Bulma has to be my all time favorite CSS framework. I have used it in production at a large company I worked for and it stood up great! My next job I wrote most of the CSS myself. That held up fine too, but not as well, and it was a HUGE pain to write.
I have always hated using big heavy style frameworks like Bootstrap or Foundation, mostly because of their dependency on jQuery. And sure there are packages for react & bootstrap, but idk. It just feels klunky and gross. Bulma feels fun sleek and sexy.
I feel like Bulma does just the right amount. It makes no assumptions on your JS, has no dependency to jQuery, it doesn't come with a million different components. It doesn't have a million variants of everything. Just a couple simple great building blocs that I love using. I plan on using Bulma when building Realm of React and probably in the course work itself.