html,
body,
#app {
  height: 100%;
  margin: 0px;
  padding: 0px;
}

#loader-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 999999;
}

#loader {
  display: block;
  position: relative;
  left: 50%;
  top: 50%;
  width: 200px;
  height: 200px;
  margin-left: -100px;
  margin-top: -100px;
  background: url('./loading.gif') no-repeat 0 0 / 100%;
}