#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #fff;
  z-index: 1001;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.5s ease;
  opacity: 1;
  pointer-events: all;
}

#preloader.hide {
  opacity: 0;
  pointer-events: none;
}

.page-loader {
  border: 4px solid #f3f3f3;
  border-top: 4px solid #1d4ed8;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
}

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