@media screen
and (min-device-width: 1200px)
and (max-device-width: 1600px)
and (-webkit-min-device-pixel-ratio: 1) {
    .panel-col-top, .panel-col-middle, .panel-col-bottom {
        width: 100%;
        clear: both;
    }

    .panel-col-top,
    .panel-col-middle,
    .panel-col-bottom .inside {
        /*margin: 1em 0 1em 0;*/
    }

    .panel-separator {
        /*margin: 0 0 1em 0;*/
    }
}