@media screen and (min-width: 600px){
.has-mega-menu{
position:static;
}
li.has-mega-menu .sub-menu {
width: 100%;
position: absolute;
top: NNpx; z-index: 100;
left:0px;
right:0px;
}
li.has-mega-menu:hover>.sub-menu{ display: flex;
flex-wrap: wrap; display: grid;
grid-template-columns: repeat(auto-fit,minmax(50%, 1fr));   
}
}
@media screen and (min-width: 992px){
li.has-mega-menu:hover>.sub-menu{grid-template-columns: repeat(auto-fit,minmax(33.3333%, 1fr)); }
}
@media screen and (min-width: 1200px){
li.has-mega-menu:hover>.sub-menu{grid-template-columns: repeat(auto-fit,minmax(25%, 1fr)); }
}
@media screen and (min-width: 600px){
li.mega-menu-column {
width: 100%;
max-width: 100%;
min-height: 1px;
padding: 10px 25px;
flex: 1 0 calc(50%);
}
}
@media screen and (min-width: 992px){
li.mega-menu-column {flex: 1 0 calc(33.333%);}
}
@media screen and (min-width: 1200px){
li.mega-menu-column {flex: 1 0 calc(25%);}
}