Wikipedia Viewer on React

I Built This
1

Hi there!
I have decided to try React Hooks and created the Wikipedia Viewer on it. I need some feedback.
https://codepen.io/OStefani/pen/YBgqwQ

2

Looks nice! At the minimum width of my browser, the outline around the textbox starts looking odd though.

31%20AM
31%20AM664×1206 67.9 KB

3

Thanks for your feedback, I will fix it.