I'm installing a subtheme of MiniCSS theme. In my info file I added a CSS file to contain overrides for the base theme CSS. When I test this, the base theme CSS files are imported AFTER the subtheme CSS files, so creating simple CSS styles like "footer { font-color: red; } get overwritten by the base theme styles.
I do not remember this ever being an issue with D7, am I doing something wrong here, or is there some trick to making this work?
I'd recommend to (also) ask – or to report the issue – in the queue of the Mini CSS theme: https://github.com/backdrop-contrib/minicss/issues
edit: The maintainer of the theme just contacted me via Gitter and posted a link to the issue Dealing with sub-theme stylesheet on Github where he describes how to get the sub-theme CSS after the one of the parent-theme.