/**
 * EduManage - Components CSS
 * 组件样式文件 - 包含通用UI组件样式
 * 
 * 文件结构：
 * 1. Notification (通知组件)
 * 2. Modal (模态框组件)
 * 3. Pagination (分页组件)
 * 4. Navigation (导航栏组件)
 * 5. Footer (页脚组件)
 * 6. User Badge (用户类型徽章)
 */

/* ============================================
   1. Notification (通知组件)
   ============================================ */

/* 通知容器 */
#notification-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

/* 通知基础样式 */
.notification {
    pointer-events: auto;
    background-color: #ffffff;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-primary);
    min-width: 300px;
    max-width: 400px;
    transition: all var(--transition-normal);
}

/* 通知类型 */
.notification-success {
    border-left-color: var(--color-success);
}

.notification-error {
    border-left-color: var(--color-error);
}

.notification-warning {
    border-left-color: var(--color-warning);
}

.notification-info {
    border-left-color: var(--color-info);
}

/* 通知内容布局 */
.notification-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* 通知图标 */
.notification-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

.notification-success .notification-icon {
    background-color: #f6ffed;
    color: var(--color-success);
}

.notification-error .notification-icon {
    background-color: #fff2f0;
    color: var(--color-error);
}

.notification-warning .notification-icon {
    background-color: #fffbe6;
    color: var(--color-warning);
}

.notification-info .notification-icon {
    background-color: #e6f7ff;
    color: var(--color-info);
}

/* 通知文本 */
.notification-text {
    flex: 1;
    min-width: 0;
}

.notification-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.notification-message {
    font-size: 0.85rem;
    color: var(--color-secondary);
    line-height: 1.4;
}

/* 关闭按钮 */
.notification-close {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-secondary);
    transition: all var(--transition-fast);
    font-size: 16px;
}

.notification-close:hover {
    color: var(--color-primary);
}

/* 通知动画 */
.notification-enter-active,
.notification-leave-active {
    transition: all var(--transition-normal);
}

.notification-enter-from {
    opacity: 0;
    transform: translateX(30px);
}

.notification-leave-to {
    opacity: 0;
    transform: translateX(30px);
}

/* 通知响应式 */
@media (max-width: 768px) {
    #notification-container {
        left: var(--spacing-sm);
        right: var(--spacing-sm);
    }

    .notification {
        min-width: auto;
        max-width: none;
    }
}

/* ============================================
   2. Modal (模态框组件)
   ============================================ */

/* 模态框遮罩 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

/* 模态框容器 */
.modal-container {
    background-color: #ffffff;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    max-height: 90vh;
    overflow-y: auto;
    width: 90%;
    max-width: 600px;
}

/* 模态框尺寸类 */
.modal-container.modal-small {
    max-width: 400px;
}

.modal-container.modal-large {
    max-width: 800px;
}

.modal-container.modal-default {
    max-width: 600px;
}

.modal-container.modal-medium {
    max-width: 500px;
}

.modal-container.modal-xlarge {
    max-width: 1000px;
}

/* 模态框头部 */
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

/* 模态框标题 */
.modal-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* 模态框关闭按钮 */
.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--color-light);
    color: var(--color-primary);
}

/* 模态框内容区 */
.modal-body {
    padding: var(--spacing-lg);
}

/* 模态框内表单样式 */
.modal-body .form-group {
    margin-bottom: var(--spacing-md);
}

.modal-body .grid {
    gap: var(--spacing-md);
}

/* 模态框底部 */
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

/* 次要按钮 - 继承.btn基础样式 */
.btn-secondary {
    background-color: #6c757d;
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

/* ============================================
   3. Pagination (分页组件)
   ============================================ */

/* 分页容器 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

/* 分页信息 */
.page-info {
    font-size: 0.9rem;
    color: var(--color-secondary);
    margin-right: var(--spacing-md);
}

/* 分页列表 */
.pagination-list {
    display: flex;
    gap: var(--spacing-xs);
}

/* 分页项 - 使用padding替代固定宽高 */
.pagination-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--color-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.pagination-item:hover {
    background-color: var(--color-light);
    color: var(--color-primary);
}

