Basically, the backend was separated into two columns. Stacking them on mobile would be tedious to use, because you'd have to scroll a lot. Now, it just slides left and right with css transitions to let you see what you need.
That probably doesn't make much sense, but I can't really show what's going on here because the backend is not publicly visible, but I've added the creation of a demo version of the backend to my todo list. Not sure when I'll get to that, but for now, I can use the backend on my phone. So that's cool.