Form Logo: Not resizing properly on mobile

Secondly, regardless of what size I end up with for my form, my logo works fine on the desktop view, but doesn't automatically resize (down) to fit the view on an iPhone. Is there an auto-sizing option of some sort, or how would I accomplish this?

Please try adding the next CSS to the form:

.form-all:before {
background-size: contain;
}

It should automatically re-size the logo.

Thank you.