.simple-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
  z-index: 9999;
}

.simple-lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}

.simple-lightbox img {
  max-width: 90vw;
  max-height: 90vh;
}