/* 分页激活状态 */
.pagination-item.active {
    background-color: var(--color-primary);
    color: #ffffff;
}

/* 分页禁用状态 */
.pagination-item.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* ============================================
   4. Navigation (导航栏组件)
   ============================================ */

/* 导航栏基础 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* 导航内容 - 单行布局，左侧Logo和导航，右侧用户信息和菜单按钮 */
.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

/* 导航左侧区域 */
.navbar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* 导航右侧区域 */
.navbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* 移动端菜单按钮 */
.navbar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-primary);
}

/* Logo */
.navbar-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    flex-shrink: 0;
}

/* 导航链接容器 */
.navbar-links {
    display: flex;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

/* 导航链接 */
.navbar-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: var(--color-primary);
    font-size: 0.9rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    position: relative;
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1.4;
}

.navbar-link:hover {
    background-color: var(--color-light);
}

/* 导航激活状态 - 下划线 */
.navbar-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-primary);
}

/* 用户信息 */
.user-info {
    font-size: 0.9rem;
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

/* 登出按钮 */
.logout-button {
    display: inline-flex;
    align-items: center;
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: 0.9rem;
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-decoration: none;
    position: relative;
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1.4;
}

.logout-button:hover {
    background-color: var(--color-light);
}

/* 导航栏响应式 */
@media (max-width: 768px) {
    .navbar-links {
        display: none;
    }
    
    .navbar-toggle {
        display: block;
    }
    
    .user-info {
        display: none;
    }
}

@media (max-width: 480px) {
    .navbar-logo {
        font-size: 1.25rem;
    }
}

/* ============================================
   5. Footer (页脚组件)
   ============================================ */

/* 页脚基础 - 与navbar保持一致的底色和边线 */
.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    background-color: #fafafa;
    margin-top: auto;
}

/* 页脚内容 - 网格布局 */
.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

/* 页脚列 */
.footer-column h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}

/* 页脚链接 - 统一样式（覆盖全局a标签） */
.footer a {
    color: var(--color-secondary);
    font-size: 0.8rem;
    position: relative;
}

.footer a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition-normal);
}

.footer a:hover {
    color: var(--color-primary);
}

.footer a:hover::after {
    width: 100%;
}

/* 页脚底部 */
.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

/* 页脚底部链接容器 */
.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* 页脚响应式 */
@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: var(--spacing-md);
    }
}

/* ============================================
   7. Sidebar (侧边栏组件) - 答题页面和提交预览页共用
   ============================================ */

/* 侧边栏切换按钮 */
.sidebar-toggle {
    position: fixed;
    top: 60px;
    right: 20px;
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) calc(var(--spacing-sm) + 6px);
    border-radius: var(--radius-sm);
    cursor: pointer;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: all var(--transition-normal);
}

.sidebar-toggle.hidden {
    opacity: 0;
    transform: translateX(100%);
    pointer-events: none;
}

/* 侧边栏容器 */
.sidebar {
    position: fixed;
    top: 60px;
    right: 20px;
    width: 280px;
    max-height: 80vh;
    background-color: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    overflow-y: auto;
    z-index: 99;
    transition: all var(--transition-normal);
}

.sidebar.collapsed {
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
}

/* 侧边栏头部 */
.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
}

.sidebar-close {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--color-secondary);
    line-height: 1;
}

/* 题目分类区 */
.question-section {
    margin-bottom: var(--spacing-lg);
}

.section-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 题目数字容器 */
.question-numbers {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* 题目数字方块 */
.question-number-box {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid #ddd;
}

/* 题目状态 - 正确 */
.question-number-box.correct {
    background-color: #e8f5e9;
    color: #388e3c;
    border-color: #c8e6c9;
}

/* 题目状态 - 错误 */
.question-number-box.wrong {
    background-color: #ffebee;
    color: #d32f2f;
    border-color: #ffcdd2;
}

/* 题目状态 - 未作答 */
.question-number-box.unanswered {
    background-color: #f5f5f5;
    color: var(--color-secondary);
    border-color: #ddd;
}

