QR Component using basic CSS

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

I tried not to use extra divs where I didn't need them.

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

I may be using my sub selector incorrectly (container p instead of container > p)

I also don't like the use of VH for the main, but couldn't think of a better way to do that.

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

Was I using the sub selectors correctly? (container p vs container > p)

Is there a better way to center the card. (The age old question)