/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #48bb78;
    --danger-color: #f56565;
    --warning-color: #ed8936;
    --bg-color: #f7fafc;
    --card-bg: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* 登录容器 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo {
    font-size: 64px;
    margin-bottom: 20px;
}

.login-header h2 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.login-footer p {
    color: var(--text-secondary);
    font-size: 13px;
}

.hint {
    color: var(--text-secondary);
    font-size: 12px;
    margin-top: 5px;
}

/* 容器布局 */
.admin-container {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 180px;
    background: linear-gradient(180deg, #1a202c 0%, #2d3748 100%);
    color: white;
    padding: 15px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
    padding: 0 10px;
}

.logo-icon {
    font-size: 36px;
}

.logo h2 {
    font-size: 24px;
    font-weight: 600;
}

.nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 15px;
    text-align: left;
}

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

.nav-item.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.nav-item .icon {
    font-size: 20px;
}

.sidebar-footer {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.back-link {
    display: block;
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: 10px;
    transition: var(--transition);
}

.back-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 180px;
    padding: 30px;
    overflow-y: auto;
}

/* 头部 */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    gap: 12px;
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

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

.btn-edit {
    background: var(--warning-color);
    color: white;
    padding: 6px 12px;
    font-size: 12px;
}

.btn-edit:hover {
    background: #c05621;
}

.btn-delete {
    background: var(--danger-color);
    color: white;
    padding: 6px 12px;
    font-size: 12px;
}

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

/* 内容区域 */
.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

/* 筛选器 */
.filter-bar {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.filter-select,
.filter-input {
    padding: 10px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
    flex: 1;
}

.filter-select:focus,
.filter-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 表格样式 */
.table-container {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

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

.data-table thead {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.data-table th,
.data-table td {
    padding: 16px;
    text-align: left;
}

.data-table th {
    font-weight: 600;
    font-size: 14px;
}

.data-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background: var(--bg-color);
}

.data-table tbody tr:last-child {
    border-bottom: none;
}

.data-table .link-icon {
    font-size: 24px;
    width: 32px;
    text-align: center;
}

.data-table .link-title {
    font-weight: 600;
    color: var(--text-primary);
}

.data-table .link-url {
    color: var(--text-secondary);
    font-size: 13px;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.data-table .actions {
    display: flex;
    gap: 8px;
}

/* 分类网格 */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.category-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

.category-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.category-icon {
    font-size: 36px;
}

.category-name {
    font-size: 20px;
    font-weight: 600;
}

.category-stats {
    color: var(--text-secondary);
    font-size: 14px;
}

.category-actions {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    gap: 8px;
}

/* 设置面板 */
.settings-panel {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow-sm);
    max-width: 600px;
}

.setting-item {
    margin-bottom: 25px;
}

.setting-item label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.setting-item input,
.setting-item select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
}

.setting-item input:focus,
.setting-item select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.color-picker {
    display: flex;
    gap: 12px;
}

.color-btn {
    width: 48px;
    height: 48px;
    border: 3px solid transparent;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.color-btn:hover {
    transform: scale(1.1);
}

.color-btn.active {
    border-color: var(--text-primary);
}

.color-btn.active::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: bold;
    text-shadow: 0 0 2px rgba(0,0,0,0.5);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 16px;
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h3 {
    font-size: 22px;
    font-weight: 600;
}

.close-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-color);
    border-radius: 50%;
    cursor: pointer;
    font-size: 24px;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.modal-body {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
    }
    
    .main-content {
        margin-left: 220px;
        padding: 20px;
    }
    
    .data-table .link-url {
        max-width: 150px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 70px;
        padding: 15px 10px;
    }
    
    .logo h2,
    .nav-item span:not(.icon),
    .back-link span {
        display: none;
    }
    
    .main-content {
        margin-left: 70px;
        padding: 15px;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .header-actions {
        flex-wrap: wrap;
        width: 100%;
    }
    
    .btn {
        flex: 1;
        justify-content: center;
    }
    
    .filter-bar {
        flex-direction: column;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .data-table {
        min-width: 600px;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .sidebar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
        padding: 10px;
    }
    
    .header h1 {
        font-size: 24px;
    }
    
    .header-actions {
        flex-direction: column;
    }
    
    .modal-content {
        margin: 10px;
    }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.empty-state p {
    font-size: 14px;
}

/* 退出登录按钮 */
.logout-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    margin-top: 10px;
}

.logout-btn:hover {
    background: var(--danger-color);
    color: white;
}

/* 重新配置按钮 */
.reconfig-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    margin-top: 10px;
}

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

/* 切换开关 */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-switch input[type="checkbox"] {
    display: none;
}

.toggle-switch label {
    width: 52px;
    height: 28px;
    background: #cbd5e0;
    border-radius: 14px;
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.toggle-switch label::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch input:checked + label {
    background: linear-gradient(135deg, var(--success-color) 0%, #38a169 100%);
    box-shadow: 0 0 0 4px rgba(72, 187, 120, 0.2);
}

.toggle-switch input:checked + label::after {
    transform: translateX(24px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.toggle-switch label:hover {
    background: #a0aec0;
}

.toggle-switch input:checked + label:hover {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
}

.toggle-switch label:active {
    transform: scale(0.98);
}

.btn-block {
    width: 100%;
    padding: 14px 24px;
}

/* 搜索引擎网格 */
.search-engines-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.search-engine-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
}

.search-engine-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.search-engine-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.search-engine-icon {
    font-size: 32px;
}

.search-engine-name {
    font-size: 18px;
    font-weight: 600;
}

.search-engine-url {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 8px;
    word-break: break-all;
}

.search-engine-placeholder {
    color: var(--text-secondary);
    font-size: 12px;
}

.search-engine-actions {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    gap: 8px;
}

/* 输入框带操作按钮 */
.input-with-action {
    display: flex;
    gap: 8px;
    align-items: stretch;
}

.input-with-action input {
    flex: 1;
}

.btn-icon {
    width: 44px;
    height: 44px;
    border: 2px solid var(--border-color);
    background: var(--bg-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: rotate(180deg);
}

.btn-icon:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-icon.loading {
    animation: spin 1s linear infinite;
}

/* 图标输入组 */
.icon-input-group {
    display: flex;
    gap: 10px;
}

.icon-input-group input {
    flex: 1;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.icon-tabs {
    display: flex;
    gap: 5px;
    margin-top: 10px;
    margin-bottom: 10px;
}

.icon-tab {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    transition: var(--transition);
}

.icon-tab:hover {
    background: var(--bg-color);
}

.icon-tab.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    gap: 8px;
    max-height: 400px;
    overflow-y: auto;
    padding: 10px;
}

.emoji-item {
    font-size: 32px;
    padding: 10px;
    text-align: center;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
}

.emoji-item:hover {
    background: var(--bg-color);
    transform: scale(1.2);
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}