How to remove background image from Thank You page?

My form has a background image

https://www.jotform.com/build/73124118984257

When I test it and click on submit it goes to the thank you page but then a large image of the form background appears across it.  I checked the form designer and it doesn't show any background image that I can see and I didn't see anything for this in the CSS.  Can someone tell me why this is happening and how to remove it.  Thanks

Try adding this code into your CSS 

.thankyou {

  background: none !important;

}

https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes

Let us know if the issue is still present.

Sorry please use the code below instead.

div#stage.form-all {

   background: none !important;

}

Thanks,

I added the CSS code and it worked.  Thanks for the quick response!