body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.pan-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.image-wrapper {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}
@media screen and (min-aspect-ratio: 1920/1281) {
  .image-wrapper {
    width: 110vw;
    height: calc(110vw * 1281 / 1920);
  }
}
@media screen and (max-aspect-ratio: 1920/1281) {
  .image-wrapper {
    height: 110vh;
    width: calc(110vh * 1920 / 1281);
  }
}
.image-wrapper img {
  display: block;
  width: 100%;
  height: 100%;
}