#spinner-overlay {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  width: 50vw;
  height: 10vh;
  background: #ffffff;
  z-index: 9999;
  justify-content: center;
  align-items: center;
  transform: translate(-50%, -50%);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  padding: 1rem;
}


.spinner {
  border: 3px solid #f3f3f3; /* Light grey */
  border-top: 3px solid #3498db; /* Blue */
  border-radius: 50%;
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
}

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