Tip Calculator with JavaScript (Responsive)

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

My first JavaScript project! I am extremely proud of completing this project. There were many challenges in this one, such as naming classes and variables, getting the tip buttons and custom tip to work the way I wanted them to.. In the end, this simple statement made my entire logic work:

let selectedTip = 0;

While there's room for improvement in my code, the sheer satisfaction of seeing it work brings me so much joy and relief. This was a fun one. Feedback is also welcomed! 😁