H1 and H2 are too close in size

[cellio]

https://meta.codidact.com/posts/287303

A post with H1, H2, H3, and H4 headings looks like this:

The H1 and H2 are very close in font size; without the word "heading" changing the line length, I wouldn't notice a difference. There is a big gap between the H2 and H3 sizes.

Can we smooth that out, making H2 a little smaller so it fits halfway between H1 and H3, visually speaking? The editor preview has different sizing and this looks clearer:

I don't care what exact sizes we choose; I'm just looking for clearer distinctions.