.custom-image-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    max-width: 1200px;
    margin: 20px auto;
}

.custom-image-gallery img,
.custom-image-gallery video {
    width: 100%;
    border-radius: 8px;
    cursor: pointer;
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 999999;
}

.lightbox img {
    max-width: 90%;
    max-height: 80%;
    border-radius: 10px;
}

.lightbox .close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 40px;
    color: white;
    cursor: pointer;
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    font-size: 60px;
    color: white;
    cursor: pointer;
    user-select: none;
}

.lightbox .prev { left: 40px; }
.lightbox .next { right: 40px; }

/* Responsive */
@media (max-width: 1024px) {
    .custom-image-gallery {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .custom-image-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}