:root {
  color-scheme: dark;
  background: #000;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #000;
}

#stage {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: #000;
}

#stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 900ms ease;
  will-change: opacity;
  user-select: none;
  -webkit-user-drag: none;
}

#stage img.is-visible {
  opacity: 1;
}