.transition-1 {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: black;
  opacity: 0;
  pointer-events: none;
  z-index: 9999;
  transition: opacity 0.5s ease-out;
}

.transition-1.is-active {
  opacity: 1;
  pointer-events: all;
}