Bulma is another popular CSS framework and its main feature is the fact that its components rely heavily on flexbox, which makes it truly modern. You may think that Bulma is somewhat similar to a hybrid of Bootstrap and Semantic UI, but without any complexity. It uses some of the same principles as Semantic User Interface, with class names, includes many popular components, but manages to keep things simple - for example, form elements are barely styled to maintain a cross-browser look.
