Mobile-first QR code design

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

I'm proud of making a website work properly in mobile as I'd struggle in it normally.

I'd like to make it size properly in desktop as well.

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

I had to deal with centering the card div. I looked up websites and blogs and checked out how they centered their divs. I then used inspect element to help me further.

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

I need some help on sizing the card properly on desktops.