Crowdfunding product page - HTML / CSS / JS

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

I quite like the animated numbers and progress bar.

I would use grid to create the pledge amount cards straight from the offset. Initially I implemented with flex boxes, however due to the necessary responsive requirements, I found it easier to implement with grid as it was more straight forward to re-arrange the elements on the card for mobile view.

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

The overlapping of the main content div on the header took a bit of time researching grid settings to get the desired result.

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

Any feedback would be welcome, in particular for the JavaScript code.