/**
 * Photo Album for Zibll - 样式系统
 * 
 * 功能特点：
 * - 完全响应式设计，支持移动端和桌面端
 * - 支持瀑布流和网格两种布局模式
 * - 深度集成Zibll主题的样式系统
 * - 支持深色主题和浅色主题切换
 * - 使用CSS变量实现主题定制
 * - 优化的动画效果和交互体验
 * 
 * @author 腾飞博客
 * @version 2.0.0
 * @since 2025
 */

/* ========================================
   1. CSS 变量定义 (CSS Custom Properties)
   使用CSS变量实现主题定制和响应式设计
   ======================================== */
:root {
    /* 基础颜色变量 */
    --photo-album-primary: var(--theme-color, #2196F3);
    --photo-album-primary-hover: var(--theme-color-2, #1976D2);
    --photo-album-secondary: var(--muted-color, #f5f5f5);
    --photo-album-text: var(--main-color, #333);
    --photo-album-text-light: var(--muted-2-color, #666);
    --photo-album-border: var(--main-border-color, #e0e0e0);
    --photo-album-bg: var(--main-bg-color, #fafafa);
    
    /* 深色主题颜色 */
    --photo-album-dark-bg: #2a2a2a;
    --photo-album-dark-text: #ffffff;
    --photo-album-dark-border: #404040;
    
    /* 布局变量 */
    --photo-album-container-max-width: 1200px;
    --photo-album-gap: 20px;
    --photo-album-border-radius: 8px;
    --photo-album-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --photo-album-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
    
    /* 动画变量 */
    --photo-album-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --photo-album-transition-fast: all 0.2s ease;
    
    /* 瀑布流变量 */
    --photo-album-masonry-columns: 4;
    --photo-album-masonry-columns-tablet: 3;
    --photo-album-masonry-columns-mobile: 2;
    --photo-album-masonry-columns-small: 1;
    --photo-album-masonry-gap: 20px;
    
    
    /* 侧边栏变量 */
    --photo-album-sidebar-width: 300px;
    --photo-album-sidebar-bg: var(--photo-album-bg);
    --photo-album-sidebar-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
}

/* ========================================
   深色主题变量覆盖
   支持Zibll主题的深色模式切换
   ======================================== */
body.dark-theme {
    --photo-album-bg: var(--photo-album-dark-bg);
    --photo-album-text: var(--photo-album-dark-text);
    --photo-album-border: var(--photo-album-dark-border);
    --photo-album-secondary: var(--muted-color-2, #404040);
    --photo-album-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --photo-album-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.4);
    --photo-album-sidebar-bg: var(--photo-album-dark-bg);
    --photo-album-sidebar-shadow: -2px 0 10px rgba(0, 0, 0, 0.3);
}

/* ========================================
   2. 基础重置和通用样式
   确保与Zibll主题的样式兼容性
   ======================================== */
.photo-album-container {
    max-width: var(--photo-album-container-max-width);
    margin: 0 auto;
    padding: 20px;
    font-family: inherit;
    line-height: 1.6;
    color: var(--photo-album-text);
}

.photo-album-container * {
    box-sizing: border-box;
}

/* ========================================
   3. 相册头部样式
   标题和描述区域的样式定义
   ======================================== */
.photo-album-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px 0;
    border-bottom: 1px solid var(--photo-album-border);
}

.photo-album-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin: 0 0 15px 0;
    color: var(--photo-album-text);
}

.photo-album-description {
    font-size: 1.1rem;
    color: var(--photo-album-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   4. 相册分组样式
   ======================================== */
.photo-album-section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.photo-album-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 相册分组描述 */
.album-section-description {
    margin: 0 auto 40px;
    padding: 20px;
    background: var(--photo-album-bg);
    border-radius: var(--photo-album-border-radius);
    border: 1px solid var(--photo-album-border);
    box-shadow: var(--photo-album-shadow);
    text-align: center;
    max-width: 800px;
}

.description-inner {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--photo-album-text-light);
}

/* ========================================
   5. 瀑布流布局系统
   ======================================== */
.masonry-container {
    display: grid;
    grid-template-columns: repeat(var(--photo-album-masonry-columns), 1fr);
    column-gap: var(--photo-album-masonry-gap); /* 只设置列间距 */
    row-gap: 0; /* 移除行间距 */
    margin: 0;
    padding: 0;
}

