.content-loader {
    width: 100vw;
    height: 100vh;
    position: absolute;
    display: flex;
    background: #ddd;
    top: 0;
    left: 0;
    align-items: center;
    align-content: center;
    justify-content: center;
    flex-direction: column;
  }
  
  .loader,
  .loader:before,
  .loader:after {
    border-radius: 50%;
    width: 2.5em;
    height: 2.5em;
    animation-fill-mode: both;
    animation: bblFadInOut 1.8s infinite ease-in-out;
  }
  
  .loader {
    color: #FFF;
    font-size: 7px;
    position: relative;
    text-indent: -9999em;
    transform: translateZ(0);
    animation-delay: -0.16s;
  }
  
  .loader:before,
  .loader:after {
    content: '';
    position: absolute;
    top: 0;
  }
  
  .loader:before {
    left: -3.5em;
    animation-delay: -0.32s;
  }
  
  .loader:after {
    left: 3.5em;
  }
  
  @keyframes bblFadInOut {
  
    0%,
    80%,
    100% {
      box-shadow: 0 2.5em 0 -1.3em
    }
  
    40% {
      box-shadow: 0 2.5em 0 0
    }
  }