body:before {
  content: "Preliminary";
  position: fixed;
  height: 0;
  width: 0;
  top: 50vh;
  left: 50vw;
  display: flex;
  justify-content: center;
  align-items: center;
  transform: rotateZ(315deg);
  font-weight: bold;
  font-size: 8em;
  opacity: 0.2;
  color: red;
  z-index: 0;
}