body, html {
  margin: 0;
  padding: 0;
  height: 100%;
}

.black-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: white;
  z-index: 9999;
}

.logo-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 1;
  display: block;
}

.logo-center.animate {
   animation: fadeOut 1s ease-in-out forwards;
}

@keyframes fadeOut {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    visibility: hidden;
  }
}