#overlay {
    position: fixed;
    display: none;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color:#000;
    z-index: 1102;
    cursor: pointer;
    opacity:0.5;
    text-align:center;
  }
  
  #overlay img{
   display: block;
   margin: 15% auto;
  }
  
  .centrado{
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
  }