*{
  margin: 0;
  padding: 0;
}
body {
  background-color: white;
  width: 100vw;
  height: 100vh;

  /* leave it to hide the scrollbars */
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
#progress-container{
  z-index: 10;
   position: absolute;
   display: flex;
   left: 0;
   top: 0;
   right: 0;
   bottom: 0;
   background-image: linear-gradient(#ddd, #888);
  align-items: center;
  justify-content: center;
}