Newsletter Sign Up Form

Hello fam!

There are some details that I would like to fix:

1. The most obvious one is the broken email subscription link. I get that I need to reference the input (html) element on the js document, but I 'm totally lost on what to do next, like for example: how do I display the "card-subscription" part (css class) that contains the mobile success message meanwhile the other part (page) stays hidden?

I guess I started with the FrontEnd Mentor challenges because I really not want to spirral only on tutorials-passive behavior instead of grasping the concepts by coding.

I do apologize, because I get that I shouldn't seek for easy answers and solutions (specially when I really can't grasp the user activity part of the code), but I really do want to fix those details, so of course, any advices and suggestions are welcome.