/* ===== 全局重置 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-dark: #1a1a1f;
  --bg-panel: #22222a;
  --bg-panel-header: #2a2a35;
  --bg-item-hover: #2e2e3a;
  --bg-item-selected: #1e3a5f;
  --border-color: #333340;
  --text-primary: #e0e0e8;
  --text-secondary: #8888a0;
  --text-muted: #555568;
  --accent-blue: #4a9eff;
  --accent-green: #4aff8a;
  --accent-orange: #ffaa4a;
  --accent-red: #ff4a4a;
  --panel-width: 280px;
  --header-height: 36px;
  --scrollbar-width: 6px;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
  font-size: 13px;
  user-select: none;
  display: flex;
  flex-direction: column;
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
  width: var(--scrollbar-width);
  height: var(--scrollbar-width);
}
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: #444455;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: #5555aa; }

/* ===== 顶部工具栏 ===== */
#top-toolbar {
  width: 100%;
  height: 44px;
  flex-shrink: 0;
  background: var(--bg-panel-header);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  z-index: 200;
  /* 工具区用overflow-x:auto自行滚动，工具栏本身clip垂直溢出 */
  overflow: hidden;
}

#top-toolbar-brand {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-blue);
  letter-spacing: 1px;
  white-space: nowrap;
  padding-right: 12px;
  border-right: 1px solid var(--border-color);
  flex-shrink: 0;
}

/* 顶栏中的 tools-container：横向排列各工具组，支持滚动 */
#top-toolbar #tools-container {
  flex: 1;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 3px;
  padding: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none; /* Firefox隐藏滚动条 */
  -ms-overflow-style: none;
  min-width: 0;
}
#top-toolbar #tools-container::-webkit-scrollbar {
  display: none; /* Chrome/Safari隐藏滚动条 */
}

/* 顶栏中的工具组：横向、紧凑 */
#top-toolbar .tb-group {
  display: flex;
  align-items: center;
  gap: 1px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 2px 3px;
  flex-shrink: 0;
}

/* 顶栏分组标签 */
#top-toolbar .tb-group-label {
  font-size: 10px;
  color: var(--text-muted);
  padding: 0 4px 0 2px;
  white-space: nowrap;
  border-right: 1px solid var(--border-color);
  margin-right: 2px;
  line-height: 1;
  flex-shrink: 0;
}

/* 顶栏工具按钮 */
#top-toolbar .tool-btn {
  width: 26px;
  height: 26px;
  flex: none;
  font-size: 13px;
}

/* 顶栏文字按钮（场景操作等） */
#top-toolbar .tool-btn-text {
  height: 26px;
  padding: 0 8px;
  flex: none;
  font-size: 11px;
  white-space: nowrap;
}

/* 顶栏分隔线 */
#top-toolbar .tb-sep {
  width: 1px;
  height: 22px;
  background: var(--border-color);
  margin: 0 3px;
  flex-shrink: 0;
}

/* 顶栏右侧状态区 */
#top-toolbar-status {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
  padding-left: 12px;
  border-left: 1px solid var(--border-color);
}

.tb-status-item {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}
.tb-status-item span { color: var(--text-secondary); }

/* ===== 主布局 ===== */
#app {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ===== 3D视口区域 ===== */
#viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #0d0d12;
}

#viewport canvas {
  display: block;
  /* 不强制CSS缩放，让Three.js渲染器自己管理尺寸
     以避免TransformControls坐标偏移问题 */
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* 视口顶部信息栏 */
#viewport-info {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0,0,0,0.5);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 11px;
  color: var(--text-secondary);
  pointer-events: none;
  display: flex;
  gap: 16px;
}

/* 视口工具栏（顶部） */
#viewport-toolbar {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 4px;
  background: rgba(22,22,30,0.9);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 4px;
}

