#loader {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.2s, visibility 0.2s;
  z-index: 99999;
  background-color: #fff;
  overflow: hidden;
}