body { 
    font-family: sans-serif; 
    margin: 20px; 
}

.nav-boutons {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

/* Boutons avec dégradé bleu-gris */
.bouton_nav {
    padding: 10px 20px;
    font-weight: 500;
    border: none;
    border-radius: 25px;
    background: linear-gradient(135deg, #3a7bd5, #b0c4de); /* bleu vif -> bleu-gris clair */
    color: white;
    text-decoration: none;
    transition: background 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

/* Effet au survol : plus lumineux */
.bouton_nav:hover {
    background: linear-gradient(135deg, #1e3c72, #a0b8c9); /* bleu foncé -> gris bleuté */
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

/* Responsive : empile les boutons */
@media (max-width: 768px) {
    .nav-boutons {
        justify-content: center;
    }

    .bouton_nav {
        width: 100%;
        text-align: center;
    }
}