/* 瀑布流模式 - 使用CSS Columns实现真正的瀑布流 */
.masonry-container.display-mode-masonry {
    display: block; /* 改为block布局，不使用CSS Grid */
    column-count: var(--photo-album-masonry-columns);
    column-gap: var(--photo-album-masonry-gap);
    column-fill: balance;
}

/* 网格模式 - 统一高度 */
.masonry-container.display-mode-grid {
    grid-auto-rows: 1fr; /* 所有行等高 */
    gap: var(--photo-album-masonry-gap); /* 网格模式使用完整的gap */
}

.masonry-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--photo-album-border-radius);
    box-shadow: var(--photo-album-shadow);
    transition: var(--photo-album-transition);
    background: var(--photo-album-bg);
}

/* 瀑布流模式下的容器高度自适应 */
.display-mode-masonry .masonry-item {
    height: auto; /* 让容器高度根据内容自适应 */
    margin-bottom: var(--photo-album-masonry-gap); /* 添加底部间距 */
    display: block; /* 改为block布局 */
    break-inside: avoid; /* 防止图片被分割到不同列 */
    page-break-inside: avoid; /* 兼容性 */
}

/* 网格模式下的容器高度统一 */
.display-mode-grid .masonry-item {
    height: 100%; /* 填充网格行高度 */
    margin-bottom: 0; /* 网格模式不需要底部margin */
}

.masonry-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--photo-album-shadow-hover);
}

/* 响应式网格 */
@media screen and (max-width: 1200px) {
    .masonry-container {
        grid-template-columns: repeat(var(--photo-album-masonry-columns-tablet), 1fr);
    }
    
    /* 瀑布流模式响应式 */
    .masonry-container.display-mode-masonry {
        column-count: var(--photo-album-masonry-columns-tablet);
    }
}

@media screen and (max-width: 768px) {
    .masonry-container {
        grid-template-columns: repeat(var(--photo-album-masonry-columns-mobile), 1fr);
    }
    
    /* 瀑布流模式使用CSS Columns */
    .masonry-container.display-mode-masonry {
        column-count: var(--photo-album-masonry-columns-mobile);
        column-gap: 15px;
    }
    
    /* 网格模式使用完整gap */
    .masonry-container.display-mode-grid {
        gap: 15px;
    }
}

@media screen and (max-width: 480px) {
.masonry-container {
        grid-template-columns: repeat(var(--photo-album-masonry-columns-small), 1fr);
    }
    
    /* 瀑布流模式使用CSS Columns */
    .masonry-container.display-mode-masonry {
        column-count: var(--photo-album-masonry-columns-small);
        column-gap: 10px;
    }
    
    /* 网格模式使用完整gap */
    .masonry-container.display-mode-grid {
        gap: 10px;
    }
}

/* ========================================
   6. 图片容器和样式
   ======================================== */
.photo-inner {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    border-radius: var(--photo-album-border-radius);
}

.album-image {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--photo-album-transition);
    background: var(--photo-album-bg); /* 添加背景色填充空白区域 */
}

/* 图片描述容器 */
.photo-tooltip {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: 20px 15px 15px;
    border-radius: 0 0 var(--photo-album-border-radius) var(--photo-album-border-radius);
    opacity: 0;
    transform: translateY(10px);
    transition: var(--photo-album-transition);
    pointer-events: none;
    max-height: 60%;
    overflow-y: auto;
}

.photo-tooltip.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.tooltip-content {
    font-size: 0.9rem;
    line-height: 1.4;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* 瀑布流模式 - 保持图片完整显示 */
.display-mode-masonry .album-image {
    width: 100%;
    height: auto; /* 高度自适应，保持原始比例 */
    display: block;
}

/* 网格模式 - 填充容器，可能裁剪图片 */
.display-mode-grid .album-image {
    height: 100%;
    object-fit: cover;
}

.photo-inner:hover .album-image {
    transform: scale(1.05);
}

/* 图片标题 */
.photo-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0;
    padding: 15px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    font-size: 1rem;
    font-weight: 500;
    transform: translateY(100%);
    transition: var(--photo-album-transition);
}

.photo-inner:hover .photo-title {
    transform: translateY(0);
}


/* ========================================
   8. 查看控件样式
   ======================================== */
.view-image-control {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--photo-album-transition);
    z-index: 5;
}

/* 查看控件位置 */
.view-button-center .view-image-control {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.view-button-left .view-image-control {
    top: 50%;
    left: 15px;
    transform: translateY(-50%);
}

.view-button-right .view-image-control {
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
}

