custom_styles.css

._dash-loading-callback {
  font-family: sans-serif;
  padding-top: 50px;
  color: rgb(90, 90, 90);

  -webkit-animation: fadein 0.5s ease-in 7s forwards; /* Safari, Chrome and Opera > 12.1 */
     -moz-animation: fadein 0.5s; /* Firefox < 16 */
      -ms-animation: fadein 0.5s; /* Internet Explorer */
       -o-animation: fadein 0.5s; /* Opera < 12.1 */
          animation: fadein 0.5s ease-in 7s forwards;



  /* The banner */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.5);
  text-align: center;
  cursor: progress;
}


@keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Firefox < 16 */
@-moz-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Removes Undo Button
–––––––––––––––––––––––––––––––––––––––––––––––––– */
._dash-undo-redo {
  display: none;
}