.preloader {
  align-items: center;
  background: #ffffff;
  display: flex;
  height: 100vh;
  justify-content: center;
  left: 0;
  position: fixed;
  top: 0;
  opacity: 1;
  transition: opacity 0.3s linear;
  width: 100%;
  z-index: 9999;
}