* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f8fafc;
    color: #334155;
    line-height: 1.6;
}

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

/* 侧边栏样式 */
.sidebar {
    width: 250px;
    background: linear-gradient(180deg, #1e293b 0%, #334155 100%);
    color: white;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid #475569;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.logo i {
    font-size: 1.5rem;
    color: #3b82f6;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin: 0.25rem 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: #cbd5e0;
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background-color: #4a5568;
    color: white;
    border-left-color: #4299e1;
}

.nav-item.active .nav-link {
    background-color: #4299e1;
    color: white;
    border-left-color: #3182ce;
}

.nav-link i {
    width: 1.25rem;
    text-align: center;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid #4a5568;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 2.5rem;
    height: 2.5rem;
    background-color: #4299e1;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.user-name {
    font-weight: 500;
    font-size: 0.875rem;
}

.user-role {
    font-size: 0.75rem;
    color: #a0aec0;
}

/* 主内容区域 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.top-header {
    background: white;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: #4a5568;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s;
}

.sidebar-toggle:hover {
    background-color: #f7fafc;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 0.75rem;
    color: #a0aec0;
}

.search-box input {
    padding: 0.5rem 0.75rem 0.5rem 2.5rem;
    border: 1px solid #e2e8f0;
    border-radius: 0.375rem;
    background: #f7fafc;
    width: 250px;
    transition: all 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: #4299e1;
    background: white;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
}

.notification-btn {
    position: relative;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: #4a5568;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s;
}

.notification-btn:hover {
    background-color: #f7fafc;
}

.notification-badge {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    background: #e53e3e;
    color: white;
    font-size: 0.75rem;
    padding: 0.125rem 0.375rem;
    border-radius: 0.75rem;
    min-width: 1.25rem;
    text-align: center;
}

/* 内容区域 */
.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    margin-bottom: 2rem;
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.stat-icon {
    width: 3rem;
    height: 3rem;
    background: #4299e1;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.stat-icon.used {
    background: #48bb78;
}

.stat-icon.unused {
    background: #ed8936;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.875rem;
    font-weight: 700;
    color: #2d3748;
}

.stat-label {
    font-size: 0.875rem;
    color: #718096;
}

.page-content {
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.content-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.content-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2d3748;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.filter-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.filter-select {
    padding: 0.5rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    background: white;
    color: #374151;
    font-size: 0.875rem;
    min-width: 120px;
}

.search-input {
    padding: 0.5rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    background: white;
    color: #374151;
    font-size: 0.875rem;
    min-width: 200px;
}

.search-input:focus,
.filter-select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.action-buttons {
    display: flex;
    gap: 0.75rem;
}

/* 按钮样式 */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background: #4299e1;
    color: white;
}

.btn-primary:hover {
    background: #3182ce;
}

.btn-secondary {
    background: #718096;
    color: white;
}

.btn-secondary:hover {
    background: #4a5568;
}

.btn-outline {
    background: transparent;
    color: #4299e1;
    border: 1px solid #4299e1;
}

.btn-outline:hover {
    background: #4299e1;
    color: white;
}

.btn-danger {
    background: #e53e3e;
    color: white;
}

.btn-danger:hover {
    background: #c53030;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 表格样式 */
.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.data-table th {
    background: #f7fafc;
    font-weight: 600;
    color: #4a5568;
    font-size: 0.875rem;
}

.data-table tr:hover {
    background: #f7fafc;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-used {
    background: #c6f6d5;
    color: #22543d;
}

.status-unused {
    background: #fed7aa;
    color: #9c4221;
}

.table-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f7fafc;
}

.batch-actions {
    display: flex;
    gap: 0.5rem;
}

.pagination-info {
    font-size: 0.875rem;
    color: #718096;
}

.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-top: 1px solid #e2e8f0;
    background: #f8fafc;
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-numbers {
    display: flex;
    gap: 0.25rem;
}

.page-btn {
    padding: 0.375rem 0.75rem;
    border: 1px solid #d1d5db;
    background: white;
    color: #374151;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
    min-width: 2.5rem;
    text-align: center;
}

