.step-nav {
    display: flex;
    justify-content: center;
    align-items: center;
}

.step-nav-btn {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid #dee2e6;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    font-size: 18px;
    margin: 0 2px;
    color: #333;
    transition: all 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.step-nav-btn:hover {
    background-color: #007bff;
    color: #ffffff;
    transform: translateY(-2px);
}

.step-nav-btn:disabled {
    color: #adb5bd;
    cursor: not-allowed;
    background-color: #e9ecef;
    transform: none;
    box-shadow: none;
}

.step-nav-btn-rect {
    width: auto;
    padding: 0 15px;
    border-radius: 20px;
}

/* --- NOUVELLE RÈGLE POUR MASQUER LES BOUTONS SUR SMARTPHONE --- */

@media (max-width: 767px) {
    #nav-btn-prev,
    #nav-btn-next,
    #nav-btn-next-fast {
        display: none;
    }
}