/**
 * 侧边栏样式
 * 左侧文章列表、文件夹展开/折叠
 */

/* 左侧边栏 */
.sidebar {
    width: 280px;
    min-width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s ease;
    position: relative;
    z-index: 10;
}

.sidebar.collapsed {
    margin-left: -280px;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
}

/* 左侧收缩按钮 */
.sidebar-toggle {
    position: absolute;
    left: 280px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 60px;
    border: 1px solid var(--border-color);
    border-left: none;
    background: var(--sidebar-bg);
    border-radius: 0 6px 6px 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--text-secondary);
    transition: left 0.3s ease, background 0.2s;
    z-index: 20;
}

.sidebar-toggle:hover {
    background: var(--hover-bg);
    color: var(--primary-color);
}

.sidebar.collapsed ~ .sidebar-toggle {
    left: 0;
}

/* 文章列表 */
.post-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
    list-style: none;
}

.post-list li {
    margin: 0;
}

/* 文件夹样式 */
.post-list li.folder {
    margin: 0;
}

.folder-toggle {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s;
    border-radius: 6px;
    margin: 2px 8px;
}

.folder-toggle:hover {
    background-color: var(--hover-bg);
}

.folder-icon {
    margin-right: 10px;
    font-size: 16px;
}

.folder-name {
    font-weight: 500;
    color: var(--text-color);
    font-size: 14px;
}

.folder-children {
    display: none;
    list-style: none;
    padding-left: 16px;
}

.folder.open > .folder-children {
    display: block;
}

/* 文件样式 */
.post-list li.file a {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 14px;
    border-radius: 6px;
    margin: 2px 8px;
}

.post-list li.file a:hover {
    background-color: var(--hover-bg);
    color: var(--primary-color);
}

.post-list li.file a.active {
    background-color: var(--primary-color);
    color: white;
}

.file-icon {
    margin-right: 10px;
    font-size: 16px;
}

.file-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 侧边栏底部 */
.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 8px;
}

.sidebar-footer-btn {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-color);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
}

.sidebar-footer-btn:hover {
    background: var(--hover-bg);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.sidebar-footer-btn svg {
    flex-shrink: 0;
}

/* 保持向后兼容 */
.theme-toggle {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-color);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
}

.theme-toggle:hover {
    background: var(--hover-bg);
    border-color: var(--primary-color);
    color: var(--primary-color);
}