.header li.menu-item .mtv_megamenu{display:block;position:absolute;z-index:0;opacity:0;visibility:hidden;max-width:100%;width:0;height:0;left:0;right:0;transition:opacity .3s ease,visibility .3s ease}.header li.menu-item.menu-hover .mtv_megamenu{z-index:1000;opacity:1;visibility:visible;height:auto;width:100%}