header.main-header.fixed-top {
  -webkit-transition:all 0.4s;
  transition:all 0.4s;
}

@media (max-width: 767px){
  body.nav-fx-scrolled.nav-fx-scroll-up header.main-header.fixed-top {
    -webkit-transform: translateY(-100%);
    -moz-transform: translateY(-100%);
    -ms-transform: translateY(-100%);
    transform: translateY(-100%);
  }
}