#lightbox {
  position: fixed;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 999;
}

#lightbox img {
  max-height: calc(100vh - 10vw);
  max-width: calc(100vw - 10vw);
  margin-top: 50vh;
  margin-left: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.1s ease-in-out;
}