/**
 * 侧边栏额外样式
 * 包含：侧边栏区块、菜单、目录、操作按钮等
 */

/* ========================================
   侧边栏区块
   ======================================== */
.sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.sidebar-section-header {
    margin-bottom: var(--spacing-sm);
}

.sidebar-section-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: #ffffff;
    margin: 0;
}

.sidebar-section-body {
    /* 留白 */
}

.sidebar-text {
    font-size: var(--font-size-sm);
    color: #b0b0b0;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

/* ========================================
   侧边栏菜单
   ======================================== */
.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    color: #e0e0e0;
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.sidebar-menu-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.sidebar-menu-item.active {
    background-color: var(--color-primary);
    color: #ffffff;
}

/* ========================================
   侧边栏目录（TOC）
   ======================================== */
.sidebar-toc {
    /* 目录容器 */
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    margin-bottom: var(--spacing-xs);
}

.toc-list a {
    display: block;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    color: #b0b0b0;
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    border-left: 2px solid transparent;
}

.toc-list a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-left-color: var(--color-primary);
}

.toc-list a.active {
    background-color: rgba(145, 53, 0, 0.2);
    color: var(--color-primary-light);
    border-left-color: var(--color-primary);
}

/* ========================================
   侧边栏操作按钮
   ======================================== */
.sidebar-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.sidebar-actions .btn {
    flex: 1;
    min-width: 120px;
}

/* ========================================
   侧边栏收藏夹列表
   ======================================== */
.collections-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.collections-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    color: #e0e0e0;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.collections-list li:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.collections-list li.active {
    background-color: var(--color-primary);
    color: #ffffff;
}

.collection-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.collection-count {
    margin-left: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: #808080;
}

/* ========================================
   侧边栏知识图谱
   ======================================== */
.knowledge-graph {
    width: 100%;
    height: 200px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #808080;
    font-size: var(--font-size-sm);
}

/* ========================================
   侧边栏文献列表
   ======================================== */
.documents-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.documents-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    color: #e0e0e0;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.documents-list li:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.document-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-primary-light);
}

.document-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ========================================
   侧边栏图片专辑
   ======================================== */
.albums-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.album-thumb {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.album-thumb:hover {
    transform: scale(1.05);
}

/* ========================================
   侧边栏滚动条样式
   ======================================== */
.sidebar-content::-webkit-scrollbar {
    width: 6px;
}

.sidebar-content::-webkit-scrollbar-track {
    background-color: transparent;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* ========================================
   侧边栏响应式
   ======================================== */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
    }

    .albums-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ========================================
   侧边栏用户信息卡片
   ======================================== */
.sidebar-user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.sidebar-user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.sidebar-user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-user-name {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: #ffffff;
    margin: 0 0 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-user-level {
    font-size: var(--font-size-xs);
    color: var(--color-primary-light, #ff9a5c);
    background-color: rgba(145, 53, 0, 0.2);
    padding: 1px 8px;
    border-radius: 10px;
    display: inline-block;
}

/* ========================================
   侧边栏统计行
   ======================================== */
.sidebar-stats-row {
    display: flex;
    gap: 0;
    padding: 0;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.sidebar-stat-item {
    flex: 1;
    text-align: center;
    padding: 10px 4px;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-stat-item:last-child {
    border-right: none;
}

.sidebar-stat-num {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
}

.sidebar-stat-label {
    display: block;
    font-size: var(--font-size-xs);
    color: #808080;
    margin-top: 2px;
}

/* ========================================
   侧边栏登录提示
   ======================================== */
.sidebar-login-prompt {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
}

.sidebar-login-prompt svg {
    color: #606060;
    margin-bottom: var(--spacing-sm);
}

.sidebar-login-prompt p {
    font-size: var(--font-size-sm);
    color: #b0b0b0;
    margin-bottom: var(--spacing-md);
}

/* ========================================
   侧边栏"更多"链接 / 模式切换按钮
   ======================================== */
.sidebar-more {
    font-size: var(--font-size-xs);
    color: var(--color-primary-light, #ff9a5c);
    text-decoration: none;
    white-space: nowrap;
}

.sidebar-more:hover {
    text-decoration: underline;
}

.sidebar-switch-btn {
    font-size: var(--font-size-xs);
    color: #b0b0b0;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    white-space: nowrap;
    transition: color var(--transition-fast);
}

.sidebar-switch-btn:hover {
    color: var(--color-primary-light, #ff9a5c);
}

/* ========================================
   侧边栏加载/错误状态
   ======================================== */
.sidebar-loading,
.sidebar-error {
    text-align: center;
    padding: 40px 20px;
    color: #808080;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-primary, #913500);
    border-radius: 50%;
    animation: sidebar-spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

@keyframes sidebar-spin {
    to { transform: rotate(360deg); }
}

.sidebar-error svg {
    color: #e05555;
    margin-bottom: 12px;
}

.sidebar-error p {
    margin-bottom: 12px;
}

/* ========================================
   侧边栏基础布局（open 状态 + 遮罩）
   ======================================== */
.sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 320px;
    height: 100vh;
    background-color: #1a1a2e;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.3);
}

.sidebar.open {
    transform: translateX(0);
}

body.sidebar-open::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.45);
    z-index: 999;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
}

.sidebar-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: #ffffff;
    margin: 0;
}

.sidebar-close {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-close:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.1);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}