#w3cs-wrapper {
    padding: 15px;
    border: 1px solid #ddd;
    max-width: 400px;
    margin: 20px auto;
    background: #f9f9f9;
}
#w3cs-result {
    margin-top: 15px;
    background: #fff;
    padding: 10px;
    border: 1px solid #ccc;
}