/* ==========================================
   Reference Gallery
   ========================================== */

.reference-gallery {
    display: grid;
    gap: 0.5rem;
}

.reference-gallery-cols-3 { grid-template-columns: repeat(3, 1fr); }
.reference-gallery-cols-4 { grid-template-columns: repeat(4, 1fr); }
.reference-gallery-cols-5 { grid-template-columns: repeat(5, 1fr); }
.reference-gallery-cols-6 { grid-template-columns: repeat(6, 1fr); }

/* Gallery item */
.reference-gallery-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    border: none;
    padding: 0;
    background: #f0f0f0;
    display: block;
    width: 100%;
    text-align: left;
}

.reference-gallery-ratio-4-3 { aspect-ratio: 4 / 3; }
.reference-gallery-ratio-1-1 { aspect-ratio: 1 / 1; }

.reference-gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.reference-gallery-item:hover .reference-gallery-img,
.reference-gallery-item:focus .reference-gallery-img {
    transform: scale(1.05);
}

/* Overlay: title always visible at bottom, description fades in on hover */
.reference-gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.75rem;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 100%);
    color: #fff;
    transition: padding 0.3s ease;
}

.reference-gallery-title {
    font-size: 1.25rem;
    font-weight: 700;
    text-transform: uppercase;
    margin: 0;
    color: #fff;
    line-height: 1.3;
}

/* No H2 underline on gallery titles */
.reference-gallery-title > span::after {
    display: none !important;
}

.reference-gallery-description {
    font-size: 1.1rem;
    line-height: 1.4;
    margin: 0.25rem 0 0;
    color: rgba(255,255,255,0.9);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease;
}

.reference-gallery-item:hover .reference-gallery-description,
.reference-gallery-item:focus .reference-gallery-description {
    max-height: 4em;
    opacity: 1;
}

/* ==========================================
   Lightbox
   ========================================== */

.reference-lightbox {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.reference-lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
}

.reference-lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    z-index: 1;
}

.reference-lightbox-img {
    max-width: 90vw;
    max-height: 80vh;
    object-fit: contain;
    display: block;
}

.reference-lightbox-close {
    position: absolute;
    top: -2rem;
    right: 0;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.25rem 0.5rem;
}

.reference-lightbox-caption {
    color: #fff;
    text-align: center;
    padding: 0.75rem 0;
}

.reference-lightbox-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
    color: #fff;
}

.reference-lightbox-description {
    font-size: 0.9rem;
    margin: 0.25rem 0 0;
    color: rgba(255,255,255,0.8);
}

/* Responsive */
@media (max-width: 991px) {
    .reference-gallery-cols-5,
    .reference-gallery-cols-6 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 575px) {
    .reference-gallery-cols-3,
    .reference-gallery-cols-4,
    .reference-gallery-cols-5,
    .reference-gallery-cols-6 {
        grid-template-columns: repeat(2, 1fr);
    }

    .reference-gallery-title {
        font-size: 0.75rem;
    }
}