body {
    /*background-color: #f8f9fa;*/
    /*padding-top: 20px;*/
    padding-bottom: 40px;
}
.card {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    margin-bottom: 20px;
}
.header {
    background: linear-gradient(135deg, #6f42c1 0%, #6610f2 100%);
    color: white;
    padding: 2rem 0;
    border-radius: 0 0 20px 20px;
    margin-bottom: 30px;
}
.preview-area {
    min-height: 300px;
    max-height: 500px;
    overflow-y: auto;
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 5px;
    padding: 15px;
    font-family: monospace;
    white-space: pre-wrap;
}
.btn-purple {
    background-color: #6f42c1;
    color: white;
}
.btn-purple:hover {
    background-color: #5a32a3;
    color: white;
}
.footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    color: #6c757d;
    font-size: 0.9rem;
}