Is it possible to add an attribute to a mixin to target a specific psuedo state (ie 'behaviour')?

We have column headings in a table that are inheriting a :hover background color and a :focus style, neither of which we are able to override.

In our Component Styles > Layouts > Trees and tables > Default > Columns > Column headings, there is no option to specify a hover for the background color. Can we add a formatting rule for :hover there?

We are able to change the Column headings focus background color but not for the hover stage.

Regarding the outline on the column heading:

The column headings (class: "gridHeaderLabel" ) are inheriting a :focus outline that we cannot override in any of the additional styles we have added to our Component Styles or their inherited mixins.

The css targeting that is:

table[uniqueid]:not([uniqueid=""]) tr.cellCont th:not(.hiddenCell) > div.gridHeaderLabel:focus { outline: 2px solid #0076D1;}

but we can neither change the color, outline weight, or appearance via any of the component styles or mixins, despite trying to override it in every place that would seemingly be applicable from within the Component Style settings

Alternatively are there ways to create a component style, and corresponding "behaviour" states for Table cells?

Any suggestions would be appreciated!

thank you