.spinner-container {
  display: none
}

.spinner-container.show {
  display: flex;
  align-items: center;
  height: 100%;
}

.spinner {
    width: 40px;
    height: 40px;
  
    position: relative;
    margin: 100px auto;
  }
  
  .double-bounce1, .double-bounce2 {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #333;
    opacity: 0.6;
    position: absolute;
    top: 0;
    left: 0;
    
    -webkit-animation: sk-bounce 2.0s infinite ease-in-out;
    animation: sk-bounce 2.0s infinite ease-in-out;
  }
  
  .double-bounce2 {
    -webkit-animation-delay: -1.0s;
    animation-delay: -1.0s;
  }
  
  @-webkit-keyframes sk-bounce {
    0%, 100% { -webkit-transform: scale(0.0) }
    50% { -webkit-transform: scale(1.0) }
  }
  
  @keyframes sk-bounce {
    0%, 100% { 
      transform: scale(0.0);
      -webkit-transform: scale(0.0);
    } 50% { 
      transform: scale(1.0);
      -webkit-transform: scale(1.0);
    }
  }