/* ============================================
   布局样式
   ============================================ */

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* 顶部导航栏 */
.topbar {
    height: var(--topbar-height);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-bottom: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    z-index: 1000;
    position: relative;
    overflow: visible; /* 確保下拉選單不被裁切，可懸停點擊 */
}

.topbar-left {
    color: white;
}

.topbar-left .logo {
    color: white;
}

.topbar-left .logo-text {
    color: white;
    font-weight: 600;
    font-size: 18px;
}

.topbar-left .global-search input {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    backdrop-filter: blur(10px);
}

.topbar-left .global-search input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.topbar-left .global-search input:focus {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.topbar-left .global-search i {
    color: rgba(255, 255, 255, 0.9);
}

.topbar-right .action-btn {
    color: rgba(255, 255, 255, 0.9);
}

.topbar-right .action-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.topbar-right .user-info {
    color: white;
}

.topbar-right .user-name,
.topbar-right .user-role {
    color: white;
}

/* (user-menu-btn 已移除) */

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex: 1;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

.logo i {
    font-size: 24px;
}

.global-search {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.global-search i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.global-search input {
    width: 100%;
    height: 36px;
    padding: 0 12px 0 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: var(--transition-base);
}

.global-search input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.1);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.quick-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.action-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-base);
    position: relative;
}

.action-btn:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.notification-btn .badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--danger-color);
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 16px;
    text-align: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
}

.user-info:hover {
    background: var(--bg-color);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
}

.user-details {
    display: flex;
    flex-direction: column;
}

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

.user-role {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 用戶下拉選單：固定定位在頂欄右上角下方，不嵌套在 user-info 內 */
.user-dropdown {
    position: fixed;
    top: var(--topbar-height);
    right: 16px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    min-width: 170px;
    display: none;
    z-index: 99999;
    padding: 4px 0;
}

.user-dropdown.user-dropdown-open {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-base);
    cursor: pointer;
    font-size: 14px;
    white-space: nowrap;
}

.dropdown-item:hover {
    background: var(--primary-light, #dbeafe);
    color: var(--primary-color);
}

.dropdown-item i {
    width: 16px;
    text-align: center;
    color: var(--text-secondary);
}

.dropdown-item:hover i {
    color: var(--primary-color);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-xs) 0;
}

/* 个人中心區塊 */
.profile-section {
    margin-bottom: 24px;
}
.profile-section:last-child {
    margin-bottom: 0;
}
.profile-section-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
}

/* 主内容区（z-index 低於 topbar，避免遮住頂部下拉選單） */
.main-wrapper {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

/* 左侧导航菜单 */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    border-right: none;
    overflow-y: auto;
    overflow-x: hidden;
    transition: var(--transition-base);
    z-index: 999;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
}

.sidebar-nav {
    padding: var(--spacing-md) 0;
}

.nav-group-title {
    color: rgba(255, 255, 255, 0.5);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 11px;
}

/* 已移动到 .sidebar .nav-item 定义中 */

/* 已移动到 .sidebar .nav-submenu 定义中 */

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

/* 侧边栏导航项样式 - 深色背景使用白色文字 */
.sidebar .nav-group {
    margin-bottom: var(--spacing-md);
}

.sidebar .nav-group-title {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar .nav-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-base);
    position: relative;
    cursor: pointer;
    border-left: 3px solid transparent;
    margin: 2px var(--spacing-sm);
    border-radius: var(--radius-md);
}

.sidebar .nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-left-color: transparent;
}

.sidebar .nav-item.active {
    background: rgba(59, 130, 246, 0.2);
    color: white;
    border-left-color: #3b82f6;
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.2);
}

.sidebar .nav-item i {
    width: 20px;
    margin-right: var(--spacing-sm);
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
}

.sidebar .nav-item.active i {
    color: white;
}

.sidebar .nav-item-text {
    flex: 1;
}

.sidebar .nav-item-arrow {
    font-size: 12px;
    transition: var(--transition-base);
    color: rgba(255, 255, 255, 0.6);
}

.sidebar .nav-item.expanded .nav-item-arrow,
.sidebar .nav-group.expanded .nav-item-arrow {
    transform: rotate(90deg);
    color: rgba(255, 255, 255, 0.8);
}

.sidebar .nav-submenu {
    overflow: hidden;
    max-height: 0;
    background: rgba(0, 0, 0, 0.2);
    margin: var(--spacing-xs) 0;
    border-radius: var(--radius-md);
    transition: max-height 0.25s ease;
}

/* 展開時顯示：與 app.js 中對 .nav-group 添加 expanded 一致 */
.sidebar .nav-group.expanded .nav-submenu {
    max-height: 500px;
}

.sidebar .nav-submenu .nav-item {
    padding-left: calc(var(--spacing-lg) + 20px + var(--spacing-sm));
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

.sidebar .nav-submenu .nav-item:hover {
    color: white;
}

/* 内容展示区 */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
}

/* 面包屑导航 */
.breadcrumb-container {
    height: var(--breadcrumb-height);
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.breadcrumb-item {
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.breadcrumb-item:hover {
    color: var(--primary-color);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition-base);
}

.breadcrumb-item:hover {
    color: var(--primary-color);
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    margin-left: var(--spacing-sm);
    color: var(--text-disabled);
}

.breadcrumb-item.active {
    color: var(--text-primary);
}

/* 标签页管理 */
.tabs-container {
    height: var(--tabs-height);
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    overflow-x: auto;
}

.tabs-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 1;
}

.tabs {
    display: flex;
    gap: var(--spacing-xs);
    flex: 1;
    overflow-x: auto;
}

.tab-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
    font-size: 13px;
}

.tab-item:hover {
    background: #e6f7ff;
    border-color: var(--primary-color);
}

.tab-item.active {
    background: var(--bg-white);
    border-bottom-color: var(--bg-white);
    color: var(--primary-color);
    font-weight: 500;
}

.tab-close {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.tab-close:hover {
    background: var(--danger-color);
    color: white;
}

.tabs-close-all {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.tabs-close-all:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

/* 页面容器 */
.page-container {
    flex: 1;
    overflow: auto;
    padding: var(--spacing-lg);
}

.page-content {
    max-width: 1400px;
    margin: 0 auto;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* 底部信息栏 */
.footer {
    height: var(--footer-height);
    background: var(--bg-white);
    border-top: 1px solid var(--border-color);
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
}

.footer-divider {
    margin: 0 var(--spacing-sm);
    color: var(--border-color);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: var(--topbar-height);
        height: calc(100vh - var(--topbar-height));
        transform: translateX(-100%);
        z-index: 998;
    }

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

    .menu-toggle {
        display: block;
    }

    .content-area {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .global-search {
        display: none;
    }

    .user-details {
        display: none;
    }

    .breadcrumb-container,
    .tabs-container {
        padding: 0 var(--spacing-md);
    }
}