/* =============================================
   GALLERY - Filterable grid + Lightbox
   ============================================= */

/* Filter buttons */
.gallery-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-8);
    justify-content: center;
}

.filter-btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background-color: var(--color-bg-light-alt);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-primary);
    color: var(--color-text-white);
    border-color: var(--color-primary);
}

/* Gallery grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
}

.gallery-item {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.gallery-item:hover {
    transform: scale(1.02);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.gallery-item:hover img {
    transform: scale(1.08);
}

.gallery-item__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 50%, rgba(0, 0, 0, 0.7));
    opacity: 0;
    transition: opacity var(--transition-fast);
    display: flex;
    align-items: flex-end;
    padding: var(--space-4);
}

.gallery-item:hover .gallery-item__overlay {
    opacity: 1;
}

.gallery-item__caption {
    color: var(--color-text-white);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    background-color: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox__image {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.lightbox__close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-white);
    font-size: var(--text-2xl);
    background: none;
    border: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.lightbox__close:hover {
    color: var(--color-primary);
}

.lightbox__caption {
    position: absolute;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text-light);
    font-size: var(--text-sm);
    text-align: center;
}

.lightbox__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-white);
    font-size: var(--text-2xl);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.lightbox__nav:hover {
    background: var(--color-primary);
}

.lightbox__prev {
    left: var(--space-4);
}

.lightbox__next {
    right: var(--space-4);
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (min-width: 576px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 992px) {
    .gallery-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-4);
    }
}

/* =============================================
   SERVICE PAGE GALLERY (masonry variant)
   ============================================= */

.service-gallery {
    background: var(--color-bg-light-alt, #f8f8f8);
}

.service-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3, 12px);
}

/* Remove uniform aspect-ratio for masonry feel */
.service-gallery-grid .gallery-item {
    aspect-ratio: auto;
}

.service-gallery-grid .gallery-item img {
    width: 100%;
    height: auto;
    display: block;
}

/* Vary heights for masonry look using nth-child */
.service-gallery-grid .gallery-item:nth-child(3n+1) {
    aspect-ratio: 4 / 3;
}

.service-gallery-grid .gallery-item:nth-child(3n+2) {
    aspect-ratio: 3 / 4;
}

.service-gallery-grid .gallery-item:nth-child(3n+3) {
    aspect-ratio: 1 / 1;
}

@media (min-width: 576px) {
    .service-gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 992px) {
    .service-gallery-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-4, 16px);
    }
}