QR-code component with HTML and CSS

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

The most thing I proud of is I'm completely finished this QR-code component without any framework or supported from Ai. I just searched up in W3schools about the box-shadow. I've used tailwind-css before I know the structured and what is the first thing to began with.

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

Talking about challenges I encountered is I'm lost initially cause I've never used css for a long time. However, I tried to think which property I should use.

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

I think I can do this one. But not pretty sure about the next project.