Fix CSS Bug in My Electron JS/React App

I'm seeking assistance to fix a bug in my Electron JS and React code. Specifically, I'm having issues with my CSS. I believe I have some responsive design problems that I can't figure out. The issues are primarily with buttons and containers. I'm looking for a freelancer with strong skills in CSS, Electron JS and React, who can help me identify and fix these bugs in a timely manner.

Ideal Skills and Experience:
- Proficiency in CSS, Electron JS and React
- Experience with debugging and troubleshooting code
- Skills in responsive design
- Ability to work with UI/UX issues
- Experience with fixing CSS issues in Electron JS/React applications.