#serra .hover-overlay {
    position: relative;
    overflow: hidden;
}

#serra .hover-overlay-text {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.55); /* overlay scuro semi-trasparente */
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
    pointer-events: none; /* non blocca il click sul link/fancybox */
    z-index: 2;
}

#serra .hover-overlay-text span {
    color: #ffffff;
    font-size: 18px;
    font-weight: 600;
    /*letter-spacing: 1px;*/
    text-align: center;
    padding: 0 20px;
    transform: translateY(15px);
    transition: transform 0.35s ease;
}

#serra .hover-overlay:hover .hover-overlay-text {
    opacity: 1;
    visibility: visible;
}

#serra .hover-overlay:hover .hover-overlay-text span {
    transform: translateY(0);
}