Hi, I have just put a border around my page using the custom CSS in the visual composer;

body {
border: 15px solid white;
 display:block;
}

Everything works fine and how I want on desktop view, but how would I go about hiding it from the mobile view?

All I want is to just hide that custom css code above ^^ when viewed on a mobile?

Is this possible? Many thanks 

UPDATE
I just realised my problem may lie in the fact that my row is set to 'stretch row and content' (which is fine for desktop)
but for the images to be full-width on the mobile (removing the border), the row needs to be set as 'stretch row and content [no paddings]'

Is there a way I can set it so the row is one way on the desktop and another on mobile?