/* ============================================================
   知识图谱可视化 - 样式系统
   深色主题 · 玻璃拟态 · 粒子风格
   ============================================================ */

/* ---------- 变量 ---------- */
:root {
  /* 背景色 */
  --bg-deep: #060912;
  --bg-base: #0a0e1a;
  --bg-panel: rgba(18, 24, 40, 0.72);
  --bg-panel-solid: #121828;
  --bg-hover: rgba(255, 255, 255, 0.06);
  --bg-active: rgba(0, 212, 255, 0.12);

  /* 边框 */
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --border-active: rgba(0, 212, 255, 0.4);

  /* 文字 */
  --text: #e8ecf4;
  --text-secondary: #a0aabc;
  --text-muted: #5a6378;
  --text-accent: #00d4ff;

  /* 强调色 */
  --c-cyan: #00d4ff;
  --c-purple: #7c3aed;
  --c-pink: #ec4899;
  --c-amber: #f59e0b;
  --c-green: #10b981;
  --c-indigo: #6366f1;
  --c-red: #ef4444;

  /* 布局 */
  --sidebar-left-w: 280px;
  --sidebar-right-w: 320px;
  --toolbar-h: 52px;
  --radius: 12px;
  --radius-sm: 8px;

  /* 过渡 */
  --t-fast: 0.15s ease;
  --t-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Canvas 渲染色 */
  --canvas-bg: #0a0e1a;
  --canvas-trail: rgba(10, 14, 26, 0.12);
  --canvas-label-bg: rgba(18, 24, 40, 0.85);
  --canvas-label-text: #e8ecf4;
  --canvas-label-muted: rgba(160, 170, 188, 0.7);
  --canvas-radial-1: rgba(0, 212, 255, 0.04);
  --canvas-radial-2: rgba(124, 58, 237, 0.04);
  --canvas-border-rgb: 255, 255, 255;
  --scrollbar-thumb: rgba(255, 255, 255, 0.1);
  --scrollbar-hover: rgba(255, 255, 255, 0.2);
  --chip-bg: rgba(255, 255, 255, 0.04);
  --input-bg: rgba(0, 0, 0, 0.3);
  --detail-cat-bg: rgba(255, 255, 255, 0.06);
  --detail-tag-bg: rgba(255, 255, 255, 0.05);
  --detail-conn-bg: rgba(255, 255, 255, 0.03);
  --meta-card-bg: rgba(255, 255, 255, 0.03);
  --toast-shadow: rgba(0, 212, 255, 0.15);
}

/* ---------- 浅色主题 ---------- */
[data-theme="light"] {
  --bg-deep: #e8ebf2;
  --bg-base: #f0f2f8;
  --bg-panel: rgba(255, 255, 255, 0.72);
  --bg-panel-solid: #ffffff;
  --bg-hover: rgba(0, 0, 0, 0.04);
  --bg-active: rgba(0, 130, 200, 0.1);

  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --border-active: rgba(0, 130, 200, 0.4);

  --text: #1a1f2e;
  --text-secondary: #4a5268;
  --text-muted: #8a92a8;
  --text-accent: #0080c8;

  --c-cyan: #0080c8;
  --c-purple: #6d28d9;
  --c-pink: #db2777;
  --c-amber: #d97706;
  --c-green: #059669;
  --c-indigo: #4f46e5;
  --c-red: #dc2626;

  /* Canvas 渲染色 */
  --canvas-bg: #f0f2f8;
  --canvas-trail: rgba(240, 242, 248, 0.15);
  --canvas-label-bg: rgba(255, 255, 255, 0.9);
  --canvas-label-text: #1a1f2e;
  --canvas-label-muted: rgba(74, 82, 104, 0.7);
  --canvas-radial-1: rgba(0, 130, 200, 0.05);
  --canvas-radial-2: rgba(109, 40, 217, 0.05);
  --canvas-border-rgb: 255, 255, 255;
  --scrollbar-thumb: rgba(0, 0, 0, 0.12);
  --scrollbar-hover: rgba(0, 0, 0, 0.22);
  --chip-bg: rgba(0, 0, 0, 0.03);
  --input-bg: rgba(0, 0, 0, 0.03);
  --detail-cat-bg: rgba(0, 0, 0, 0.04);
  --detail-tag-bg: rgba(0, 0, 0, 0.03);
  --detail-conn-bg: rgba(0, 0, 0, 0.02);
  --meta-card-bg: rgba(0, 0, 0, 0.02);
  --toast-shadow: rgba(0, 130, 200, 0.15);
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  user-select: none;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.app {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-base);
  transition: background-color 0.3s ease;
}

/* ---------- 侧边栏通用 ---------- */
.sidebar {
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  transition: margin var(--t-base), transform var(--t-base);
  z-index: 10;
  flex-shrink: 0;
}

