Basic Responsive Solution Using Absolute Positioning

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

I was happy with my general reproduction and I tried my best to make it responsive. However, it was my first time and I'm disappointed in how the component scales as the screen's width changes.

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

It took me some time to figure out the box shadow but I did eventually.

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

I'd like to know what better approaches there are to making the component's size responsive. I'm pretty sure media queries are the right idea but maybe not. Other than that, any feedback is appreciated.