body,
html {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.fullscreen-image {
  position: relative;
  width: 100%;
  height: 100%;
}

.fullscreen-image img {
  width: 100%;
  height: 100%;
  
}