.photo-inner:hover .view-image-control {
    opacity: 1;
}

/* 查看图标样式 */
.view-image-icon {
    width: 45px;
    height: 45px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: var(--photo-album-transition);
    backdrop-filter: blur(10px);
}

.view-image-icon:hover {
    background: var(--photo-album-primary);
    transform: scale(1.1);
}

.view-image-icon i {
    font-size: 18px;
}

/* 查看按钮样式 */
.view-image-button {
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 25px;
    color: white;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--photo-album-transition);
    backdrop-filter: blur(10px);
}

.view-image-button:hover {
    background: var(--photo-album-primary);
    transform: scale(1.05);
}

/* ========================================
   9. 加载更多功能
   ======================================== */
.load-more-container {
    text-align: center;
    margin: 40px 0;
}

.load-more-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    background: var(--photo-album-primary);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--photo-album-transition);
    box-shadow: var(--photo-album-shadow);
}

.load-more-button:hover {
    background: var(--photo-album-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--photo-album-shadow-hover);
}

.load-more-count {
    font-size: 0.9em;
    opacity: 0.8;
}

.load-more-loading {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    color: var(--photo-album-text-light);
}

/* 加载指示器 */
.loading-indicator {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 40px;
    color: var(--photo-album-text-light);
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--photo-album-border);
    border-top: 3px solid var(--photo-album-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1rem;
    font-weight: 500;
}

/* ========================================
   10. 侧边栏系统
   ======================================== */
.album-sidebar {
    position: fixed;
    top: 0;
    left: -300px;
    width: var(--photo-album-sidebar-width);
    height: 100vh;
    background: var(--photo-album-sidebar-bg);
    box-shadow: var(--photo-album-sidebar-shadow);
    transition: var(--photo-album-transition);
    z-index: 1000;
    overflow-y: auto;
}

.album-sidebar.show {
    left: 0;
}

.album-sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--photo-album-border);
    background: var(--photo-album-primary);
    color: white;
}

.album-sidebar-title {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.album-sidebar-body {
    padding: 20px;
}

/* 相册列表 */
.album-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.album-list-item {
    padding: 15px;
    background: var(--photo-album-bg);
    border: 1px solid var(--photo-album-border);
    border-radius: var(--photo-album-border-radius);
    cursor: pointer;
    transition: var(--photo-album-transition);
    color: var(--photo-album-text);
}

.album-list-item:hover {
    background: var(--photo-album-secondary);
    transform: translateX(5px);
}

.album-list-item.active {
    border: 2px solid var(--photo-album-primary);
    background: var(--photo-album-bg);
    color: var(--photo-album-text);
}

.album-list-item-title {
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--photo-album-text);
}

.album-list-item-desc {
    font-size: 0.9rem;
    opacity: 0.8;
    line-height: 1.4;
    color: var(--photo-album-text-light);
}

/* 相册描述区域 */
.album-section-description {
    margin-bottom: 30px;
    padding: 20px;
    background: var(--photo-album-bg);
    border: 1px solid var(--photo-album-border);
    border-radius: var(--photo-album-border-radius);
    box-shadow: var(--photo-album-shadow);
}

.description-inner {
    color: var(--photo-album-text);
    line-height: 1.6;
    font-size: 1rem;
}

.description-inner p {
    margin: 0 0 15px 0;
}

.description-inner p:last-child {
    margin-bottom: 0;
}

/* ========================================
   11. 侧边栏切换按钮
   ======================================== */
.album-switcher {
    position: fixed;
    top: 50%;
    left: 0;
    width: 40px;
    height: 60px;
    background: var(--photo-album-primary);
    color: white;
    border: none;
    border-radius: 0 8px 8px 0;
    cursor: pointer;
    transition: var(--photo-album-transition);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--photo-album-shadow);
}

.album-switcher:hover {
    width: 50px;
    background: var(--photo-album-primary-hover);
}

.album-switcher.active {
    left: var(--photo-album-sidebar-width);
}

.album-switcher i {
    font-size: 18px;
    transition: var(--photo-album-transition);
}

.album-switcher.active i {
    transform: rotate(180deg);
}

/* 切换按钮样式变体 */
/* 经典样式使用默认样式，无需额外定义 */

.album-switcher.style-minimal {
    width: 6px;
    background: var(--photo-album-text-light);
}

.album-switcher.style-minimal:hover {
    width: 8px;
    background: var(--photo-album-primary);
}


/* ========================================
   12. 框架样式
   ======================================== */
.frame-simple .masonry-item {
    border: 1px solid var(--photo-album-border);
}

