photo-view/styles/main.css

PhotoView - Pan, PinchZoom and Swipe for mobile

.photo-view, .photo-view-1 {
  width: 100%;
  height: 400px;
  background-color: #607D8B;
  border: 1px solid #000;
  box-sizing: border-box;
  position: relative;
  margin-top: 50px;
  overflow: hidden;
}
.photo-view img, .photo-view-1 img {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  margin: auto;
  max-width: 100%;
  max-height: 100%;
}