/* ============================================
   知识依赖整理器 - 样式表
   ============================================ */

/* CSS 变量 */
:root {
    /* 主色调 */
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --primary-bg: #eff6ff;
    
    /* 辅助色 */
    --success: #22c55e;
    --success-bg: #f0fdf4;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    
    /* 中性色 */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 节点类型颜色 */
    --goal-color: #3b82f6;
    --goal-bg: #dbeafe;
    --dependency-color: #22c55e;
    --dependency-bg: #dcfce7;
    --completed-color: #94a3b8;
    --completed-bg: #f1f5f9;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* 间距 */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    
    /* 过渡 */
    --transition: 150ms ease;
}

/* 重置样式 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.5;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 隐藏元素 */
.hidden {
    display: none !important;
}

/* ============================================
   顶部导航栏
   ============================================ */
.header {
    flex-shrink: 0;
    height: 60px;
    background: white;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-5);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.header-icon {
    width: 28px;
    height: 28px;
    color: var(--primary);
}

.header-logo {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.header-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
}

.project-selector-wrap {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.project-selector {
    min-width: 140px;
    max-width: 220px;
    padding: var(--space-1) var(--space-3);
    font-size: 0.875rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    background: white;
    color: var(--gray-700);
    cursor: pointer;
}

.project-selector:hover {
    border-color: var(--gray-300);
}

.project-selector:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-bg);
}

.header-actions {
    display: flex;
    gap: var(--space-3);
}

/* ============================================
   主容器布局
   ============================================ */
.main-container {
    flex: 1 1 0;
    min-height: 0;
    display: flex;
    gap: var(--space-4);
    padding: var(--space-4);
    overflow: hidden;
}

/* 侧边栏 */
.sidebar {
    width: 25%;
    min-width: 280px;
    max-width: 360px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    flex-shrink: 0;
    overflow: hidden;
}

/* 左侧栏：固定高度容器，不随内容撑大 */
.sidebar-left {
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* 左侧栏滚动容器：固定高度，内容超出时在此滚动 */
.sidebar-left-scroll {
    flex: 1 1 0;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: var(--space-1);
}

#plugin-slots {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

/* 右侧栏：固定高度，AI 输入框始终可见 */
.sidebar-right {
    overflow: hidden;
}

.sidebar-left-scroll::-webkit-scrollbar,
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar-left-scroll::-webkit-scrollbar-track,
.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-left-scroll::-webkit-scrollbar-thumb,
.sidebar::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

.sidebar-left-scroll::-webkit-scrollbar-thumb:hover,
.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* 主内容区 */
.main-content {
    flex: 1;
    min-width: 400px;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ============================================
   卡片组件
   ============================================ */
.card {
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    overflow: visible;
    flex-shrink: 0;
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.card-icon {
    width: 18px;
    height: 18px;
    color: var(--gray-500);
}

.card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-700);
    flex: 1;
}

.card-body {
    padding: var(--space-4);
}

/* 可折叠卡片 */
.card.collapsible.collapsed .card-body {
    display: none;
}

.card.collapsible.collapsed.graph-card {
    flex: 0 0 auto;
}

.card.collapsible .collapse-icon {
    transition: transform 0.2s ease;
}

.card.collapsible.collapsed .collapse-icon {
    transform: rotate(-90deg);
}

.card-header-toggle {
    cursor: pointer;
}

.card-header-toggle .btn-collapse {
    margin-left: auto;
}

/* 右侧栏：AI 助手独占整栏，更宽显示便于完整呈现 Markdown */
.sidebar-right.sidebar-ai-only {
    display: flex;
    flex-direction: column;
    min-height: 0;
    width: 32%;
    min-width: 380px;
    max-width: 480px;
}

.sidebar-right.sidebar-ai-only .card-ai .chat-input-form {
    flex-shrink: 0;
}

.sidebar-right.sidebar-ai-only .card-ai {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.sidebar-right.sidebar-ai-only .card-ai .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding-left: var(--space-2);
}

.sidebar-right.sidebar-ai-only .card-ai .chat-container {
    max-height: none;
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-width: 0;
    padding-left: var(--space-1);
}

.badge {
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 9999px;
}

/* 图卡片特殊样式 */
.graph-card {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

.graph-header {
    justify-content: space-between;
}

.graph-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.graph-controls {
    display: flex;
    gap: var(--space-1);
}

