body {
    background-color: #f8f9fa;
    font-family: 'Arial', sans-serif;
}

.container-fluid {
    padding: 0 20px;
}

h1 {
    color: #333;
    font-weight: bold;
}

.card {
    margin-bottom: 20px;
}

.input-group {
    margin-bottom: 10px;
}

.btn {
    margin-right: 5px;
}

#jsonPreview {
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f8f9fa;
    padding: 15px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    white-space: pre-wrap;
    word-wrap: break-word;
}