/* [THE LOADING SPINNER] */
#spinner-front, #spinner-back{
  position: fixed;
  visibility: hidden;
  opacity: 0;
  width: 100%;
  transition: all 1s;
}
#spinner-front{
  z-index: 999;
  margin-top: 45vh;
  color: #fff;
  text-align: center;
}
#spinner-back{
  z-index: 998;
  height: 300vh;
  background: #000;
}
#spinner-front.show{
  visibility: visible;
  opacity: 1;
}
#spinner-back.show{
  visibility: visible;
  opacity: 0.7;
}