/* Custom styles */
body {
    background-color: #f8f9fa;
}

.navbar-brand img {
    filter: brightness(0) invert(1);
}

#categoryTree ul {
    list-style: none;
    padding-left: 1rem;
}

#categoryTree .list-group-item {
    border-left: none;
    border-right: none;
    padding: 0.75rem 1.25rem;
}

#categoryTree .list-group-item:first-child {
    border-top: none;
}

#categoryTree a {
    color: #495057;
    transition: all 0.2s;
}

#categoryTree a:hover {
    color: #0d6efd;
}

.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.table th {
    background-color: #f8f9fa;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .table-responsive {
        overflow-x: auto;
    }
}