/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 亮色主题变量 */
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --gray-color: #95a5a6;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --sidebar-bg: #f8f9fa;
    --hover-color: #f5f5f5;
    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    /* 暗色主题变量 */
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --dark-color: #1a1a2e;
    --light-color: #2d3748;
    --gray-color: #718096;
    --border-color: #4a5568;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --bg-color: #1a202c;
    --card-bg: #2d3748;
    --text-color: #e2e8f0;
    --text-secondary: #a0aec0;
    --sidebar-bg: #2d3748;
    --hover-color: #4a5568;
}

body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    min-height: 100vh;
}

/* 等宽字体用于代码相关元素 */
code, pre, .monospace {
    font-family: 'Roboto Mono', 'Courier New', monospace;
}

/* 容器布局 */
.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100%;
    overflow-x: hidden;
}

/* 顶部导航栏 */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

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

/* 主内容区域 */
.main-content {
    display: flex;
    flex: 1;
    min-height: calc(100vh - 80px);
}

/* 侧边栏 */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

/* 分类列表 */
.categories-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-speed);
    position: relative;
}

.category-item:hover {
    background-color: var(--hover-color);
}

.category-item.active {
    background-color: var(--primary-color);
    color: white;
}

.category-item i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.category-item span {
    flex: 1;
}

.count-badge {
    background-color: var(--gray-color);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.category-item.active .count-badge {
    background-color: white;
    color: var(--primary-color);
}

/* 标签区域 */
.tags-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background-color: var(--light-color);
    color: var(--text-color);
    padding: 0.4rem 0.8rem;
    border-radius: 16px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}

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

.tag.active {
    background-color: var(--primary-color);
    color: white;
}

/* 统计区域 */
.stats-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.stats {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.stat-value {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
}

/* 主要内容区域 */
.content-area {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* 工具栏 */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    max-width: 500px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 1rem;
    color: var(--gray-color);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
    transition: all var(--transition-speed);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

#clearSearch {
    position: absolute;
    right: 0.5rem;
    background: none;
    border: none;
    color: var(--gray-color);
    cursor: pointer;
}

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

/* 按钮样式 */
.btn-primary, .btn-secondary, .btn-danger, .btn-icon {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-speed);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

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

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
    background-color: var(--light-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: var(--gray-color);
    color: white;
}

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

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-icon {
    background: none;
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 50%;
    width: 40px;
    height: 40px;
}

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

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

/* 网址容器 */
.urls-container {
    flex: 1;
    display: grid;
    gap: 1.5rem;
    position: relative;
}

.urls-container.grid-view {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.urls-container.list-view {
    grid-template-columns: 1fr;
}

/* 网址卡片 */
.url-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.url-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-color);
    border-color: var(--primary-color);
}

.url-card.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.url-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.url-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 0.75rem;
}

.url-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    flex: 1;
}

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

.url-actions button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
}

.url-actions button:hover {
    color: var(--primary-color);
    background-color: var(--hover-color);
}

.url-address {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    word-break: break-all;
    font-family: 'Roboto Mono', monospace;
}

.url-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.url-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.url-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.url-tag {
    background-color: var(--light-color);
    color: var(--text-color);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
}

.url-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.favorite-btn {
    color: var(--warning-color);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
}

.favorite-btn.active {
    color: #f1c40f;
}

/* 空状态 */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state i {
    margin-bottom: 1.5rem;
    color: var(--gray-color);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.empty-state p {
    margin-bottom: 2rem;
}

/* 批量操作面板 */
.bulk-actions-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 1rem 2rem;
    transform: translateY(100%);
    transition: transform var(--transition-speed);
    box-shadow: 0 -4px 20px var(--shadow-color);
    z-index: 1000;
}

.bulk-actions-panel.active {
    transform: translateY(0);
}

.bulk-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bulk-buttons {
    display: flex;
    gap: 1rem;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 12px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px var(--shadow-color);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
}

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

.modal-body {
    padding: 2rem;
}

.modal-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    transition: all var(--transition-speed);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

.tags-input-container {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    background-color: var(--bg-color);
}

.tags-display {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.tag-input-tag {
    background-color: var(--primary-color);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 16px;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.tag-input-tag button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0;
    font-size: 0.9rem;
}

#tagsInput {
    border: none;
    padding: 0;
    background: none;
    width: 100%;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin: 0;
}

/* 导入/导出标签页 */
.import-export-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 8px 8px 0 0;
    font-weight: 500;
    transition: all var(--transition-speed);
}

.tab-btn:hover {
    color: var(--text-color);
    background-color: var(--hover-color);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.tab-content {
    display: none;
}

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

.data-preview {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    max-height: 200px;
    overflow-y: auto;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
}

.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    margin: 1.5rem 0;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background-color: var(--hover-color);
}

.file-upload-area i {
    color: var(--gray-color);
    margin-bottom: 1rem;
}

.import-warning {
    background-color: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--danger-color);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.import-warning i {
    color: var(--danger-color);
    font-size: 1.2rem;
}

.import-warning p {
    color: var(--text-color);
    margin: 0;
}

/* 快捷键提示 */
.shortcuts-hint {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    box-shadow: 0 4px 12px var(--shadow-color);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        max-height: 300px;
        overflow-y: auto;
    }
    
    .categories-list {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .category-item {
        flex: 1;
        min-width: 150px;
    }
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .header-controls {
        width: 100%;
        justify-content: center;
    }
    
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        max-width: 100%;
    }
    
    .view-controls {
        justify-content: center;
    }
    
    .urls-container.grid-view {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .modal-content {
        margin: 1rem;
        max-height: 80vh;
    }
    
    .shortcuts-hint {
        display: none;
    }
}

@media (max-width: 480px) {
    .urls-container.grid-view {
        grid-template-columns: 1fr;
    }
    
    .url-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .url-actions {
        align-self: flex-end;
    }
    
    .url-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .url-meta {
        width: 100%;
        justify-content: space-between;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.url-card {
    animation: fadeIn 0.3s ease;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--sidebar-bg);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* 选择框样式 */
.url-card input[type="checkbox"] {
    position: absolute;
    top: 1rem;
    left: 1rem;
    width: 20px;
    height: 20px;
    cursor: pointer;
    z-index: 10;
    opacity: 0;
}

.url-card.selected input[type="checkbox"] {
    opacity: 1;
}

.url-card::before {
    content: '';
    position: absolute;
    top: 1rem;
    left: 1rem;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
    transition: all var(--transition-speed);
    z-index: 1;
}

.url-card.selected::before {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.url-card.selected::after {
    content: '✓';
    position: absolute;
    top: 1rem;
    left: 1rem;
    width: 20px;
    height: 20px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    z-index: 2;
}