html {
  scroll-behavior: smooth;
}
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
}
body {
  background-color: #000;
  image-rendering: -moz-crisp-edges;    /* Firefox */
  image-rendering: -webkit-crisp-edges; /* Webkit (Safari) */
  image-rendering: pixelated;           /* Chrome */
}
div#screen {
  width: 100%;
  height: 100%;
}
div#loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #000;
  background-color: #fff;
  font-size: 12px;
}
.fadeIn {
  opacity: 1;
  transition: opacity 250ms linear;
}
.fadeOut {
  opacity: 0;
  transition: opacity 400ms linear;
}