.graph-body {
    flex: 1;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.mermaid-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    overflow: auto;
    padding: var(--space-4);
}

.mermaid {
    min-width: 100%;
}

/* ============================================
   表单组件
   ============================================ */
.form-group {
    margin-bottom: var(--space-3);
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-1);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: white;
    color: var(--gray-800);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--gray-400);
}

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

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 36px;
}

.form-arrow {
    display: flex;
    justify-content: center;
    padding: var(--space-1) 0;
    color: var(--gray-400);
}

.form-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

/* ============================================
   按钮组件
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

.btn-secondary {
    background: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-icon {
    padding: var(--space-2);
    background: transparent;
    color: var(--gray-500);
}

.btn-icon:hover:not(:disabled) {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-sm {
    padding: var(--space-1);
}

.btn-block {
    width: 100%;
}

/* ============================================
   节点列表
   ============================================ */
.node-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    max-height: 300px;
    overflow-y: auto;
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--gray-200);
}

.node-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
}

.node-item:hover {
    background: var(--primary-bg);
    border-color: var(--primary-light);
}

.node-item.active {
    background: var(--primary-bg);
    border-color: var(--primary);
}

.node-item.completed {
    opacity: 0.6;
}

.node-item.completed .node-name {
    text-decoration: line-through;
    color: var(--gray-500);
}

.node-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.node-icon.goal {
    color: var(--goal-color);
}

.node-icon.dependency {
    color: var(--dependency-color);
}

.node-content {
    flex: 1;
    min-width: 0;
}

.node-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.node-desc {
    font-size: 0.75rem;
    color: var(--gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.node-actions {
    display: flex;
    gap: var(--space-1);
    opacity: 0;
    transition: opacity var(--transition);
}

.node-item:hover .node-actions {
    opacity: 1;
}

.node-action-btn {
    padding: 4px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--gray-400);
    transition: all var(--transition);
}

.node-action-btn:hover {
    background: white;
    color: var(--gray-600);
}

.node-action-btn.delete:hover {
    color: var(--danger);
}

/* ============================================
   聊天组件
   ============================================ */
.chat-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-height: 250px;
    overflow-y: auto;
    padding: var(--space-2);
    margin-bottom: var(--space-3);
}

.chat-message {
    display: flex;
    gap: var(--space-2);
    align-items: flex-start;
}

.chat-message.user-message {
    flex-direction: row-reverse;
}

.chat-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ai-message .chat-avatar {
    background: var(--primary-bg);
    color: var(--primary);
}

.user-message .chat-avatar {
    background: var(--primary);
    color: white;
}

.chat-content {
    max-width: calc(100% - 48px);
    min-width: 0;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    font-size: 0.875rem;
    line-height: 1.5;
    overflow-wrap: break-word;
    word-break: break-word;
}

.ai-message .chat-content {
    background: var(--gray-100);
    color: var(--gray-700);
    border-top-left-radius: 2px;
}

/* 思考中状态：紧凑展示，带点点动画 */
.chat-thinking {
    display: inline-flex;
    align-items: center;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.chat-thinking-dots {
    display: inline-flex;
    align-items: center;
    margin-left: 2px;
}

.chat-thinking-dots .dot {
    width: 4px;
    height: 4px;
    margin: 0 1px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.4;
    animation: chat-dot-bounce 1.4s ease-in-out infinite;
}

.chat-thinking-dots .dot:nth-child(2) { animation-delay: 0.2s; }
.chat-thinking-dots .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes chat-dot-bounce {
    0%, 80%, 100% { opacity: 0.4; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1); }
}

/* AI 回复 Markdown 渲染 */
.chat-content p { margin: 0 0 0.5em; }
.chat-content p:last-child { margin-bottom: 0; }
.chat-content strong { font-weight: 600; }
.chat-content em { font-style: italic; }
.chat-content code {
    font-size: 0.85em;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    background: rgba(0,0,0,0.06);
}
.chat-content ul, .chat-content ol { margin: 0.5em 0; padding-left: 1.25em; }
.chat-content li { margin: 0.25em 0; }

/* Markdown 表格：不超出容器，宽表可内部横向滚动 */
.chat-content table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    border-collapse: collapse;
}
.chat-content th, .chat-content td {
    padding: 4px 8px;
    border: 1px solid var(--gray-200);
}
.chat-content pre, .chat-content blockquote {
    max-width: 100%;
    overflow-x: auto;
}

