/* Collapsible column groups — collapsed first-column placeholder cell. */
th.cg-placeholder,
td.cg-placeholder {
    max-width: 2rem !important;
    width: 2rem !important;
    padding: 0.25rem !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    text-overflow: ellipsis !important;
}