My Password Generator using JS, Flex, CSS, custom checkboxes

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

I am excited about the custom checkboxes I built that kept the green theme, and the animated labels that appear after copying or hitting the button with no boxes checked. I am not confident in my JS solution with the long characters arrays that I push into one long array. Also, I am sure there's a way to reduce the conditionals for the box colors but I can't see how to re-factor those.

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

JS script has long blocks that I couldn't figure out how to re-factor. Long arrays and conditionals. It works and I'm looking for feedback.

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

Re-factoring my JS to more concise, targeted syntax.