.user-message .chat-content {
    background: var(--primary);
    color: white;
    border-top-right-radius: 2px;
}

/* 思考/执行过程面板 */
.chat-process {
    margin-bottom: var(--space-2);
    font-size: 0.75rem;
}

.chat-process.hidden {
    display: none !important;
}

.chat-process-active {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: var(--space-2);
    max-height: 80px;
    overflow-y: auto;
}

.chat-process-steps {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chat-process-step {
    color: var(--gray-600);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.chat-process-step .step-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}

.chat-process-step.tool .step-dot { background: var(--success); }
.chat-process-step.done .step-dot { background: var(--gray-400); }

.chat-process-step .step-args {
    color: var(--gray-500);
    font-size: 0.8125rem;
}

.chat-process-timing {
    margin-top: var(--space-1);
    color: var(--gray-500);
    font-size: 0.6875rem;
}

.chat-process-done .chat-process-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    width: 100%;
    padding: var(--space-1) var(--space-2);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition);
}

.chat-process-done .chat-process-toggle:hover {
    background: var(--gray-100);
}

.chat-process-done .chat-process-toggle i {
    width: 12px;
    height: 12px;
    transition: transform var(--transition);
}

.chat-process-done.collapsed .chat-process-toggle i {
    transform: rotate(-90deg);
}

.chat-process-detail {
    margin-top: var(--space-1);
    padding: var(--space-2);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    max-height: 100px;
    overflow-y: auto;
    font-size: 0.6875rem;
    color: var(--gray-600);
}

.chat-model-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.chat-model-label {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.chat-model-btns {
    display: flex;
    gap: var(--space-1);
}

.chat-model-btn {
    width: 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 6px 4px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    background: white;
    color: var(--gray-500);
    cursor: pointer;
    transition: all var(--transition);
}

.chat-model-btn:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.chat-model-btn.active {
    background: var(--primary-bg);
    color: var(--primary);
    border-color: var(--primary);
}

.chat-model-btn-icon {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.chat-model-btn-icon img,
.chat-model-btn-icon svg {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.chat-model-btn-label {
    font-size: 0.5625rem;
    font-weight: 500;
    color: inherit;
    line-height: 1.2;
    text-align: center;
    word-break: break-all;
}

.chat-input-form {
    display: flex;
    gap: var(--space-2);
}

.chat-input {
    flex: 1;
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: white;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.chat-send-btn {
    padding: var(--space-2) var(--space-3);
}

/* ============================================
   候选依赖列表
   ============================================ */
.candidate-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-top: var(--space-3);
    max-height: 250px;
    overflow-y: auto;
}

.candidate-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
}

.candidate-icon {
    color: var(--warning);
    flex-shrink: 0;
}

.candidate-content {
    flex: 1;
    min-width: 0;
}

.candidate-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-800);
}

.candidate-reason {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.candidate-actions {
    display: flex;
    gap: var(--space-1);
}

.candidate-btn {
    padding: 4px 8px;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
}

.candidate-btn.accept {
    background: var(--success);
    color: white;
}

.candidate-btn.accept:hover {
    background: #16a34a;
}

.candidate-btn.reject {
    background: var(--gray-200);
    color: var(--gray-600);
}

.candidate-btn.reject:hover {
    background: var(--gray-300);
}

.candidate-btn.edit {
    background: var(--primary-bg);
    color: var(--primary);
}

.candidate-btn.edit:hover {
    background: var(--primary-light);
    color: white;
}

/* ============================================
   执行清单
   ============================================ */
.checklist-prompt-input {
    width: 100%;
    min-height: 56px;
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    resize: vertical;
    margin-bottom: var(--space-2);
}

.checklist-prompt-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-bg);
}

.checklist-plan-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-2);
}

.checklist-time-export-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: var(--space-2) 0;
    margin-bottom: var(--space-2);
    border-bottom: 1px solid var(--gray-200);
}

.checklist-time-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--gray-700);
    white-space: nowrap;
}

.checklist-time-input {
    font-size: 0.8125rem;
    padding: 6px 10px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    min-width: 0;
}

.checklist-export-btns {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: auto;
}

.checklist-export-btns .btn {
    white-space: nowrap;
}

.hours-badge {
    background: var(--success);
    color: white;
    font-size: 0.6875rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.checklist-level-header .hours-badge {
    background: var(--warning);
}

.checklist-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-height: 300px;
    overflow-y: auto;
}

