body{font-family:Arial,sans-serif;margin:0;padding:0;background-color:#f4f4f4}.container{width:80%;margin:auto;overflow:hidden}header{background:#35424a;color:#fff;padding:10px 0;text-align:center}h1{margin:0}button{background:#35424a;color:#fff;border:none;padding:10px 20px;cursor:pointer}button:hover{background:#45a049}form{background:#fff;padding:20px;border-radius:5px;box-shadow:0 0 10px #0000001a}input[type=text],input[type=password]{width:100%;padding:10px;margin:10px 0;border:1px solid #ccc;border-radius:5px}