Responsive newsletter sign-up form (both mobile and pc) (React+Vite)

Tried using react and react router, since I have been learning them. I thought, why not?

I didn't use css modules, since I thought I can change them anytime easily. Am i wrong? should I use them?

Are there any bad practices that I have used in this project? if so let me know.

Again I took a bit of time to center the cards and play with rem and em values. Are there any global typography or design standards? let me know or refer a link

THANK YOU