html, body {
  font-size: 62.5%;
  height: 100%;
  overflow: hidden;
  background: url("empty_paper_bg.png") 50% 50% no-repeat fixed;
    background-size: cover;

}

.magic {
  visibility: hidden;
  z-index: 5;
  position: absolute;
    top: calc(26% - 8rem);
  left: calc(48% - 8rem);
    margin: auto;
  width: 16rem;
  height: 16rem;
  background: url("empty_paper_magic.png") 50% 50% no-repeat fixed;
  background-size: cover;
  border-radius: 50%;
}