ElectricFeet on "[Theme: Customizr] Logo, Slider arrow, featured pages and tagline not responsive."

@media (min-width: 1200px) {
    /*Stop the slider growing crazily*/
    #customizr-slider {
        max-width: 1170px;
        margin-left:auto;
        margin-right:auto;
        }
    }

should do it.