/** http://www.brettjankord.com/2012/11/28/cross-browser-retinahigh-resolution-media-queries/ **/
/** 1.25 dpr **/
@media (-webkit-min-device-pixel-ratio: 1.25), (min-resolution: 120dpi){ 
    /** Retina-specific stuff here **/
}

/** 1.3 dpr **/
@media (-webkit-min-device-pixel-ratio: 1.3), (min-resolution: 124.8dpi){ 
    /** Retina-specific stuff here **/
}

/** 1.5 dpr **/
@media (-webkit-min-device-pixel-ratio: 1.5), (min-resolution: 144dpi){ 
    /** Retina-specific stuff here **/
}

/*2.0 dpr **/
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi){ 
    /** Retina-specific stuff here **/
}