.crosshair {
    z-index: -1;
    width: 16px;
    height: 16px;
    background: var(--gui-icons);
    background-size: calc(256px * var(--crosshair-scale));
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    image-rendering: pixelated;
  }