@media
only screen and (-webkit-min-device-pixel-ratio: 2.625),
only screen and ( min--moz-device-pixel-ratio: 2.625),
only screen and ( -o-min-device-pixel-ratio: 2.625/1),
only screen and ( min-device-pixel-ratio: 2.625),
only screen and ( min-resolution: 393dpi),
only screen and ( min-resolution: 2.625dppx) {
/* Retina styles here */
}