How to add Line Breaks and make Columns smaller in variations table

If attribute columns for example are too long and there is no line break, please add this custom CSS:

#variations-table-header-at {
	width: 100px !important;
	max-width: 100px !important;
}

table.dataTable.nowrap th, table.dataTable.nowrap td {
	white-space: normal;
}