Checkbox styling

I would like to be able to style the checkbox in the headercell independently of the checkboxes in the data row cells, from the source it looks like regardless of whether the checkbox is in the header cell or not it seems to get the same style.

Is there any wya to do this?

No source file or test is named. Start by tracing how checkboxes are rendered and styled in the header cell versus data row cells, then determine the existing styling entry point. Done means the header checkbox can receive styling independently from row checkboxes, with the relevant behavior covered by the project's existing validation or tests.

Written by the indexing model from the issue text.