body {
    font-family: Arial, sans-serif;
    margin: 20px;
}

.header,
.preview,
.footer {
    margin-bottom: 30px;
}

.input-group {
    margin-bottom: 15px;
}

label {
    display: block;
    font-weight: bold;
}

input,
select,
textarea {
    width: 100%;
    max-width: 600px;
    padding: 8px;
    margin-top: 5px;
}

textarea {
    resize: vertical;
}

.preview {
    min-height: 300px;
}

.preview-content {
    border: 1px solid #ccc;
    padding: 20px;
    min-height: 200px;
    max-width: 800px;
    overflow-y: auto;
    background: #f5f5f5;
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
}

button {
    padding: 10px 20px;
    margin-right: 10px;
    background: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button[name="save"] {
    background: #28A745;
}

.error {
    color: red;
}