QR code component with flexbox

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

I couldn't figure out if there is a way to get box-shadow parameters from Figma, so I just tried to create a shadow that looked similar.

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

Should I use em/rem units for everything, or is it okay to leave border-radius and, say, box-shadow in pixels? Right now it's all in pixels.

I also opted to just use attribute selectors as the assignment is so small, so I don't really see the need for classes.