.loader {
  position: absolute;
  top: 0px;
  right: 0px;
  bottom: 0px;
  left: 0px;
  width: 100%;
  max-height: 100%;
  z-index: 9999;
}

.loader > * {
  position: absolute;
  top: 0px;
  right: 0px;
  bottom: 0px;
  left: 0px;
  margin: auto;
  color: #000;
}