Did they recently update the design? I don't remember it looking this good. The dark mode is of the type I like (it's not too black! Unlike Github's) and the light mode is quite close to Github's design and thus familiar, but cleaner, less clutter, I think friendlier. And with nice touches like how the codeberg logo integrates into the header bar. There is a prominent rss feed button! Github doesn't event link one in the head (I think, the head is stuffed, at least my browser does not pick it up). The design not perfect (in dark mode the header should change to a darker color, like their docs page does, and the contrast between the two backgrounds colors is jarringly small, that needs a divider) but still, now I want to switch. It also loads so much faster. Having such a cool project hosted there helps as well.
Somebody has to figure out some sort of css media queries for OLED and similar screens, you can’t really optimize for both and I approve that going too dark doesn’t look good on standard monitors.