/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.gallery-item {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: 12px;
    cursor: pointer;
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item img.loaded {
    opacity: 1;
}

.gallery-item .placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.05) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.lightbox-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    max-width: calc(100% - 160px);
    max-height: calc(100% - 100px);
}

.lightbox-image {
    max-width: 100%;
    max-height: calc(100vh - 150px);
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
    transition: opacity 0.3s ease;
}

.lightbox-counter {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    margin-top: 1rem;
    text-align: center;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 2.5rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease, transform 0.2s ease;
    z-index: 10001;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease, transform 0.2s ease;
    z-index: 10001;
}

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

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

/* Loading spinner */
.gallery-loader {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* No images message */
.gallery-empty {
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    padding: 2rem;
    grid-column: 1 / -1;
}

/* Responsive */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 0.4rem;
        padding: 0.5rem;
    }

    .lightbox-nav {
        width: 45px;
        height: 45px;
        font-size: 1.8rem;
    }

    .lightbox-prev {
        left: 10px;
    }

    .lightbox-next {
        right: 10px;
    }

    .lightbox-close {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 2rem;
    }

    .lightbox-content {
        max-width: calc(100% - 100px);
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}