.containerb {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
h1 {
    text-align: center;
    margin-bottom: 20px;
}
.form-group {
    margin-bottom: 15px;
}
label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
}
input[type="text"],
input[type="number"],
select,
input[type="color"],
textarea,
input[type="checkbox"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
}
select {
    appearance: none;
}
.button-preview {
    padding: 10px 20px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}
.button-preview:hover {
    background-color: #0056b3;
}
#code-display {
    margin-top: 20px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f5f5f5;
    font-size: 16px;
}