.loader {
    position: fixed;
    background-color: #fff;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 1;
    visibility: visible;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    z-index: 999;
    -webkit-transition: 0.5s all;
    transition: 0.5s all;
  }