.vp-btn {
  width: 32px;
  height: 28px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: background 0.15s, color 0.15s;
  position: relative;
}
.vp-btn:hover { background: var(--bg-item-hover); color: var(--text-primary); }
.vp-btn.active { background: var(--accent-blue); color: #fff; }
.vp-btn-separator {
  width: 1px;
  background: var(--border-color);
  margin: 3px 2px;
}
.vp-btn[title]:hover::after {
  content: attr(title);
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #000;
  color: #fff;
  font-size: 11px;
  padding: 3px 7px;
  border-radius: 3px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 9999;
}

/* ===== 右侧面板容器 ===== */
#right-panel {
  width: var(--panel-width);
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border-left: 1px solid var(--border-color);
  overflow: hidden;
  flex-shrink: 0;
}

/* 属性面板沉底包装器：撑开中间空间，将属性条推到底部 */
#right-panel-spacer {
  flex: 1;
  min-height: 0;
}

/* ===== 通用面板样式 ===== */
.panel {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
  min-height: 0;
}

.panel-header {
  height: var(--header-height);
  background: var(--bg-panel-header);
  display: flex;
  align-items: center;
  padding: 0 10px;
  cursor: pointer;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border-color);
  gap: 6px;
}

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

.panel-toggle {
  font-size: 10px;
  color: var(--text-muted);
  transition: transform 0.2s;
  display: inline-block;
  width: 12px;
}
.panel.collapsed .panel-toggle { transform: rotate(-90deg); }

.panel-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  flex: 1;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  min-width: 0;
}
.panel.collapsed .panel-body { display: none; }

/* 场景节点树面板的 panel-body 允许横向滚动 */
#panel-scene-tree .panel-body {
  overflow-x: auto;
  overflow-y: auto;
}

/* ===== 面板尺寸分配 ===== */
#panel-scene-tree {
  flex: 0 0 200px;
  min-height: 36px;
}
#panel-scene-tree.collapsed {
  flex: 0 0 auto;
}

/* 素材库面板：flex:1 填充所有剩余空间，随属性面板折叠/展开自动伸缩 */
#panel-assets {
  flex: 1;
  min-height: 36px;
}
#panel-assets.collapsed {
  flex: 0 0 auto;
}

#panel-tools {
  flex: 0 0 auto;
}

/* 属性面板：固定高度，始终在底部 */
#panel-properties {
  flex: 0 0 200px;
  min-height: 36px;
}
#panel-properties.collapsed {
  flex: 0 0 auto !important;
  min-height: 0 !important;
  height: auto !important;
}

/* ===== 场景节点树 ===== */
#scene-tree-container {
  padding: 4px 0;
  /* 关键：min-width:max-content 让容器宽度跟随最宽子节点撑开，
     从而触发父级 panel-body 的 overflow-x:auto 出现横向滚动条 */
  min-width: max-content;
}

.tree-node {
  display: flex;
  align-items: center;
  height: 26px;
  padding-right: 12px;
  cursor: pointer;
  border-radius: 3px;
  margin: 1px 4px;
  position: relative;
  transition: background 0.1s;
  /* 不设固定宽度，让 flex 内容自然撑开；
     min-width: 100% 保证短节点能铺满容器宽度（hover 背景全行显示） */
  min-width: 100%;
  white-space: nowrap;
  box-sizing: border-box;
}
.tree-node:hover { background: var(--bg-item-hover); }
.tree-node.selected { background: var(--bg-item-selected); }
.tree-node.selected .tree-node-name { color: var(--accent-blue); }

.tree-node-indent {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.tree-node-toggle {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  color: var(--text-muted);
  flex-shrink: 0;
  cursor: pointer;
}
.tree-node-toggle:hover { color: var(--text-primary); }
.tree-node-toggle.empty { cursor: default; }

