QR code component challenge - built with html and css

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

I am proud of the fact that I am making progress with mastering CSS tricks for setting height in vh units and using background images

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

I spent a lot of time on the CSS because I had become a little rusty. To overcome this, I was quickly referring to the CSS documentation on w3 schools website

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

The CSS tricks are still a little too many for a slow learner like me. I would like help from an experience pal on how to quickly go through the various CSS tips and master them at the tip of my fingers.