Results summary component - responsive layout with grid and flex

I have a little problem with my button responsiveness. With padding I set it's size for mobile and desktop separately and issues emerges in the middle. The button is too small when the screen is between the smallest size for this challenge - 375px and the breaking point - 450px. I fixed this setting padding in % instead of px. Is there any other good option to make button responsive?

I also wonder why projects on my screenshot is visibly smaller than that from original. I tried to make it relatively big to much the original. Does someone knew why it is like this? Is it only a matter of size of components on my project or something else?