order summary component first steps with grid

Hello.
In this project I started to use grid and tried to understand it better. For now it's harder than flexbox - definitely :D but it's just the beginning.

The project was quite pleasant, yet newbie-demanding. I Feel like there is too much code in CSS, it can probably be reduced somehow.

Anyway, I enjoyed coding this project. Any feedback about what can I improve, especially with the grid appreciated! ;)

Thank You!