RPS Challenge using Tailwind + Typescript + Nextjs

Quick questions:

In this project, I didn't build any mobile-specific elements, everything uses the same CSS code. Is this acceptable, or should I be building more mobile-only elements and avoid making it work exclusively through just CSS?

I had to reduce the size of the circles that appear around the winning option because the correct size would break the page, and for some reason I simply couldn't get any of Tailwind's overflow options to work properly, it would either do nothing, or if I used overflow-hidden it would crop in a strange way. What am I doing wrong here?

Any feedback is welcome!