.pulsanti-libri {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 20px 0;
}

.pulsante-libro {
    padding: 12px 18px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: transform .15s ease, box-shadow .15s ease;
}

.pulsante-libro:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,.15);
}