How to remove the image and make the form float to left only in mobile device?

I have previously raised a question about how I replace the photograph on the Registration Theme with my own and be able to embed this in my Dreamweaver Site.  Also, how do I make this responsive?  (Half of the responsive screen is the photograph and the other is the Registration Form).  I would prefer to have the photograph floated so that the registration screen fills a mobile screen.  Screen shot attached

Your help would be appreciated

Hello stephen.brookes,

Please inject the following custom css code in your form and that should solve your problem:

@media screen and (max-device-width: 768px) {

 .supernova {

    background-image: none !important;

}

.jotform-form {

    float: left !important;

    width: 100% !important;

}

}

The above custom css code will hide image and float the form to left only in mobile screens.

The following guide should help you how to inject custom css code in your form:  http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes 

Hope this helps.

Do get back to us if you have any questions.

Thank you!