.tree-node-icon {
  font-size: 13px;
  margin-right: 5px;
  flex-shrink: 0;
}
.tree-node-name {
  color: var(--text-primary);
  font-size: 12px;
  white-space: nowrap;   /* 不换行，名称完整显示 */
  padding-right: 8px;
  /* 不设 overflow:hidden，让名称自然撑开节点宽度 */
}
.tree-node-visible {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
  border-radius: 2px;
  opacity: 0;
  margin-left: auto;
}
.tree-node:hover .tree-node-visible { opacity: 1; }
.tree-node-visible:hover { background: var(--bg-panel-header); color: var(--text-primary); }
.tree-node-visible.hidden { opacity: 1; color: var(--text-muted); }

/* ===== 素材库 ===== */
#assets-container {
  padding: 6px;
}

.asset-category {
  margin-bottom: 8px;
}

.asset-category-title {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 3px 4px;
  margin-bottom: 3px;
}

.asset-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

.asset-item {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 6px 4px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  transition: border-color 0.15s, background 0.15s;
}
.asset-item:hover {
  border-color: var(--accent-blue);
  background: var(--bg-item-hover);
}
.asset-item:active { transform: scale(0.95); }

.asset-icon {
  font-size: 22px;
  line-height: 1;
}
.asset-name {
  font-size: 10px;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.2;
}

/* ===== 工具面板 ===== */
#tools-container {
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tool-group {
  display: flex;
  gap: 3px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 4px;
}

.tool-btn {
  flex: 1;
  height: 30px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: background 0.15s, color 0.15s;
  position: relative;
}
.tool-btn:hover { background: var(--bg-item-hover); color: var(--text-primary); }
.tool-btn.active { background: var(--accent-blue); color: #fff; }

/* Tooltip 由JS全局div实现，此处不用::after */

/* ===== 全局 Tooltip ===== */
#ui-tooltip {
  position: fixed;
  background: rgba(0,0,0,0.88);
  color: #fff;
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 3px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 99999;
  display: none;
  border: 1px solid rgba(255,255,255,0.1);
}

/* ===== 属性面板 ===== */
#properties-container {
  padding: 8px;
}

.prop-section {
  margin-bottom: 12px;
}

.prop-section-title {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 6px;
}

.prop-row {
  display: flex;
  align-items: center;
  margin-bottom: 5px;
  gap: 6px;
}

.prop-label {
  width: 55px;
  font-size: 11px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.prop-value {
  flex: 1;
  display: flex;
  gap: 3px;
  min-width: 0;
  overflow: hidden;
}

.prop-input {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--text-primary);
  font-size: 11px;
  padding: 3px 2px;
  text-align: right;
  min-width: 0;
  width: 0;
  outline: none;
  transition: border-color 0.15s;
}
.prop-input:focus { border-color: var(--accent-blue); }
.prop-input:hover { border-color: #555568; }

.prop-input-text {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--text-primary);
  font-size: 11px;
  padding: 3px 6px;
  outline: none;
  width: 100%;
  transition: border-color 0.15s;
}
.prop-input-text:focus { border-color: var(--accent-blue); }

.prop-xyz-label {
  font-size: 10px;
  color: var(--text-muted);
  width: 12px;
  min-width: 12px;
  text-align: center;
  flex-shrink: 0;
}

.prop-color {
  width: 100%;
  height: 24px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background: var(--bg-dark);
  padding: 1px;
  cursor: pointer;
}

.prop-select {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--text-primary);
  font-size: 11px;
  padding: 3px 5px;
  outline: none;
  cursor: pointer;
}
.prop-select:focus { border-color: var(--accent-blue); }

.prop-checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
}
.prop-checkbox {
  width: 14px;
  height: 14px;
  cursor: pointer;
  accent-color: var(--accent-blue);
}

/* 空属性提示 */
.prop-empty {
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  padding: 20px 10px;
  line-height: 1.8;
}

/* ===== 状态栏 ===== */
#statusbar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 22px;
  background: rgba(0,0,0,0.6);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 10px;
  gap: 16px;
  pointer-events: none;
}
.statusbar-item {
  font-size: 11px;
  color: var(--text-muted);
}
.statusbar-item span { color: var(--text-secondary); }