.checklist-level {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.checklist-level-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-600);
    padding-bottom: var(--space-1);
    border-bottom: 1px solid var(--gray-200);
}

.level-badge {
    background: var(--primary);
    color: white;
    font-size: 0.6875rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.checklist-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.checklist-item {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--gray-50);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
}

.checklist-item:hover {
    background: var(--primary-bg);
}

.checklist-item.completed {
    opacity: 0.6;
}

.checklist-item.completed .checklist-name {
    text-decoration: line-through;
    color: var(--gray-500);
}

.checklist-item .checklist-desc {
    font-size: 0.75rem;
    color: var(--gray-500);
    width: 100%;
    margin-left: 26px;
    margin-top: var(--space-1);
}

.checklist-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition);
}

.checklist-item.completed .checklist-checkbox {
    background: var(--success);
    border-color: var(--success);
}

.checklist-checkbox svg {
    width: 12px;
    height: 12px;
    color: white;
    opacity: 0;
    transition: opacity var(--transition);
}

.checklist-item.completed .checklist-checkbox svg {
    opacity: 1;
}

.checklist-name {
    flex: 1;
    font-size: 0.875rem;
    color: var(--gray-700);
}

/* ============================================
   导出按钮组
   ============================================ */
.export-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

/* ============================================
   空状态
   ============================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    color: var(--gray-400);
    text-align: center;
}

.empty-state svg {
    width: 40px;
    height: 40px;
    margin-bottom: var(--space-2);
    opacity: 0.5;
}

.empty-state p {
    font-size: 0.875rem;
}

.graph-empty-state {
    min-height: 200px;
}

.graph-empty-title {
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: var(--space-2);
}

.graph-empty-hint {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-top: var(--space-1);
}

.text-muted {
    color: var(--gray-500);
    font-size: 0.875rem;
    margin-bottom: var(--space-3);
}

/* ============================================
   工具信息悬停卡片（顶层浮层）
   ============================================ */
.btn-info-wrap {
    position: relative;
    display: inline-flex;
}

.btn-info-wrap .btn-info {
    color: var(--gray-400);
}

.btn-info-wrap .btn-info:hover {
    color: var(--primary);
}

/* 顶层浮层：淡入淡出、淡色背景 */
.tools-tooltip-layer {
    position: fixed;
    z-index: 9999;
    pointer-events: none;
    min-width: 280px;
    max-width: 340px;
    padding: var(--space-3) var(--space-4);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.06);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.tools-tooltip-layer.tools-tooltip-visible {
    opacity: 1;
    visibility: visible;
}

.tools-hover-card-empty {
    padding: var(--space-2) var(--space-3);
}

.tools-hover-desc {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.tools-hover-title {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-1);
}

.tools-hover-intro {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-bottom: var(--space-2);
    line-height: 1.4;
}

.tools-hover-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.tools-hover-item {
    font-size: 0.875rem;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--gray-100);
    line-height: 1.5;
}

.tools-hover-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.tools-hover-item:first-child {
    padding-top: 0;
}

.tools-hover-name {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    margin-right: var(--space-1);
    margin-bottom: 2px;
}

.tools-hover-item .tools-hover-item-desc {
    display: block;
    color: var(--gray-600);
    font-size: 0.8125rem;
    margin-top: 4px;
    padding-left: 0;
}

/* ============================================
   模态框
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 400px;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
}

.modal-close {
    color: var(--gray-400);
}

.modal-close:hover {
    color: var(--gray-600);
}

.modal-body {
    padding: var(--space-4);
}

.export-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.export-option {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
}

.export-option:hover {
    background: var(--primary-bg);
    border-color: var(--primary);
}

.export-option svg {
    color: var(--primary);
}

.export-option span {
    font-size: 0.875rem;
    color: var(--gray-700);
}

/* ============================================
   提示消息
   ============================================ */
.toast-container {
    position: fixed;
    bottom: var(--space-4);
    right: var(--space-4);
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary);
    animation: slideIn 0.3s ease;
}

.toast.success {
    border-left-color: var(--success);
}

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

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

.toast-icon {
    flex-shrink: 0;
}

.toast.success .toast-icon {
    color: var(--success);
}

.toast.error .toast-icon {
    color: var(--danger);
}

.toast.warning .toast-icon {
    color: var(--warning);
}

.toast-message {
    font-size: 0.875rem;
    color: var(--gray-700);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.toast.hiding {
    animation: slideOut 0.3s ease forwards;
}

