.intro-overlay {
    background: $white;
    position: fixed;
    height: 100vh;
    height: calc(var(--vh, 1vh) * 100);
    width: 100%;
    z-index: 3;
    .ball {
      position: absolute;
      top: -50vh;
      left: 50%;
      transform: translate(-50%, -50%);
      border-radius: 50%;
      width: 100px;
      height: 100px;
      background: $black;
      margin: 0 auto;
      @media (max-width: 967px) {
        width: 50px;
        height: 50px;
      }
    }
  }