.lightbox {
  display: none;
  position: fixed;
  z-index: 999;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1em;
  background: rgba(0, 0, 0, 0.8);
  -webkit-backdrop-filter: var(--pico-modal-overlay-backdrop-filter);
}

.lightbox:target {
  display: block;
}

.lightbox span {
  display: block;
  width: 100%;
  height: 100%;

  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}