/* ========================================
   Gallery Page Styles
   相册页面样式 - 蔚蓝意式风格 + 中国风行楷
   ======================================== */

/* 相册页面主容器 */
.gallery-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* 页面头部 */
.gallery-page-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.gallery-page-title {
    font-family: var(--font-wenkai, 'LXGW WenKai Lite', 'Noto Serif SC', Georgia, serif);
    font-size: 36px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 2px;
}

.gallery-page-subtitle {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    color: var(--color-gold, #4A8DB7);
    letter-spacing: 1px;
}

/* 分组筛选标签 */
.gallery-filter-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--spacing-xl);
    padding: 0 var(--spacing-sm);
}

.gallery-filter-tab {
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--color-gold, #4A8DB7);
    border-radius: 24px;
    color: var(--color-gold, #4A8DB7);
    font-family: var(--font-body);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
}

.gallery-filter-tab:hover {
    background: rgba(74, 141, 183, 0.08);
    transform: translateY(-1px);
}

.gallery-filter-tab.active {
    background: linear-gradient(135deg, var(--color-gold, #4A8DB7) 0%, var(--color-accent, #2E6E8F) 100%);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 12px rgba(74, 141, 183, 0.3);
}

/* 瀑布流网格 */
.gallery-masonry {
    columns: 3;
    column-gap: 16px;
    min-height: 200px;
}

@media (max-width: 768px) {
    .gallery-masonry {
        columns: 2;
        column-gap: 12px;
    }
}

@media (max-width: 480px) {
    .gallery-masonry {
        columns: 1;
    }
}

/* 瀑布流项目 */
.gallery-masonry-item {
    break-inside: avoid;
    margin-bottom: 16px;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    position: relative;
    background: var(--color-card);
    box-shadow: var(--shadow);
    transition: transform 0.3s var(--ease-out-expo), box-shadow 0.3s ease;
}

.gallery-masonry-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover), 0 8px 24px rgba(74, 141, 183, 0.15);
}

.gallery-masonry-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.4s var(--ease-out-expo);
}

.gallery-masonry-item:hover img {
    transform: scale(1.03);
}

/* 项目遮罩层 */
.item-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px 16px 16px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 60%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-masonry-item:hover .item-overlay {
    opacity: 1;
}

.item-overlay h4 {
    font-family: var(--font-wenkai, 'LXGW WenKai Lite', 'Noto Serif SC', serif);
    font-size: 0.9375rem;
    font-weight: 500;
    color: #fff;
    margin: 0 0 4px;
    line-height: 1.4;
}

.item-overlay p {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
    line-height: 1.4;
}

/* 加载更多区域 */
.gallery-load-more {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: var(--spacing-xl) 0;
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.gallery-loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-gold, #4A8DB7);
    border-radius: 50%;
    animation: gallerySpinner 0.8s linear infinite;
}

@keyframes gallerySpinner {
    to {
        transform: rotate(360deg);
    }
}

/* 空状态 */
.gallery-empty {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--color-text-light);
}

.gallery-empty p {
    font-size: 1rem;
    font-family: var(--font-wenkai, 'LXGW WenKai Lite', 'Noto Serif SC', serif);
}

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

.gallery-lightbox {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.gallery-lightbox.is-active {
    opacity: 1;
    visibility: visible;
}

.gallery-lightbox-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

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

.gallery-lightbox img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform 0.3s var(--ease-out-expo);
}

.gallery-lightbox.is-active img {
    transform: scale(1);
}

/* 灯箱信息区 */
.gallery-lightbox-info {
    margin-top: var(--spacing-md);
    text-align: center;
    max-width: 600px;
    padding: 0 var(--spacing-md);
}

.gallery-lightbox-info h3 {
    font-family: var(--font-wenkai, 'LXGW WenKai Lite', 'Noto Serif SC', serif);
    font-size: 1.125rem;
    font-weight: 500;
    color: #fff;
    margin: 0 0 8px;
}

.gallery-lightbox-info p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
    line-height: 1.5;
}

/* 灯箱控制按钮 */
.gallery-lightbox-close,
.gallery-lightbox-prev,
.gallery-lightbox-next {
    position: absolute;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-lightbox-close:hover,
.gallery-lightbox-prev:hover,
.gallery-lightbox-next:hover {
    color: #fff;
}

/* 关闭按钮 */
.gallery-lightbox-close {
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 2rem;
    line-height: 1;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

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

/* 导航按钮 */
.gallery-lightbox-prev,
.gallery-lightbox-next {
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 80px;
    font-size: 2.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.gallery-lightbox-prev {
    left: 20px;
}

.gallery-lightbox-next {
    right: 20px;
}

.gallery-lightbox-prev:hover,
.gallery-lightbox-next:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* 移动端灯箱适配 */
@media (max-width: 768px) {
    .gallery-lightbox-prev,
    .gallery-lightbox-next {
        width: 40px;
        height: 60px;
        font-size: 2rem;
    }
    
    .gallery-lightbox-prev {
        left: 8px;
    }
    
    .gallery-lightbox-next {
        right: 8px;
    }
    
    .gallery-lightbox-close {
        top: 12px;
        right: 12px;
        width: 40px;
        height: 40px;
        font-size: 1.75rem;
    }
    
    .gallery-lightbox-info h3 {
        font-size: 1rem;
    }
    
    .gallery-lightbox-info p {
        font-size: 0.875rem;
    }
}

/* 图片淡入动画 */
@keyframes galleryFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.gallery-masonry-item {
    animation: galleryFadeIn 0.4s ease forwards;
}