.loader {
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 1000ms ease-in-out;
    -webkit-transition: all 1000ms ease-in-out;
    -moz-transition: all 1000ms ease-in-out;
    -o-transition: all 1000ms ease-in-out;
    -ms-transition: all 1000ms ease-in-out;
  }
  
  .loader>img {
    max-width: 300px;
    height: auto;
  }
  
  .loader.hidden {
    animation: fadeOut 1s;
    animation-fill-mode: forwards;
}
  
  @keyframes fadeOut {
    100% {
      opacity: 0;
      visibility: hidden;
    }
  }