Ask HN: Link to interactively learn UI/Typography design

There was a link awhile ago which showed the core fundamentals of UI layout/typography.

It laid it out extremely simply by progressively adding the concepts to an unstyled block of text.

I've tried searching in google and its 100% AI blogspam (repulsive)

I also tried searching HN

I would also love to see other similar links as well. I'm trying to help my brother learn design for simple logos, but it occured to me I just take all the concepts for granted of focus arc, hierarchy, contrast, balance, ratios, aesthetics... i dont remember learning them I just sort of picked it up as i went

I know there are a ton of good "design for developers" links i literally just cant find any of them