@keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
}
@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}
.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

.btn-primary {
  display: inline-block;        /* permet de définir largeur et centrage */
  width: 100%;                  /* w-full */
  background-color: #173390;    /* bg-primary (bleu Tailwind par défaut) */
  color: #fff;                  /* text-white */
  padding: 10px 0;              /* py-2 */
  border: none;
  border-radius: 0.5rem;        /* rounded-lg */
  text-align: center;           /* centre le texte */
  text-decoration: none;        /* retire le soulignement du lien */
  font-weight: 500;
  transition: background-color 0.3s ease; /* transition-colors */
  cursor: pointer;
}

.btn-primary:hover {
  background-color: #1e40af;    /* hover:bg-blue-800 */
}