I always think its strange frameworks like this make you override SASS variables to customize, and talk about SASS modularity. If you are working with SASS, you likely have the skill set to make something like this yourself, or are already working with a Designer. In fact, I think its a good exercise for any Front End Dev to go through the exercise of creating something like this. Pick a good font set, a color pallet (there are sites for that), and standard padding size (16px, 12px, 8px, 4px works well), and you have all you need.
The article had 0 code examples, and only a vague overview of a novel Tile layout. (Is that just display: grid?) Both links from the article to "Bulma" were download pages. I had to go several steps to get to an example. Nothing sets this apart from the million other CSS frameworks.