/* ============================================================
   CoreNet Systems — Gallery Stylesheet
   ============================================================ */

/* ---------- Gallery Page ---------- */
.gallery-page {
    padding: calc(var(--navbar-height) + var(--spacing-16)) 0 var(--spacing-20);
    background: var(--color-bg-light);
    min-height: 100vh;
}

/* ---------- Album Grid ---------- */
.gallery__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

@media (min-width: 640px) {
    .gallery__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .gallery__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ---------- Album Card ---------- */
.album-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition);
    display: block;
}

.album-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
    color: inherit;
}

.album-card__image {
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-bg-light);
}

.album-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.album-card:hover .album-card__image img {
    transform: scale(1.05);
}

.album-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.album-card__info {
    padding: var(--spacing-5) var(--spacing-6);
}

.album-card__title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: var(--spacing-1);
}

.album-card__desc {
    font-size: var(--text-sm);
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--spacing-2);
}

.album-card__count {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ---------- Empty State ---------- */
.gallery-empty {
    text-align: center;
    padding: var(--spacing-16) var(--spacing-6);
    color: var(--color-text-muted);
}

.gallery-empty svg {
    margin-bottom: var(--spacing-4);
}

.gallery-empty p {
    font-size: var(--text-lg);
}

/* ---------- Album Detail ---------- */
.album-detail {
    padding: calc(var(--navbar-height) + var(--spacing-16)) 0 var(--spacing-20);
    background: var(--color-bg-light);
    min-height: 100vh;
}

.album-detail__back {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-blue);
    text-decoration: none;
    margin-bottom: var(--spacing-6);
    transition: color var(--transition-fast);
}

.album-detail__back:hover {
    color: var(--color-accent);
}

.album-detail__desc {
    font-size: var(--text-lg);
    color: var(--color-text-light);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: var(--spacing-10);
}

/* ---------- Photo Grid ---------- */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
}

@media (min-width: 640px) {
    .photo-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .photo-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.photo-grid__item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    background: var(--color-white);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}

.photo-grid__item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}

.photo-grid__item img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
}

.photo-grid__item:hover img {
    transform: scale(1.05);
}

.photo-grid__caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-3) var(--spacing-4);
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: var(--color-white);
    font-size: var(--text-xs);
    font-weight: 500;
    opacity: 0;
    transition: opacity var(--transition);
}

.photo-grid__item:hover .photo-grid__caption {
    opacity: 1;
}

/* ---------- Lightbox ---------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox[hidden] {
    display: none;
}

.lightbox__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
}

.lightbox__content {
    position: relative;
    z-index: 1;
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox__img {
    max-width: 90vw;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 4px;
}

.lightbox__caption {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--text-sm);
    margin-top: var(--spacing-3);
    text-align: center;
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
    position: absolute;
    z-index: 2;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: color 0.15s, transform 0.15s;
    padding: 0.5rem;
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
    color: #ffffff;
    transform: scale(1.1);
}

.lightbox__close {
    top: 1.5rem;
    right: 1.5rem;
    font-size: 2.5rem;
    line-height: 1;
}

.lightbox__prev {
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    line-height: 1;
}

.lightbox__next {
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    line-height: 1;
}

.lightbox__prev:hover {
    transform: translateY(-50%) scale(1.1);
}

.lightbox__next:hover {
    transform: translateY(-50%) scale(1.1);
}