Reply To: Cart appearing behind menu in Basel Coffee

Yes, it is because of the transparent header. Try to use this code snippet to move the cart widget out of the screen

body .global-header-vertical .cart-widget-side {
    transform: translate3d(-680px,0,0);
    -webkit-transform: translate3d(-680px,0,0);
    -ms-transform: translate3d(-680px,0,0);
    -webkit-transform: translate3d(-680px,0,0);
}