table.dataTable tr.dtrg-group th {
    background-color: #e0e0e0;
    text-align: left;
}

table.dataTable tr.dtrg-group.dtrg-level-0 th {
    font-weight: bold;
}

table.dataTable tr.dtrg-group.dtrg-level-1 th,
table.dataTable tr.dtrg-group.dtrg-level-2 th,
table.dataTable tr.dtrg-group.dtrg-level-3 th,
table.dataTable tr.dtrg-group.dtrg-level-4 th,
table.dataTable tr.dtrg-group.dtrg-level-5 th {
    background-color: #f0f0f0;
    padding-top: 0.25em;
    padding-bottom: 0.25em;
    padding-left: 2em;
    font-size: 0.9em;
}

table.dataTable tr.dtrg-group.dtrg-level-2 th {
    background-color: #f3f3f3;
    padding-left: 2.5em;
}

table.dataTable tr.dtrg-group.dtrg-level-3 th {
    background-color: #f3f3f3;
    padding-left: 3em;
}

table.dataTable tr.dtrg-group.dtrg-level-4 th {
    background-color: #f3f3f3;
    padding-left: 3.5em;
}

table.dataTable tr.dtrg-group.dtrg-level-5 th {
    background-color: #f3f3f3;
    padding-left: 4em;
}