Base Apparel coming soon page CSS, JS, Flex! Form submit modal feature

Any feedback is helpful and welcome.

I couldn't get working was because I had my modal set to -20px on the top and after the user submits the form, the top ends up being set back to 0. This way I could have the modal slide down slightly.

I ended up removing the code but I had it when the modal section had the class added from JS that says "modal-open" is when I was resetting the top. Why could I see the animation in the console but it was not triggering at all once the modal appeared?