.archive-preview {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 35%;
  height: 40%;
  border-radius: 0.5em;
  overflow: hidden;
  z-index: 100;
}

@media (max-width: 900px) {
  .archive-preview {
    width: 75%;
    height: 35%;
    opacity: 0.75;
    z-index: -1;
  }
}