.spritesheet{background:url(../images/spritesheet.png) no-repeat;background-size:31px 29px}.spritesheet.sprite_arrow_left_gray{width:20px;height:29px;background-position:0 0}.spritesheet.sprite_arrow_left_2{width:11px;height:16px;background-position:-20px 0}@media(min--moz-device-pixel-ratio:2),(-o-min-device-pixel-ratio:2/1),(-webkit-min-device-pixel-ratio:2),(min-device-pixel-ratio:2){.spritesheet{background:url(../images/spritesheet-retina.png) no-repeat;background-size:31px 29px}}