Retina Display : @media Query

* Retina Display */

@media only screen and (-webkit-min-device-pixel-ratio: 2),

only screen and (-moz-min-device-pixel-ratio: 2),

only screen and (-o-min-device-pixel-ratio: 2/1),

only screen and (min-device-pixel-ratio: 2),

only screen and (min-resolution: 2dppx) {

.menu-nav {

background-image: url(../img/menu-mobile__402x.png);

background-size: 16px 32px;

}

}