I have a few problems with creating my custom pallet. So far these are the problems that I have been having. If anyone knows how to fix them, please pm me or comment below

For this first problem, I don't know how to change the font for the submit button from arial to book-antiqua.

For the next three problems, I'm at a loss of how to change neither the font nor the color of the text.

For my next problem, I couldn't figure out how to change the hover color on the den page. I was able to edit the hover color of everything else except for this.

Finally, my last problem is exploring. Since I haven't figured out how to edit the explore page yet, it is still stuck in its default state which just clashes with the rest of my pallet.