This is a reactjs project, Te amperzand syntax is working fine in Javascript file but not in css.
How to write hover class in css file?
>Solution :
If you want to write in same class. You should use Sass/Scss.
Save the css file with .scss extension. It is a precprocessor for better syntax.
Refer this sandbox:
https://stackblitz.com/edit/react-uwktzj?file=src%2FApp.js