/* Large desktop */
    @media (min-width: 1200px) { ... }
     
    /* Portrait tablet to landscape and desktop */
    @media (min-width: 768px) and (max-width: 979px) { 
	.caustom{
            background:#FF0000;
            margin-top:80px;
            }
}
     
    /* Landscape phone to portrait tablet */
    @media (max-width: 767px) { 
	.caustom{
            background:#3399CC;
            margin-top:80px;
            }
	}
     
    /* Landscape phones and down */
    @media (max-width: 480px) { 
	.caustom{
            background:#6699CC;
            margin-top:80px;
            }
	 }