body {
  padding: 0;
  margin: 0;
}

#preloader {
  width: 100vw;
  height: 100vh;
  display: flex;
  z-index: 9999;
  align-items: center;
  justify-content: center;
  background-color: whitesmoke;
}

@keyframes beat {
  0% {
    transform: scale(0.75);
  }
  20% {
    transform: scale(1);
  }
  40% {
    transform: scale(0.75);
  }
  60% {
    transform: scale(1);
  }
  80% {
    transform: scale(0.75);
  }
  100% {
    transform: scale(0.75);
  }
}

#preloader > .preloader-img {
  width: 180px;
  animation: beat 6s infinite;
}