.sidebar-left {
  width: var(--sidebar-left-w);
}

.sidebar-right {
  width: var(--sidebar-right-w);
  border-right: none;
  border-left: 1px solid var(--border);
}

.sidebar.collapsed {
  margin-left: calc(-1 * var(--sidebar-left-w));
}

.sidebar-right.collapsed {
  margin-right: calc(-1 * var(--sidebar-right-w));
}

/* ---------- 侧边栏头部 ---------- */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}

.sidebar-title .icon {
  color: var(--c-cyan);
  flex-shrink: 0;
}

.node-count {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-cyan);
  background: rgba(0, 212, 255, 0.1);
  padding: 2px 10px;
  border-radius: 20px;
  border: 1px solid rgba(0, 212, 255, 0.2);
}

/* ---------- 项目选择器 ---------- */
.project-selector {
  position: relative;
  padding: 10px 14px 6px;
  flex-shrink: 0;
  z-index: 20;
}

.project-selector-trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--t-fast);
  user-select: none;
}

.project-selector-trigger:hover {
  border-color: var(--c-cyan);
  background: var(--input-bg);
}

.project-trigger-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--c-cyan), var(--c-purple));
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  letter-spacing: 0.5px;
}

.project-trigger-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.project-trigger-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-trigger-desc {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-trigger-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--t-fast);
}

.project-selector.open .project-trigger-arrow {
  transform: rotate(180deg);
}

.project-selector-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 14px;
  right: 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--t-fast);
  max-height: 320px;
  overflow-y: auto;
}

.project-selector.open .project-selector-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.project-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  cursor: pointer;
  transition: background var(--t-fast);
  border-bottom: 1px solid var(--border);
}

.project-option:last-child {
  border-bottom: none;
}

.project-option:hover {
  background: var(--chip-bg);
}

.project-option.active {
  background: rgba(0, 212, 255, 0.08);
}

.project-option-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--c-cyan), var(--c-purple));
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.project-option-info {
  flex: 1;
  min-width: 0;
}

.project-option-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.project-option-desc {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-option-check {
  flex-shrink: 0;
  color: var(--c-cyan);
  opacity: 0;
}

.project-option.active .project-option-check {
  opacity: 1;
}

/* ---------- 搜索框 ---------- */
.search-box {
  position: relative;
  padding: 12px 14px 8px;
  flex-shrink: 0;
}

.search-box .search-icon {
  position: absolute;
  left: 26px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 9px 12px 9px 36px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: all var(--t-fast);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box input:focus {
  border-color: var(--border-active);
  background: rgba(0, 212, 255, 0.05);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

/* ---------- 分类过滤器 ---------- */
.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 4px 14px 10px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
}

.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
  background: var(--chip-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.cat-chip:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
  color: var(--text);
}

.cat-chip.active {
  background: var(--bg-active);
  border-color: var(--border-active);
  color: var(--text);
}

.cat-chip .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---------- 知识列表 ---------- */
.knowledge-list-wrapper {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 0;
}

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

.knowledge-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px;
  cursor: pointer;
  transition: all var(--t-fast);
  border-left: 3px solid transparent;
  position: relative;
}

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

.knowledge-item.active {
  background: var(--bg-active);
  border-left-color: var(--c-cyan);
}

.knowledge-item .item-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 8px currentColor;
}

.knowledge-item .item-label {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color var(--t-fast);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.knowledge-item:hover .item-label,
.knowledge-item.active .item-label {
  color: var(--text);
}

.knowledge-item .item-cat {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: auto;
  flex-shrink: 0;
}

/* ---------- 画布区域 ---------- */
.canvas-area {
  flex: 1;
  min-width: 0;
  position: relative;
  overflow: hidden;
  background: var(--bg-base);
  background-image:
    radial-gradient(circle at 20% 30%, var(--canvas-radial-1) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, var(--canvas-radial-2) 0%, transparent 50%);
}

.canvas-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.particle-canvas {
  z-index: 1;
}

.graph-canvas {
  z-index: 2;
  cursor: grab;
}

.graph-canvas.dragging {
  cursor: grabbing;
}

.graph-canvas.node-hover {
  cursor: pointer;
}

/* 编辑模式 */
.graph-canvas.edit-mode {
  cursor: crosshair;
}

.graph-canvas.edit-mode.node-hover {
  cursor: cell;
}

.graph-canvas.connecting {
  cursor: copying;
}

/* ---------- 工具栏 ---------- */
.canvas-toolbar {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 5;
  display: flex;
  gap: 8px;
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
}

