#preloader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #00000050;
  backdrop-filter: grayscale(100%);
  opacity: 0.7;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: all 2s ease-in-out;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 5px solid #1e9dd8;
  border-top-color: #1a1a1a;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  backdrop-filter: grayscale(100%);
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}