.single-mc-events #sidebar{display:none}.single-mc-events #left-area{width:100%!important;float:none!important}.single-mc-events #content-area{width:100%!important}.et_mobile_nav_menu .mobile_nav .mobile_menu_bar:before{color:#000000!important}Das reicht – einfach in Divi → Theme Customizer → Additional CSS einfügen und speichern. Fertig.