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

.fullscreen-image {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: contain;
  object-position: center;
}

@media (orientation: portrait) {
  .fullscreen-image {
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: contain;
    transform: none;
  }
}