html, body {
  height: 100%;
  min-height: 100%;
}

.loading-icon {
  height: 100%;
  min-height: 100%;
  display: -ms-flex;
  display: -webkit-flex;
  display: flex;
  -ms-align-items: center;
  -webkit-align-items: center;
  align-items: center;
  justify-content: center;
  -ms-align-items: center;
  -webkit-justify-content: center;
  background-color: transparent;
}