How to hide radio button on desktop, but not on mobile

I am trying to hide a radio button on desktop version of our form, but show it on mobile versions. Here is the CSS I have created.

This is what I found in all the forums that I looked at.  But it does not seem to be working for us.  Any suggestions on what I am doing wrong?  The #input_120_0 and #input_120_1 are the IDs of the radio button.

Please inject the following CSS code: http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes 

#label_input_120_1 {

    display: none;

}

@media only screen and (max-width: 480px) {

#label_input_120_1{

    display: block !important;

}

}

Result: https://form.jotform.com/61805695316966 

Desktop view:

Mobile view:

Let us know if you need more help.