html,
body {
  margin: 0;
}
.shellX {
  background-color: #000;
  height: 100%;
}
.shell {
  background-color: #000;
  height: 100%;
  background-position: center;
  background-image: url("logo100s.svg");
  background-repeat: no-repeat;
  animation: loadingSlow 2s infinite;
}
#refresh-btn {
  position: absolute;
  top: 70%;
  left: 50%;
  transform-origin: center;
  transform: translateX(-50%) scale(3);
  color: white;
}
.hidden {
  visibility: hidden;
}

::-webkit-scrollbar {
  display: none;
}
@keyframes loadingSlow {
  0% {
    transform: rotate(0deg);
  }
  10% {
    transform: rotate(5deg);
  }
  20% {
    transform: rotate(-5deg);
  }
  30% {
    transform: rotate(5deg);
  }
  40% {
    transform: rotate(-5deg);
  }
  50% {
    transform: rotate(5deg);
  }
  60% {
    transform: rotate(-5deg);
  }
  100% {
    transform: rotate(5deg);
  }
}