/* Fullscreen overlay loader */
#loader-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(255, 255, 255, 0.7);
  z-index: 9999;
  display: none;
  justify-content: center;
  align-items: center;
  cursor: wait;
}

#loader-overlay .spinner {
  border: 6px solid #f3f3f3;
  border-top: 6px solid #3c8dbc; /* Django admin blue */
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
}

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