.page-btn:hover:not(:disabled) {
    background: #f3f4f6;
    border-color: #9ca3af;
}

.page-btn.active {
    background: #3b82f6;
    color: white;
    border-color: #3b82f6;
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 0.5rem;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2d3748;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #a0aec0;
    cursor: pointer;
    padding: 0.25rem;
}

.modal-close:hover {
    color: #4a5568;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #4a5568;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: fixed;
        top: 0;
        left: -100%;
        z-index: 999;
        transition: left 0.3s ease;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .main-content {
        width: 100%;
    }
    
    .stats-cards {
        grid-template-columns: 1fr;
    }
    
    .content-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .table-footer {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .search-box input {
        width: 200px;
    }

    .toast {
        right: 10px;
        left: 10px;
        min-width: auto;
        transform: translateY(-100%);
    }

    .toast.show {
        transform: translateY(0);
    }
}

/* Toast 提示样式 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    z-index: 10000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    min-width: 300px;
    border-left: 4px solid #3b82f6;
}

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

.toast-success {
    border-left-color: #10b981;
}

.toast-error {
    border-left-color: #ef4444;
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
}

.toast-success .toast-content i {
    color: #10b981;
}

.toast-error .toast-content i {
    color: #ef4444;
}

.toast-content i {
    font-size: 1.25rem;
    color: #3b82f6;
}

.toast-content span {
    color: #374151;
    font-weight: 500;
}

/* 添加页面标签页样式 */
.add-mode-tabs {
    display: flex;
    gap: 0.5rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #d1d5db;
    background: white;
    color: #6b7280;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.tab-btn:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

.tab-btn.active {
    background: #3b82f6;
    color: white;
    border-color: #3b82f6;
}

/* 批量上传样式 */
.batch-upload-area {
    max-width: 800px;
}

.batch-info {
    background: #f0f9ff;
    border: 1px solid #0ea5e9;
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 1rem 0;
}

.batch-info p {
    margin: 0 0 0.5rem 0;
    color: #0c4a6e;
    font-weight: 500;
}

.batch-info ul {
    margin: 0;
    padding-left: 1.5rem;
    color: #075985;
}

.batch-info li {
    margin-bottom: 0.25rem;
}

.batch-info code {
    background: #e0f2fe;
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
}

/* 上传方式标签页 */
.upload-method-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.method-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    background: white;
    color: #6b7280;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.method-btn:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

.method-btn.active {
    background: #3b82f6;
    color: white;
    border-color: #3b82f6;
}

/* 文件上传区域 */
.file-upload-area {
    margin-top: 0.5rem;
}

.file-drop-zone {
    border: 2px dashed #d1d5db;
    border-radius: 0.75rem;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: #fafbfc;
}

.file-drop-zone:hover {
    border-color: #3b82f6;
    background: #f0f9ff;
}

.file-drop-zone.dragover {
    border-color: #3b82f6;
    background: #eff6ff;
    transform: scale(1.02);
}

.file-drop-content i {
    font-size: 3rem;
    color: #9ca3af;
    margin-bottom: 1rem;
}

.file-drop-content p {
    font-size: 1.1rem;
    color: #374151;
    margin-bottom: 0.5rem;
}

.file-drop-content small {
    color: #6b7280;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: #f0f9ff;
    border: 1px solid #3b82f6;
    border-radius: 0.5rem;
    margin-top: 1rem;
}

.file-info i {
    color: #3b82f6;
    font-size: 1.25rem;
}

.file-info span {
    flex: 1;
    color: #1e40af;
    font-weight: 500;
}

.btn-remove {
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 0.375rem;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-remove:hover {
    background: #dc2626;
}

/* 邮箱地址点击样式 */
.email-address-clickable {
    transition: all 0.2s ease;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    display: inline-block;
}

.email-address-clickable:hover {
    background-color: #eff6ff;
    color: #1d4ed8 !important;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.1);
}

.email-address-clickable:active {
    transform: translateY(0);
    background-color: #dbeafe;
}