/* 题目状态 - 已作答（问答题） */
.question-number-box.answered {
    background-color: #e8f5e9;
    color: #388e3c;
    border-color: #c8e6c9;
}

.question-number-box:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* 图例 */
.legend {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-around;
}

.legend-item {
    display: flex;
    align-items: center;
}

.legend-color {
    width: 18px;
    height: 18px;
    border-radius: var(--radius-sm);
    margin-right: 6px;
    border: 1px solid #ddd;
}

.legend-color.correct {
    background-color: #e8f5e9;
    border-color: #c8e6c9;
}

.legend-color.wrong {
    background-color: #ffebee;
    border-color: #ffcdd2;
}

.legend-color.unanswered {
    background-color: #f5f5f5;
    border-color: #ddd;
}

.legend-color.answered {
    background-color: #e8f5e9;
    border-color: #c8e6c9;
}

.legend-text {
    font-size: 0.8rem;
    color: var(--color-secondary);
}

/* 侧边栏响应式 */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
    }
    .sidebar:not(.collapsed) {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 250px;
    }
}

/* ============================================
   6. User Badge (用户类型徽章)
   ============================================ */

/* 徽章基础 */
.user-type-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

/* 学生徽章 */
.user-type-badge.type-1 {
    background-color: #e6f7ff;
    color: var(--color-info);
}

/* 老师徽章 */
.user-type-badge.type-2 {
    background-color: #f6ffed;
    color: var(--color-success);
}

/* 管理员徽章 */
.user-type-badge.type-3 {
    background-color: #fff2e8;
    color: var(--color-warning);
}

/* 面包屑导航 */
.breadcrumb {
    background-color: #f8f9fa;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
}

.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: 10px;
    margin: 0;
    padding: 0;
}

.breadcrumb-item {
    position: relative;
}

.breadcrumb-item:not(:last-child)::after {
    content: '>';
    margin-left: 10px;
    color: var(--color-secondary);
}

.breadcrumb-link {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-family: var(--font-family-primary);
    transition: color 0.3s ease;
}

.breadcrumb-link:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.breadcrumb-current {
    color: var(--color-secondary);
    font-size: 0.85rem;
    font-family: var(--font-family-primary);
}

@media (max-width: 768px) {
    .breadcrumb-list {
        flex-wrap: wrap;
        gap: 5px;
    }

    .breadcrumb-item:not(:last-child)::after {
        margin-left: 5px;
    }

    .breadcrumb-link,
    .breadcrumb-current {
        font-size: 0.8rem;
    }
}

/* 试卷预览组件 */
.testpaper-preview {
    max-height: 70vh;
    overflow-y: auto;
    padding: 20px;
}

.testpaper-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.testpaper-header h3 {
    margin: 0 0 15px 0;
    color: var(--primary-color);
}

.testpaper-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.meta-item {
    display: flex;
    align-items: center;
    font-size: 14px;
}

.meta-label {
    font-weight: 500;
    margin-right: 5px;
}

.testpaper-description {
    margin-bottom: 25px;
    padding: 15px;
    background-color: #f9f9f9;
    border-radius: 4px;
}

.testpaper-description h4 {
    margin: 0 0 10px 0;
    font-size: 16px;
}

.testpaper-questions {
    margin-top: 20px;
}

.testpaper-questions h4 {
    margin: 0 0 15px 0;
    font-size: 16px;
}

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px;
    color: #666;
}

.questions-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.question-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
    font-weight: 500;
    gap: var(--spacing-sm);
}

.question-number {
    font-weight: 600;
}

.question-type {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
}

.question-type.choice {
    background-color: #e3f2fd;
    color: #1976d2;
}

.question-type.truefalse {
    background-color: #e8f5e9;
    color: #388e3c;
}

.question-type.essay {
    background-color: #fff3e0;
    color: #f57c00;
}

.question-score {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.question-item {
    padding: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    background-color: #fff;
    overflow-x: auto;
}

.question-content {
    margin-bottom: 15px;
    line-height: 1.6;
}

.question-options {
    margin-bottom: 15px;
}

.option-item {
    display: flex;
    margin-bottom: 8px;
    line-height: 1.5;
}

