body {
    font-family: Arial;
    background-color: #f4f4f4;
}

fieldset {
    width: 500px;
    margin: auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
}

h1 {
    text-align: center;
    color: darkblue;
}

input, select {
    margin: 5px;
    padding: 5px;
}

input[type="submit"] {
    background-color: green;
    color: white;
    padding: 8px 12px;
    border: none;
}

input[type="submit"]:hover {
    background-color: darkgreen;
}