/* ===== 右键菜单 ===== */
#context-menu {
  position: fixed;
  background: var(--bg-panel-header);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 4px 0;
  z-index: 10000;
  min-width: 160px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  display: none;
}
#context-menu.visible { display: block; }

.ctx-item {
  padding: 7px 14px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.1s;
}
.ctx-item:hover { background: var(--bg-item-hover); }
.ctx-item.danger { color: var(--accent-red); }
.ctx-separator {
  height: 1px;
  background: var(--border-color);
  margin: 3px 0;
}

/* ===== 弹窗/对话框 ===== */
#modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
}
#modal-overlay.visible { display: flex; }

.modal {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 24px;
  min-width: 320px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}

.modal h2 {
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.modal-btns {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

.btn {
  padding: 7px 18px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--accent-blue); color: #fff; }
.btn-secondary { background: var(--bg-panel-header); color: var(--text-primary); border: 1px solid var(--border-color); }

/* ===== 新建场景欢迎界面 ===== */
#welcome-screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(13,13,18,0.95);
  z-index: 100;
}
#welcome-screen.hidden { display: none; }

.welcome-title {
  font-size: 28px;
  font-weight: 300;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: 2px;
}
.welcome-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 40px;
}
.welcome-btn {
  padding: 12px 32px;
  background: var(--accent-blue);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}
.welcome-btn:hover { opacity: 0.9; transform: translateY(-1px); }

/* ===== 面板分割条（可拖拽调整高度） ===== */
.panel-resizer {
  height: 5px;
  background: var(--border-color);
  cursor: ns-resize;
  flex-shrink: 0;
  transition: background 0.15s;
  position: relative;
  z-index: 10;
}
.panel-resizer:hover,
.panel-resizer.dragging {
  background: var(--accent-blue);
}

/* ===== 动画 ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.2s ease; }

/* ===== 工具栏摄像机视角下拉框 ===== */
#top-toolbar .tool-select {
  height: 26px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 11px;
  padding: 0 6px;
  cursor: pointer;
  outline: none;
  max-width: 160px;
  min-width: 100px;
  flex-shrink: 0;
  transition: border-color 0.15s;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
  padding-right: 22px;
}
#top-toolbar .tool-select:hover {
  border-color: var(--accent-blue);
}
#top-toolbar .tool-select:focus {
  border-color: var(--accent-blue);
}
#top-toolbar .tool-select option {
  background: var(--bg-panel);
  color: var(--text-primary);
}

/* 场景摄像机视角模式时，视口顶部信息栏高亮 */
#viewport-info.cam-mode span:first-child {
  color: var(--accent-blue);
  font-weight: 600;
}

/* ===== 自定义模型导入区 ===== */

/* 导入按钮 */
.asset-import-btn {
  height: 22px;
  padding: 0 8px;
  background: var(--bg-panel-header);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--accent-blue);
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s;
}
.asset-import-btn:hover {
  background: var(--bg-item-hover);
  border-color: var(--accent-blue);
}

/* 拖放提示区 */
.asset-drop-hint {
  border: 1px dashed var(--border-color);
  border-radius: 5px;
  padding: 14px 8px;
  text-align: center;
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.5;
  margin: 2px 0;
  transition: border-color 0.15s, background 0.15s;
}

/* 拖放进入时高亮 */
.asset-category.drag-over .asset-drop-hint,
.asset-category.drag-over {
  border-color: var(--accent-blue);
  background: rgba(74, 158, 255, 0.07);
}

/* 已导入模型的素材项（相对定位，用于放删除按钮） */
.asset-item-imported {
  position: relative;
}

/* 导入模型的删除按钮（右上角 ×） */
.asset-import-del {
  position: absolute;
  top: 2px;
  right: 3px;
  width: 14px;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  line-height: 1;
  color: var(--text-muted);
  border-radius: 2px;
  cursor: pointer;
  z-index: 1;
  transition: color 0.1s, background 0.1s;
}
.asset-import-del:hover {
  color: var(--accent-red);
  background: rgba(255, 74, 74, 0.15);
}

