How do you make the GUI look like the game

Issue Description

i am currently working on a mod loader and i think i am almost there but right now the UI looks like this:

which looks off-putting compared to the rest of the UI and i was wondering how to copy that style to this

Your code

I don’t think my code will be necessary but here is a link to my branch:

Extra error information

I don’t know what other info is needed

A lot of the GUI stuff I’ve worked on add the thrive style to the root control to apply styling:

For a lot of the other stuff like the microbe stage GUI, the styling is just individually applied to each element (which is not optimal of course, but that’s what there currently is).
I’ll open an issue to move more of the styling to the thrive theme: