div.sprite_logo {
	background: url(logo.jpg);
	width: 127px;
	height: 95px;
}

@media
	only screen and (min-device-pixel-ratio: 2),
	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) {
		div.sprite_logo {
			background: url(logo@2x.jpg);
			background-size: 127px 95px;
		}
}