/* Fondo oscuro al abrir imagen */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
}

/* Imagen grande */
.lightbox-overlay img {
    max-width: 90%;
    max-height: 80vh;
    border-radius: 12px;
    box-shadow: 0 0 25px rgba(255,255,255,0.2);
}