@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {
    /* Retina-specific stuff here */
    #header {
        background: url(../images/siteTitle-2x.png);
        background-size: 165px 50px;
    }

    #footer {
        background: url(../images/footer-2x.png);
        background-size: 398px 98px;
    }

    .sprite {
        background-image: url(../images/buttons-2x.png);
    }

    #startMachine {
        background: url(../images/start_machine_new-2x.png);
    }

    #fullMachineFrame {
        background: url(../images/machineBG-2x.png);
    }

    #preloader {
        background: url(../images/preloader_bg-2x.png);
    }
}