.loading {
  position: fixed;
  top: 0;
  width: 100%;
  height: 100vh;
  background-color: #fefefe;
  overflow: hidden;
  opacity: 1;
  z-index: 100;
}
#loader{
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}