Since implementing the dark mode I have been focusing more on the design of the site. Maybe it's just the darkness that brought all those little things into the daylight. Lighter themes might be more forgiving while darker overall is heavy enough on it's own that it requires more minimal design otherwise.
There is also a lot of balancing making everything work effortlessly between the light and the darkness. Less elements means less tinkering on how they look between these two. Keeping it simple I tried to reduce all the colours down to three (plus the highlight): dark, light and in-between. Dark and light are simply swapped when switching the theme while the other two remain the same. Simple and elegant!