/* 导入状态提示（Toast） */
.import-toast {
  position: fixed;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(20, 20, 30, 0.92);
  border: 1px solid var(--accent-blue);
  color: var(--text-primary);
  font-size: 12px;
  padding: 7px 18px;
  border-radius: 5px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 99998;
  display: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  animation: fadeIn 0.2s ease;
}
.import-toast-error {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

/* ===== 工具栏颜色选择器 ===== */
#top-toolbar .tool-color-input {
  width: 26px;
  height: 26px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: none;
  cursor: pointer;
  padding: 1px;
  outline: none;
  flex-shrink: 0;
  transition: border-color 0.15s;
}
#top-toolbar .tool-color-input:hover {
  border-color: var(--accent-blue);
}
/* 去除 Chrome 原生颜色选择器的内边距 */
#top-toolbar .tool-color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}
#top-toolbar .tool-color-input::-webkit-color-swatch {
  border: none;
  border-radius: 3px;
}

/* ==================== 格式标签 ==================== */
.asset-fmt-tag {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 1px 4px;
  margin-top: 2px;
  letter-spacing: 0.5px;
  text-align: center;
  align-self: center;
}
.asset-fmt-tag-fbx {
  color: #f0a030;
  border-color: rgba(240,160,48,0.4);
  background: rgba(240,160,48,0.08);
}

/* ==================== 骨骼调整面板 ==================== */
.skel-reset-btn {
  width: 100%;
  padding: 4px 8px;
  font-size: 11px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  text-align: center;
  transition: background 0.15s, color 0.15s;
}
.skel-reset-btn:hover {
  background: rgba(80,160,255,0.12);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.skel-bone-list {
  max-height: 320px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  margin-top: 4px;
  background: rgba(0,0,0,0.15);
}
.skel-bone-list::-webkit-scrollbar { width: 4px; }
.skel-bone-list::-webkit-scrollbar-track { background: transparent; }
.skel-bone-list::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 2px; }

.skel-bone-item {
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.skel-bone-item:last-child { border-bottom: none; }

.skel-bone-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  cursor: pointer;
  user-select: none;
  transition: background 0.12s;
}
.skel-bone-header:hover { background: rgba(80,160,255,0.08); }
.skel-bone-item.skel-bone-selected > .skel-bone-header {
  background: rgba(74,158,255,0.18);
  border-left: 2px solid var(--accent-blue);
}
.skel-bone-item.skel-bone-selected .skel-bone-name {
  color: var(--accent-blue);
}

.skel-bone-toggle {
  font-size: 9px;
  color: var(--text-muted);
  width: 10px;
  flex-shrink: 0;
}
.skel-bone-name {
  font-size: 11px;
  color: var(--text-secondary);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.skel-bone-body {
  padding: 4px 8px 6px 24px;
  background: rgba(0,0,0,0.1);
}

.skel-rot-row {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 3px;
}
.skel-rot-row:last-child { margin-bottom: 0; }

.skel-rot-axis {
  font-size: 10px;
  font-weight: 700;
  width: 14px;
  flex-shrink: 0;
  text-align: center;
}
.skel-rot-input {
  flex: 1;
  min-width: 0;
  font-size: 11px !important;
}

/* 导入 Toast 提示 */
#import-toast {
  position: fixed;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(20,20,30,0.92);
  border: 1px solid var(--accent-blue);
  color: var(--text-primary);
  font-size: 12px;
  padding: 7px 18px;
  border-radius: 5px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 99998;
  display: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  animation: fadeIn 0.2s ease;
}
#import-toast.import-toast-error {
  border-color: var(--accent-red);
  color: var(--accent-red);
}