Responsive QR code landing page using CSS and Flexbox

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

Most proud of working out how to center a div using Flexbox. Next time I would focus more on getting the general layout sorted before messing with padding/margins.

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

It was hard to get my live url running on Github pages and I couldn't work it out at first but I found a YouTube video that explained it nicely and started over my repository to get it set up right.

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

I'm mainly unsure if my code is the most efficient way of solving the problem or if I spent too much time trial and erroring with padding and height, etc.