.overlay {
    position: fixed;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background: rgba(70,20,15,0.3);
    z-index: 1000!important;
    background-image: url(../images/loading1.gif);
    background-repeat: no-repeat;
    background-position: center center;
    background-size: 100px;
  }