body {
  display: flex;
  height: 90vh;
  font-family: sans-serif;
  /*background-image: url("bg3.jpg");
  background-size: 100%;*/
  /*background-position: center;
  background-repeat: no-repeat;*/
}


.number-slot {
  border: 2px solid black;
  font-family: Arial, sans-serif;
  font-size: 4em;
  line-height: 1.2em;
  overflow: hidden;
  height: 1.2em;
  text-align: center;
  width: 0.7em;
}
.number-slot .number {
  position: relative;
}

@keyframes moveNumberOut {
  0% {margin-top: 0em;}
  30% {margin-top: -1.2em;}
  100% {margin-top: -1.2em;}
}
.move-number-out {
    animation: moveNumberOut 1.5s;
}


#background {
    width: 100%; 
    height: 100%; 
    position: fixed; 
    left: 0px; 
    top: 0px; 
    z-index: -1; /* Ensure div tag stays behind content; -999 might work, too. */
}


.sticky {
  /* padding: 0px;
  text-align: center;
  position: -webkit-sticky;
  position: sticky;
  bottom: 0; */
}