.custom-categories {
    padding: 10px;
}

.custom-categories details {
    margin-bottom: 8px;
}

.custom-categories summary {
    cursor: pointer;
    font-weight: 600;
    padding: 6px;
}

.custom-categories ul {
    list-style: none;
    padding-left: 15px;
}

.custom-categories li {
    margin: 4px 0;
}

.custom-categories a {
    text-decoration: none;
}