.gallery-img {
    width: 100%;
    height: 400px;        /* la altura que elegiste */
    object-fit: cover;
    border-radius: 12px;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

/* Contenedor para evitar que la imagen "salga" de la card */
.card {
    overflow: hidden;
    border-radius: 12px;
}

/* Efecto hover */
.card:hover .gallery-img {
    transform: scale(1.07);           /* pequeño zoom */
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

.lightbox-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    font-size: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.lightbox-prev {
    left: 16px;
}

.lightbox-next {
    right: 16px;
}

.lightbox-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}