.loader-overlay {
  display: none;
  position: fixed;
  z-index: 999;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.8);
  justify-content: center;
  align-items: center;
}

.loader {
  border: 6px solid #ccc;
  border-top: 6px solid #1e88e5;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  animation: spin 1s linear infinite;
}

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