.loader-overlay {
    position: fixed;
    width: 100%;
    height: 100%;
    background: #000;
    opacity: .5;
    z-index: 1050;
  }
  
  .loader {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
    display: inline-block;
    width: 80px;
    height: 80px;
  }
  
  .loader:after {
    content: " ";
    display: block;
    width: 64px;
    height: 64px;
    margin: 8px;
    border-radius: 50%;
    border: 6px solid #fff;
    border-color: #fff transparent #fff transparent;
    animation: lds-dual-ring 1.2s linear infinite;
  
  }
  @keyframes lds-dual-ring {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
  }