[zuprau]

> somebody who has never worked as a professional UI/UX designer

Such as the Nielsen Norman Group.

> "Do not use modal dialogs for nonessential information that is not related to the current user flow."

> From https://www.nngroup.com/articles/modal-nonmodal-dialog/

Nonessential information such as, let's say, "details."

I'd say that this minisite is exactly on point.