body::before {
  content: "ONLY FOR TESTING";

  position: fixed;
  top: 50%;
  left: 50%;

  transform: translate(-50%, -50%) rotate(-30deg);

  font-size: 100px;
  font-weight: bold;

  color: rgba(0, 0, 0, 0.15);

  z-index: 999999;
  pointer-events: none;
  user-select: none;

  white-space: nowrap;
}