I am wanting to make a VERY minimal email form. I am wanting to use Web Form Builder so that I can use the capability of saving input to a spreadsheet.

I have attached an image of how I want the form to look when embedded into the web site -- or, at least as close to it as possible.

I have been able to get the form down to a small size, with transparent background and minimal borders and padding; however, I can't seem to figure out what to do with the Submit button. If I can't achieve the look I am wanting, is it possible to not have the submit button at all, and just let people enter their email address and press Enter? Or, have the Submit button inline with the email field?

I have also attached an image of what I have accomplished in the Web Builder so far.

Thank you.