/* 侧边栏样式 */

/* ===== 侧边栏容器 ===== */
.sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--topbar-height));
    background: #fff;
    border-right: 1px solid #d9d9d9;
    overflow-y: auto;
    flex-shrink: 0;
    padding: 20px 0;
    z-index: 999;
}

/* ===== 侧边栏区域 ===== */
.sidebar-section {
    margin-bottom: 24px;
}

.sidebar-section h3 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: 0 20px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

/* ===== 导航列表 ===== */
.sidebar-section ul {
    list-style: none;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    font-size: 14px;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.nav-item.active {
    background: rgba(24, 144, 255, 0.1);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

.nav-item .icon {
    margin-right: 12px;
    font-size: 16px;
    width: 24px;
    text-align: center;
}

/* ===== 子菜单 ===== */
.sub-menu {
    display: none;
    padding-left: 56px;
}

.nav-item.expanded + .sub-menu {
    display: block;
}

.sub-menu-item {
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    border-radius: 4px;
    margin: 2px 8px;
}

.sub-menu-item:hover {
    color: var(--primary-color);
    background: var(--bg-color);
}

/* ===== 侧边栏底部信息 ===== */
.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.sidebar-info {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

.sidebar-version {
    font-size: 11px;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* ===== 侧边栏折叠功能 ===== */
.sidebar.collapsed {
    width: 60px;
}

.sidebar.collapsed .sidebar-section h3,
.sidebar.collapsed .nav-item span:not(.icon) {
    display: none;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 12px;
}

.sidebar.collapsed .nav-item .icon {
    margin-right: 0;
}

/* ===== 侧边栏切换按钮 ===== */
.sidebar-toggle {
    position: fixed;
    left: var(--sidebar-width);
    top: calc(var(--topbar-height) + 20px);
    width: 20px;
    height: 40px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-left: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: var(--transition);
}

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

.sidebar-toggle::before {
    content: '‹';
    font-size: 18px;
    color: var(--text-secondary);
}

.sidebar.collapsed + .content {
    margin-left: 60px;
}

/* ===== 侧边栏动画 ===== */
.sidebar {
    transition: width 0.3s ease;
}

/* ===== 活跃状态指示器 ===== */
.nav-item::after {
    content: '';
    position: absolute;
    right: 20px;
    width: 6px;
    height: 6px;
    background: var(--success-color);
    border-radius: 50%;
    opacity: 0;
    transition: var(--transition);
}

.nav-item.has-update::after {
    opacity: 1;
}

.nav-item.active::after {
    opacity: 0;
}

/* ===== 加载状态 ===== */
.sidebar-loading {
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
}

/* ===== 快捷操作 ===== */
.sidebar-shortcuts {
    padding: 0 12px;
    margin-top: 8px;
}

.shortcut-btn {
    width: 100%;
    padding: 10px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.shortcut-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.shortcut-btn .icon {
    font-size: 14px;
}