#loader {
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0, 0.4); /* Black w/opacity/see-through */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999999;
    width: 100%;
    height: 100%;
    text-align: center;
  }