#landscape-container
{
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 1;
  color: white;
  z-index: 9999;
  padding: 50px;
  font-size: 200%;
  text-align: center;
  position: absolute;
  align-items: center;
  background-color: black;
  justify-content: center;
}

#landscape-text {
  animation: blinker 1s linear infinite;
}

@keyframes blinker {
  50% {
    opacity: 0.50;
  }
}
@media screen and (orientation:portrait) {
  #landscape-container {
    display: flex;
  }
}
@media screen and (orientation:landscape) {
  #landscape-container {
    display: none;
  }
}