Tangentially, for me the stacks project is the gold standard of mathematical typography on the web. Look at this beauty: https://stacks.math.columbia.edu/tag/074J
Also check the diagrams: https://stacks.math.columbia.edu/tag/001U
If anyone can explain to me, a complete noob regarding html, how they achieve this result with html, css and whichever latex engine they use, I would be grateful. I want to make a personal webpage in this style.