.image-viewer {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 80vh;
  background: #111;
  cursor: grab;
}

.image-viewer:active {
  cursor: grabbing;
}

.image-viewer img {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  transform-origin: center center;
  max-width: none;
  max-height: none;
  user-select: none;
  pointer-events: none;
  will-change: transform;
}