Responsive calculator app built with React

What are you most proud of, and what would you do differently next time?

I think I'm most proud of the theme toggle and getting the theme changes to work.

What challenges did you encounter, and how did you overcome them?

The trickiest part of this was actually getting the calculations to work correctly while getting things to display with the screen size constraints. Overall, I think it works ok but there are some edge cases where things get rounded up when I didn't think they should be thanks to the .toFixed() method.