How to disable/overwrite mystnb.css when designing custom theme?

[kai-tub]

Hi all. :)

I am currently designing a custom sphinx theme that will end up being heavily used with MyST-NB.
The theme inherits from base and takes a very different styling approach, which results in quite a few "conflicts" when mystnb.css is loaded.
But I don't know what the best solution would be to solve these issues.
I would rather not create CSS rules that "overwrite" the mystnb.css configuration by appending !important, especially since I would still like users to provide custom CSS files that do not require !important.
The "issue" is that the theme CSS is loaded before possible extensions (which makes sense in most cases).
So one approach I was thinking about was to try to reduce the priority of mystnb.css to ensure that it is loaded before the theme.
But I am not sure how to accomplish this on a theme level, as a potential theme user wouldn't have to load MyST-NB.

I definitely plan on looking into this in more detail on my own, but maybe someone from the community has some experience with Sphinx theming and knows exactly what I am looking for :)
It definitely feels backward trying to "overwrite" the behavior of the extension.

PS: Loving the work on MyST-NB. ❤️