with open('src/main/resources/static/css/custom.css', 'a') as f:
    f.write('''

/* CSS cho Tab Đa năng */
.custom-tab-btn {
    padding: 10px 20px;
    border: 1px solid #ccc;
    background-color: #f8f9fa;
    color: black;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}

.custom-tab-btn:hover {
    background-color: #e9ecef;
}

.custom-tab-btn.active {
    background-color: #0055a5;
    color: white;
    border-color: #0055a5;
}
''')