  @-webkit-keyframes sb-glow {
    0%,
    100% {
      opacity: 1;
    }
    50% {
      opacity: 0.4;
    }
  }
  @keyframes sb-glow {
    0%,
    100% {
      opacity: 1;
    }
    50% {
      opacity: 0.4;
    }
  }

  /* We display the preparing loaders *over* the rendering story */
  .sb-preparing-story,
  .sb-preparing-docs {
    background-color: white;
    /* Maximum possible z-index. It would be better to use stacking contexts to ensure it's always
    on top, but this isn't possible as it would r