7.1 Bouton animé

.animated-btn {
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.animated-btn:hover {
  transform: translateY(-2px) scale(1.01);
}

Valider

7.2 Animation de chargement

.spinner {
  width: 52px;
  height: 52px;
  border: 6px solid #dbeafe;
  border-top-color: #2563eb;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}