.preloader {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .loaded_hiding .preloader {
    transition: 0.3s opacity;
    opacity: 0;
  }
  
  .loaded .preloader {
    display: none;
  }