html, body {
  height: 100%;
}


body {
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}



.center {
    position: absolute;
    margin: auto;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;

  
    height: 30%;
  
}

.loading {
  position:absolute;
  z-index:-100;
  width: 100%;
  height: 100%;
}