.spinner {
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top: 4px solid #000;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  margin-top: -20px;
  margin-left: -20px;
  z-index: 1000;
}

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


.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.erreur-message {
    padding: 10px;
    margin-top: 10px;
    border: 1px solid red;
    background-color: #f8d7da;
    color: red;
}