.menu--container.collapsing.in .menu--grid{
  -webkit-transition-timing-function: ease !important;
       -o-transition-timing-function: ease !important;
          transition-timing-function: ease !important;
  -webkit-transition-duration: 500ms !important;
       -o-transition-duration: 500ms !important;
          transition-duration: 500ms !important;
  -webkit-transition-property: margin-top;
       -o-transition-property: margin-top;
          transition-property: margin-top;
}

.collapsing.in-remove .menu--grid{
  -webkit-transition-duration: 304ms !important;
       -o-transition-duration: 304ms !important;
          transition-duration: 304ms !important;
  -webkit-transition-property: margin-top;
       -o-transition-property: margin-top;
          transition-property: margin-top;
}