Customizing Indicium pages using custom CSS

Related products: Indicium Service Tier

I like the new feature to customize CSS in Universal ith a custom.css. 
Is it possible to create this feature for in Indicium style.css too?

Updated idea status NewOpen
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Would be nice to have.

Tried changing some stuff, but some classes like .Title is the same for the initial login page and the follow up screen for example. Which makes separate styles for each page harder, if not impossible, to change. 

And the fact that with an Indicium upgrade all the changes get overwritten of course..