QR Code using flexbox

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

I think I was able to create the correct markups and divs in order to create a flexible and responsive solution.

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

At first, I was slightly confused about why the flexbox wasn't responding to my "align-items" property. However, I was able to fix the situation by setting the body's minimum height to 100vh.

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

I want to get professional opinions on what I can do to improve on.