I think there might be an issue with the reaction button styling on dark mode. I found it confusing trying to understand if I've already reacted to a post or not
Here's what it looks like when I haven't reacted:
And here's what it looks like when I have reacted:
Compare that to Github, again first when I haven't reacted:
And when I have reacted:
Personally I find Github's styling much more obvious.
The mouse hover states in Hall are also a bit weird too.
