Change color in subscription form frames


I have a child theme with a subscription to newsletter at the bottom. Please have a look at studyforartplatform. I have managed to change the colour on ”your mail” and all the text by adding css code but there are still some things I want to do but am unable to do. It would be super if you could help out.

  • Make ”Your name” also with black frame.
  • Make the two frames without the little shadow in mobile view.
  • Create underscore on only the button text.

Thanks for all the help in this community!