.frame-elegant .masonry-item {
    border: 2px solid var(--photo-album-primary);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.frame-modern .masonry-item {
    border-radius: 12px;
    overflow: hidden;
}

.frame-minimal .masonry-item {
    border: none;
    box-shadow: none;
    background: transparent;
}

/* ========================================
   14. 空状态样式
   ======================================== */
.no-photos-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--photo-album-text-light);
}

.no-photos-message p {
    font-size: 1.1rem;
    margin: 0;
}

/* ========================================
   15. 响应式优化
   ======================================== */
@media screen and (max-width: 768px) {
    .photo-album-container {
        padding: 15px;
    }
    
    .photo-album-title {
        font-size: 2rem;
    }
    
    .album-section-description {
        margin-bottom: 30px;
        padding: 15px;
    }
    
    .album-sidebar {
        width: 280px;
        left: -280px;
        /* 移动端优化：支持触摸滑动 */
        touch-action: pan-y;
        -webkit-overflow-scrolling: touch;
    }
    
    .album-switcher.active {
        left: 280px;
    }
    
    /* 移动端：侧边栏打开时隐藏切换按钮 */
    .album-sidebar.show ~ .album-switcher {
        display: none;
    }
    
    /* 移动端：侧边栏滑动效果优化 */
    .album-sidebar {
        transition: transform 0.3s ease, opacity 0.3s ease;
    }
    
    /* 移动端：侧边栏内容区域优化 */
    .album-sidebar-body {
        padding: 15px;
    }
    
    .album-list-item {
        padding: 12px;
        font-size: 0.95rem;
    }
}

@media screen and (max-width: 480px) {
    .photo-album-container {
        padding: 10px;
    }
    
    .photo-album-title {
        font-size: 1.8rem;
    }
    
    .album-sidebar {
        width: 100vw;
        left: -100vw;
        /* 小屏幕移动端：全屏侧边栏 */
        z-index: 1002;
    }
    
    .album-switcher {
        width: 35px;
        height: 50px;
    }
    
    .album-switcher:hover {
        width: 40px;
    }
    
    /* 小屏幕移动端：侧边栏内容进一步优化 */
    .album-sidebar-body {
        padding: 12px;
    }
    
    .album-list-item {
        padding: 10px;
        font-size: 0.9rem;
    }
    
    .album-list-item-title {
        font-size: 1rem;
    }
    
    .album-list-item-desc {
        font-size: 0.85rem;
    }
}

/* ========================================
   16. 辅助类
   ======================================== */
.photo-album-hidden {
    display: none;
}

.photo-album-fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

.photo-album-loading {
    opacity: 0.6;
    pointer-events: none;
}

/* ========================================
   17. 打印样式
   ======================================== */
@media print {
    .album-sidebar,
    .album-switcher,
    .load-more-container {
        display: none;
    }
    
    .masonry-container {
        display: block;
    }
    
    .masonry-item {
        break-inside: avoid;
        margin-bottom: 20px;
    }
}

/* ========================================
   18. 高对比度模式支持
   ======================================== */
@media (prefers-contrast: high) {
    .masonry-item {
        border: 2px solid var(--photo-album-text);
    }
    
    .album-list-item {
        border: 2px solid var(--photo-album-text);
    }
    
}

/* ========================================
   19. 图片可点击样式
   ======================================== */
.masonry-item img {
    cursor: pointer;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.masonry-item img:hover {
    transform: scale(1.02);
    opacity: 0.9;
}

/* ========================================
   20. 减少动画模式支持
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms;
        animation-iteration-count: 1;
        transition-duration: 0.01ms;
    }
}

/* ========================================
   21. Zibll主题夜间模式支持
   ======================================== */

/* 确保在夜间模式下文字颜色正确显示 */
body.dark-theme .album-sidebar .album-list-item {
    color: var(--main-color);
}

body.dark-theme .album-sidebar .album-list-item-title {
    color: var(--main-color);
}

body.dark-theme .album-sidebar .album-list-item-desc {
    color: var(--muted-2-color);
}

/* 夜间模式下选中状态的样式 */
body.dark-theme .album-sidebar .album-list-item.active {
    border: 2px solid var(--photo-album-primary);
    background: var(--main-bg-color);
    color: var(--main-color);
}

body.dark-theme .album-section-description .description-inner {
    color: var(--main-color);
}

body.dark-theme .album-section-description .description-inner p {
    color: var(--main-color);
}

/* 夜间模式下图片描述容器样式 */
body.dark-theme .photo-tooltip {
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    color: #ffffff;
}