.toolbar-group {
  display: flex;
  gap: 2px;
  padding: 0 4px;
}

.toolbar-group + .toolbar-group {
  border-left: 1px solid var(--border);
  padding-left: 8px;
  margin-left: 4px;
}

.tool-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--t-fast);
}

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

.tool-btn.active {
  background: var(--bg-active);
  color: var(--c-cyan);
}

#btnConnect.active {
  animation: connect-pulse 1.5s ease-in-out infinite;
}

@keyframes connect-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.3); }
  50% { box-shadow: 0 0 0 4px rgba(0, 212, 255, 0); }
}

/* ---------- 宽松度面板 ---------- */
.toolbar-looseness {
  position: relative;
}

.looseness-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 200px;
  padding: 14px 16px;
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px var(--shadow);
  z-index: 10;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all var(--t-fast);
}

.looseness-panel.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.looseness-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.looseness-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.looseness-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

.looseness-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: var(--chip-bg);
  outline: none;
  cursor: pointer;
}

.looseness-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-cyan);
  cursor: pointer;
  border: 2px solid var(--bg-panel);
  box-shadow: 0 2px 6px rgba(0, 212, 255, 0.4);
  transition: transform var(--t-fast);
}

.looseness-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.looseness-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-cyan);
  cursor: pointer;
  border: 2px solid var(--bg-panel);
  box-shadow: 0 2px 6px rgba(0, 212, 255, 0.4);
}

.looseness-hint {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 10px;
  color: var(--text-secondary);
}

/* ---------- 底部信息栏 ---------- */
.canvas-info {
  position: absolute;
  bottom: 16px;
  left: 16px;
  z-index: 5;
  display: flex;
  gap: 16px;
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 16px;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.info-item strong {
  color: var(--text);
  font-weight: 600;
}

.info-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 6px currentColor;
}

/* ---------- 侧边栏切换按钮 ---------- */
.sidebar-toggle {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 6;
  width: 24px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--t-fast);
}

.sidebar-toggle:hover {
  color: var(--c-cyan);
  border-color: var(--border-active);
}

.toggle-left {
  left: 0;
  border-left: none;
  border-radius: 0 8px 8px 0;
}

.toggle-right {
  right: 0;
  border-right: none;
  border-radius: 8px 0 0 8px;
}

/* ---------- 节点详情面板 ---------- */
.node-detail {
  flex: 1;
  overflow-y: auto;
  padding: 0;
}

.detail-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 300px;
  color: var(--text-muted);
  gap: 16px;
}

.detail-empty p {
  font-size: 13px;
  text-align: center;
  line-height: 1.8;
}

.detail-content {
  padding: 20px;
  animation: detailFadeIn var(--t-base);
}

@keyframes detailFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.detail-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.detail-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.detail-title-area {
  flex: 1;
  min-width: 0;
}

.detail-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.3;
}

.detail-category {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--detail-cat-bg);
}

.detail-category .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.detail-section {
  margin-bottom: 18px;
}

.detail-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.detail-description {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.detail-tag {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--detail-tag-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.detail-connections {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.connection-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: var(--detail-conn-bg);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--t-fast);
}

.connection-item:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
  transform: translateX(2px);
}

.connection-item .conn-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.connection-item .conn-label {
  font-size: 12px;
  color: var(--text-secondary);
  flex: 1;
}

.connection-item .conn-type {
  font-size: 10px;
  color: var(--text-muted);
}

.detail-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.meta-card {
  background: var(--meta-card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

.meta-card .meta-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.meta-card .meta-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

/* ---------- 自定义滚动条 ---------- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 10px;
}

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

/* ---------- Toast 通知 ---------- */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: 100;
  background: var(--bg-panel-solid);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: 13px;
  color: var(--text);
  box-shadow: 0 4px 24px var(--toast-shadow);
  opacity: 0;
  pointer-events: none;
  transition: all var(--t-base);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  :root {
    --sidebar-left-w: 240px;
    --sidebar-right-w: 280px;
  }
}

@media (max-width: 600px) {
  .sidebar-left {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    z-index: 20;
  }
  .sidebar-right {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    z-index: 20;
  }
  .canvas-info {
    flex-wrap: wrap;
    gap: 8px;
    padding: 6px 10px;
  }
}

/* ---------- 编辑模式：节点名称输入框 ---------- */
.node-add-input {
  position: absolute;
  z-index: 100;
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--c-cyan);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 212, 255, 0.15);
  animation: node-input-in 0.18s ease;
}

.node-add-input.show {
  display: flex;
}

@keyframes node-input-in {
  from { opacity: 0; transform: translateY(-6px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.node-add-input input {
  width: 180px;
  padding: 6px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: border-color var(--t-fast);
}

.node-add-input input:focus {
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.15);
}

.node-add-hint {
  font-size: 10px;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.5px;
}