Can it be done with CSS? Grouping categories on category page

[Heliosurge (Dan DeMontmorency)]

These theme-component may do what you want. Or be a good base to look at code to get ideas.

Category Groups

Summary Category Groups allows you to assign categories to groups, which are then used to sort and collapse categories on the categories page. Repository Link https://github.com/discourse/discourse-category-groups-component New to Discourse Themes? Beginner’s guide to using Discourse Themes Install this theme component Features [category groups example] Important things to note: This only works with the site setti…

“Modern Category + Group boxes” as used in the Air Theme works well.

GitHub - discourse/discourse-minimal-category-boxes