design of a qr code component cards

What are you most proud of, and what would you do differently next time?

I was able to make the design as close to the ones given and i hope to keep improving.

What challenges did you encounter, and how did you overcome them?

one of the challenges is about the container, how i can make them very responsive to different screen sizes. Nevertheless, i try my best to make it look as close as possible.

What specific areas of your project would you like help with?

i would love to be helped on the use of css properties like media query. flexbox and grid and some function like calc(), to make responsive design and creating a known size of a container and how to center the container on the body element irrespective of various screen sizes and dimension.