Find a solution to adapt our Sass to mixed declarations change

[HaSistrunk]

Is your feature request related to a problem? Please describe.

CSS is changing the way it handles declaration mixed with nested rules, and Sass is following their lead in version 1.77.7.

Describe the solution you'd like

This would impact the order of declarations and sometimes ability to nest includes in the way we currently do. Research the best practices/approaches for this and adapt our styles accordingly. There are most certainly work-arounds, so research if/when those are needed or preferred.