/* 
 * Gallery Grid Section - Modern Premium Design
 */

.gallery-grid-section {
    background: #f8fafc;
    padding: 6rem 0;
    position: relative;
}

/* Filters */
.gallery-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: #64748b;
    border: 2px solid #e2e8f0;
    border-radius: 99px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: #2563eb;
    transition: width 0.3s ease;
    z-index: -1;
}

.filter-btn:hover,
.filter-btn.active {
    color: white;
    border-color: #2563eb;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.filter-btn:hover::before,
.filter-btn.active::before {
    width: 100%;
}

/* Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    grid-auto-flow: dense;
}

.gallery-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background: #ffffff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    aspect-ratio: 4/3;
    cursor: pointer;
}

.gallery-item.hidden {
    display: none;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.gallery-link {
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
}

.gallery-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-link:hover img {
    transform: scale(1.1);
}

/* Overlay */
.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.2) 50%, rgba(0, 0, 0, 0) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-link:hover .gallery-overlay {
    opacity: 1;
}

.gallery-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.gallery-link:hover .gallery-icon {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.gallery-caption {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    transform: translateY(20px);
    transition: transform 0.3s ease 0.1s;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.gallery-category-tag {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
    transform: translateY(20px);
    transition: transform 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.gallery-link:hover .gallery-caption,
.gallery-link:hover .gallery-category-tag {
    transform: translateY(0);
}

/* Lightbox */
.lightbox-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.95);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    backdrop-filter: blur(8px);
}

.lightbox-backdrop.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.lightbox-content {
    max-width: 90vw;
    max-height: 85vh;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    overflow: hidden;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    display: block;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    backdrop-filter: blur(4px);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    backdrop-filter: blur(4px);
}

.lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
    left: 30px;
}

.lightbox-next {
    right: 30px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 1rem;
    }

    .gallery-filters {
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    .lightbox-nav {
        width: 40px;
        height: 40px;
    }

    .lightbox-prev {
        left: 10px;
    }

    .lightbox-next {
        right: 10px;
    }
}