.landing-dxs {
  z-index: -1;
  transition: all .5s ease-in-out;
  opacity: 0;
  background: rgba(0, 0, 0, 0.8);
  position: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}

.landing-dxs.show {
  opacity: 1;
  z-index: 921;
}