Age calculator using html, css, and javascript

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

I am most proud of how quickly and pain-free I was able to do the javascript part of the app.

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

The biggest challenge I encountered was the styling of the app. It was tough trying to position the elements to try and look exactly like the picture in the design. I think I got pretty close. It took me a long time to try and position the elements the right way.

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

I would love feedback on everything in general. More specifically though, on the front-end part as that is what I tend to struggle with on most of my challenges.