.smart-gallery {
    padding: 60px 0;
    background: #111;
    font-family: Arial, sans-serif;
}

.section-title {
    text-align: center;
    color: #fff;
    margin-bottom: 40px;
    font-size: 28px;
}

/* Masonry Layout */
.gallery-grid {
    column-count: 4;
    column-gap: 15px;
    width: 90%;
    margin: auto;
}

.img-wrapper {
    break-inside: avoid;
    margin-bottom: 15px;
    overflow: hidden;
    border-radius: 12px;
    cursor: pointer;
}

.img-wrapper img {
    width: 100%;
    display: block;
    border-radius: 12px;
    transition: 0.4s ease;
}

.img-wrapper:hover img {
    transform: scale(1.05);
    opacity: 0.9;
}

/* Responsive */
@media (max-width: 1000px) {
    .gallery-grid { column-count: 3; }
}
@media (max-width: 700px) {
    .gallery-grid { column-count: 2; }
}
@media (max-width: 500px) {
    .gallery-grid { column-count: 1; }
}

/* Preview */
.image-preview-box {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.95);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.image-preview-box img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 15px;
}

.close-preview {
    position: absolute;
    top: 20px;
    right: 40px;
    font-size: 35px;
    color: #fff;
    cursor: pointer;
}