/* ============================================
   Mermaid 图表样式覆盖
   ============================================ */
.mermaid svg {
    max-width: 100%;
    height: auto;
}

/* 节点样式 */
.node rect,
.node circle,
.node ellipse,
.node polygon {
    stroke-width: 2px;
}

/* 目标节点 */
.node.goal rect,
.node.goal circle,
.node.goal ellipse,
.node.goal polygon {
    fill: var(--goal-bg);
    stroke: var(--goal-color);
}

.node.goal .label {
    color: var(--goal-color);
}

/* 依赖节点 */
.node.dependency rect,
.node.dependency circle,
.node.dependency ellipse,
.node.dependency polygon {
    fill: var(--dependency-bg);
    stroke: var(--dependency-color);
}

.node.dependency .label {
    color: var(--dependency-color);
}

/* 已完成节点 */
.node.completed rect,
.node.completed circle,
.node.completed ellipse,
.node.completed polygon {
    fill: var(--completed-bg);
    stroke: var(--completed-color);
}

.node.completed .label {
    color: var(--completed-color);
    text-decoration: line-through;
}

/* 边样式 */
.edgePath .path {
    stroke: var(--gray-400);
    stroke-width: 2px;
}

.arrowheadPath {
    fill: var(--gray-400);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1200px) {
    .sidebar {
        width: 280px;
        min-width: 260px;
    }
}

@media (max-width: 992px) {
    body {
        overflow: auto;
    }
    
    .main-container {
        flex-direction: column;
        flex: 1 1 auto;
        height: auto;
        min-height: auto;
        overflow: visible;
    }
    
    .sidebar {
        width: 100%;
        max-width: none;
    }
    
    .sidebar-left {
        overflow: visible;
    }
    
    .sidebar-left-scroll {
        flex: none;
        overflow: visible;
    }
    
    .sidebar-left,
    .sidebar-right {
        order: 2;
    }
    
    .main-content {
        order: 1;
        min-height: 500px;
    }
    
    .graph-card {
        min-height: 400px;
    }
}

@media (max-width: 576px) {
    .header {
        padding: 0 var(--space-3);
    }
    
    .header-title {
        font-size: 1rem;
    }
    
    .main-container {
        padding: var(--space-3);
    }
    
    .card-body {
        padding: var(--space-3);
    }
}

/* ============================================
   加载动画
   ============================================ */
.loading {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--gray-300);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* 骨架屏 */
.skeleton {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius);
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ============================================
   引导程序
   ============================================ */
.tour-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    pointer-events: auto;
}

.tour-overlay.hidden {
    display: none !important;
}

.tour-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    cursor: pointer;
}

.tour-mask {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.tour-mask > div {
    position: absolute;
    background: rgba(0, 0, 0, 0.5);
    cursor: pointer;
}

.tour-highlight {
    position: relative;
    z-index: 1001 !important;
    box-shadow: 0 0 0 3px var(--primary);
    border-radius: var(--radius-md);
    transition: box-shadow 0.2s ease;
}

.tour-tooltip {
    position: fixed;
    left: 50%;
    bottom: 24px;
    transform: translateX(-50%);
    z-index: 1002;
    width: 400px;
    max-width: calc(100vw - 48px);
    max-height: calc(100vh - 80px);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
    padding: var(--space-4);
    pointer-events: auto;
    overflow-y: auto;
}

/* 中间图预览步骤：引导框放左侧，不遮挡中央区域 */
.tour-tooltip.tour-tooltip-side {
    left: 24px;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
    width: 320px;
    max-width: min(320px, calc(100vw - 48px));
}

.tour-tooltip-content {
    margin-bottom: var(--space-3);
}

.tour-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-2);
}

.tour-desc {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 0;
}

.tour-progress {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-bottom: var(--space-2);
}

.tour-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-300);
    transition: all 0.2s ease;
}

.tour-dot.active {
    background: var(--primary);
    transform: scale(1.25);
}

.tour-dot.done {
    background: var(--success);
}

.tour-shortcuts {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: center;
    margin-bottom: var(--space-3);
    font-size: 0.75rem;
    color: var(--gray-500);
}

.tour-shortcuts span {
    padding: 2px 8px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
}

.tour-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--gray-200);
}

.tour-nav {
    display: flex;
    gap: var(--space-2);
}