Mobile using flex and desktop using grid

Hey, guys! How are you?

I'm looking for best practices and improvements I could've be done in my project.

In the Desktop layout I`ve changed the font-size to 12px and the cards get a bit smaller because I tried to fit them in a 1024px layout, and without the sketches it gets a little difficult.

Besides that, could you help me pointing what is right/wrong and what would you do in a different way?

Thanks to you all!