-weight:400}a{color:inherit;text-decoration:none}.container{max-width:1200px;margin:0 auto;padding:0 20px}.header{text-align:center;background-color:#f8f9fa;padding:20px 0}.footer{color:#fff;text-align:center;background-color:#343a40;padding:10px 0}.button{color:#fff;cursor:pointer;background-color:#007bff;border:none;border-radius:5px;padding:10px 20px;transition:background-color .3s;display:inline-block}.button:hover{background-color:#0056b3}