Horizontal and vertically centered QR code using margins

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

Getting my first project done. I hope to continue using frontend mentor to improve my front end development skills.

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

Trying to figure out how to vertically center the container. After some research I found a way using margins and "top"/"left".

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

I couldn't figure out how to get the google font to work for some reason. If anyone can see the issue that'd be awesome.