.spinner {
    width: 100px;
    height: 100px;
    border: 20px solid #f3f3f3;
    border-top: 20px solid #9ecae1;
    border-radius: 90%;
    animation: spin 1s linear infinite;
}

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


#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
}

#loading-overlay.show {
  opacity: 1;
  visibility: visible;
}

.progress-message {
  margin-top: 20px;
  font-size: 14px;
  color: #666;
  text-align: center;
}