.option-label {
    width: 20px;
    font-weight: 500;
    margin-right: 10px;
}

.option-content {
    flex: 1;
}

.question-answer {
    padding-top: 10px;
    border-top: 1px dashed #e0e0e0;
    font-size: 14px;
}

.answer-label {
    font-weight: 500;
    margin-right: 5px;
}

.answer-content {
    font-style: italic;
}

/* 学生答题预览组件 */
.student-answer-preview {
    overflow-y: auto;
    padding: 20px;
}

.student-answer-questions {
    margin-top: 20px;
}

.student-answer-questions h4 {
    margin: 0 0 15px 0;
    font-size: 16px;
}

.option-item {
    padding: 10px 12px;
    border-radius: 6px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    cursor: pointer;
}

.option-item:hover {
    border-color: #d1d5db;
    background-color: #f9fafb;
}

.option-item.selected {
    background-color: #f0f7ff;
    border-color: #93c5fd;
}

.option-item.correct {
    background-color: #e8f5e9;
    border-color: #388e3c;
}

.option-item.incorrect {
    background-color: #ffebee;
    border-color: #c62828;
}

.student-answer {
    padding: 10px;
    background-color: #f9f9f9;
    border-radius: 4px;
    margin-bottom: 10px;
    font-size: 14px;
}

.correct-answer {
    padding: 10px;
    background-color: #f0f8f0;
    border-radius: 4px;
    margin-bottom: 10px;
    font-size: 14px;
}

.question-result {
    padding: 10px;
    background-color: #f0f0f8;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
}

.result-label {
    font-weight: 500;
    margin-right: 5px;
}

.result-score {
    font-weight: 600;
    color: var(--primary-color);
}

.answer-status {
    margin-left: 10px;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 500;
}

.answer-status.correct {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.answer-status.partial {
    background-color: #fff3e0;
    color: #ef6c00;
}

.answer-status.incorrect {
    background-color: #ffebee;
    color: #c62828;
}

/* 预览组件响应式 */
@media (max-width: 768px) {
    .testpaper-meta {
        flex-direction: column;
        gap: 8px;
    }

    .meta-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .meta-label {
        margin-bottom: 2px;
    }
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background-color: #555;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top:hover {
    background-color: #333;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.back-to-top-icon {
    font-size: 20px;
    font-weight: bold;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 38px;
        height: 38px;
    }

    .back-to-top-icon {
        font-size: 16px;
    }
}

/* ============================================
   8. Offcanvas (移动端抽屉菜单)
   ============================================ */

/* Offcanvas 遮罩 */
.offcanvas-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.offcanvas-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Offcanvas 容器 - 从右侧滑出 */
.offcanvas {
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100vh;
    background-color: #ffffff;
    box-shadow: var(--shadow-lg);
    z-index: 201;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal);
}

.offcanvas.active {
    transform: translateX(-280px);
}

/* Offcanvas 头部 */
.offcanvas-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.offcanvas-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
}

.offcanvas-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-secondary);
    line-height: 1;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.offcanvas-close:hover {
    background-color: var(--color-light);
    color: var(--color-primary);
}

/* Offcanvas 内容 */
.offcanvas-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

/* Offcanvas 链接 */
.offcanvas-link {
    display: block;
    padding: var(--spacing-md);
    color: var(--color-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
    transition: background-color var(--transition-fast);
    font-size: 0.9rem;
}

.offcanvas-link:hover {
    background-color: var(--color-light);
}

.offcanvas-link.active {
    background-color: var(--color-light);
}

/* Offcanvas 分隔线 */
.offcanvas-divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-lg) 0;
}

/* Offcanvas 用户信息 */
.offcanvas-user {
    padding: var(--spacing-md);
}

.offcanvas-user-name {
    display: block;
    font-size: 0.9rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.offcanvas-logout-form {
    margin: 0;
}

.offcanvas-logout {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    text-align: left;
    transition: background-color var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

.offcanvas-logout:hover {
    background-color: var(--color-light);
}