.lightboxContainer {
  position: fixed;
  top: -100%;
  bottom: 100%;
  left: 0;
  right: 0;
  height: 100%;
  width: 100%;
  text-align: center;
}
.lightboxContainer:before {
  content: '';
  display: inline-block;
  height: 100%;
  vertical-align: middle;
  margin-right: -0.25em;
}
.lightboxContainer .screenMask {
  top: 100%;
  bottom: -100%;
  left: 0;
  right: 0;
  display: none;
}
.lightboxContainer:last-of-type .screenMask {
  display: block;
  position: absolute;
  height: 100%;
  width: 100%;
}
.lightboxContainer .lightbox {
  max-width: 80vw;
  max-height: 80vh;
  top: 100%;
  position: relative;
  display: inline-flex;
  vertical-align: middle;
  text-align: initial;
  margin: 0;
  padding: 0;
  flex-direction: column;
}
.lightboxContainer .lightbox > * {
  max-height: inherit;
}