/**
 * Designer 极简现代风格样式
 * 设计理念：少即是多，聚焦产品本身
 * 适配：高端文创 / 简约定制
 */

/* ========== CSS 变量 - 极简配色 + 响应式 ========== */
:root {
  /* 主色调 - 深海蓝 */
  --primary-color: #2A3B4C;
  --primary-hover: #1F2D3A;
  --primary-light: #3A4B5C;
  
  /* 背景色 - 高级灰系 */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F5;
  --bg-tertiary: #E0E0E0;
  
  /* 文字颜色 */
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  
  /* 边框 */
  --border-color: #E0E0E0;
  --border-hover: #2A3B4C;
  
  /* 响应式尺寸 - 使用 clamp 实现流式设计 */
  --sidebar-width: clamp(240px, 30vw, 280px);
  --preview-width: clamp(280px, 35vw, 320px);
  --spacing-xs: clamp(4px, 1vw, 8px);
  --spacing-sm: clamp(8px, 2vw, 16px);
  --spacing-md: clamp(16px, 3vw, 24px);
  --spacing-lg: clamp(24px, 4vw, 32px);
  
  /* Touch targets - 最小 44px */
  --touch-target: 44px;
  
  /* Canvas 尺寸 */
  --canvas-max-width: 551px;
  --canvas-mobile-width: calc(100vw - 32px);
  
  /* 圆角 - 极简 */
  --radius-none: 0px;
  --radius-sm: 2px;
  --radius-md: 4px;
  
  /* 过渡 */
  --transition: all 0.2s ease;
  --transition-fast: all 0.15s ease;
  --transition-slow: all 0.3s ease;
  
  /* Z-index 层级 */
  --z-sidebar: 100;
  --z-backdrop: 99;
  --z-modal: 1000;
  --z-fab: 99;
  --z-bottom-nav: 100;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.hidden {
  display: none !important;
}

/* ========== 排版 ========== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
}

h1 { font-size: 24px; }
h2 { font-size: 20px; }
h3 { font-size: 18px; }
h4 { font-size: 16px; }

p {
  margin: 0;
  line-height: 1.5;
}

/* ========== 布局容器 ========== */
.app-container {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
}

.main-workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.workspace-container {
  flex: 1;
  display: flex;
}

.design-area {
  flex: 1;
  display: flex;
  gap: 0;
}

/* ========== 侧边栏 - 极简设计 ========== */
.sidebar-toggle-wrapper {
  display: flex;
  background: var(--bg-primary);
}

.sidebar-toggle-container {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: var(--spacing-sm) 0;
  border-right: 1px solid var(--border-color);
}

.sidebar-toggle-btn {
  width: 60px;
  height: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 11px;
  font-weight: 400;
}

.sidebar-toggle-btn:hover {
  color: var(--primary-color);
  background: var(--bg-secondary);
}

.sidebar-toggle-btn.active {
  color: var(--primary-color);
  background: var(--bg-secondary);
  border-right: 2px solid var(--primary-color);
}

.sidebar-toggle-btn svg {
  width: 20px;
  height: 20px;
}

.sidebar-drawer {
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-drawer.hidden {
  display: none;
}

/* ========== 搜索框 - 极简 ========== */
.search-box {
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.search-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition);
}

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

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

/* ========== 产品卡片 - 极简无装饰 ========== */
.drawer-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  padding: var(--spacing-sm);
}

.product-item {
  position: relative;
  cursor: pointer;
  background: var(--bg-primary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}

.product-item:hover {
  border-color: var(--border-hover);
}

.product-item.active {
  border-color: var(--primary-color);
  border-width: 2px;
}

.product-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.rec-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 4px 8px;
  background: var(--primary-color);
  color: white;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
}

/* ========== 素材网格 - 极简 ========== */
.materials-grid-vertical {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
}

.material-card {
  position: relative;
  cursor: pointer;
  background: var(--bg-primary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1;
  transition: var(--transition);
}

.material-card:hover {
  border-color: var(--border-hover);
  transform: scale(0.98);
}

.material-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ========== 工具栏 - 极简图标 ========== */
.tools-sidebar {
  width: 50px;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-sm) 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
}

.tool-btn-small {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius-sm);
}

.tool-btn-small:hover {
  color: var(--primary-color);
  background: var(--bg-secondary);
}

.tool-btn-small:active {
  transform: scale(0.98);
}

.tool-btn-small svg {
  width: 18px;
  height: 18px;
}

.toolbar-separator {
  width: 100%;
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}

/* ========== 画布区域 ========== */
.canvas-wrapper {
  background: var(--bg-primary);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

#designer-container {
  background: white;
}

/* ========== 底部工具栏 - 扁平化 ========== */
.toolbar {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  align-items: center;
}

.toolbar-col {
  display: flex;
  gap: 8px;
  align-items: center;
}

.tool-btn-primary {
  background: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

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

/* ========== Faces 栏 - 极简 ========== */
.faces-bar {
  width: 80px;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-color);
  padding: var(--spacing-sm) 8px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.canvas-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-color);
}

.faces-vertical-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.face-item {
  width: 64px;
  height: 64px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}

.face-item:hover {
  border-color: var(--border-hover);
}

.face-item.active {
  border-color: var(--primary-color);
  border-width: 2px;
}

.face-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ========== 预览侧边栏 - 极简 ========== */
.preview-sidebar {
  width: 320px;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.preview-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

#previewBox {
  position: relative;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.preview-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.product-name-preview {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.preview-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.product-price-preview {
  font-size: 24px;
  font-weight: 600;
  color: var(--primary-color);
}

.price-original {
  font-size: 14px;
  color: var(--text-tertiary);
  text-decoration: line-through;
}

/* ========== 按钮 - 扁平化 ========== */
.btn-cart {
  padding: 12px 24px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
}

.btn-cart:hover {
  background: var(--primary-hover);
}

.btn-cart:active {
  transform: scale(0.98);
}

/* ========== 产品详情 - 极简 ========== */
.product-details-card {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-md);
}

.details-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px 0;
}

.details-content {
  padding-top: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.details-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.details-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ========== 变体选择器 - 极简 ========== */
.variant-selectors {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.variant-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.variant-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.color-quick-select,
.size-quick-select {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.color-btn,
.size-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}

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

.color-btn.active,
.size-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* ========== 模态框 - 极简 ========== */
.preview-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-lg);
}

.preview-modal.show {
  display: flex;
}

.preview-modal-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
  background: white;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.preview-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border: none;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-modal-close:hover {
  background: rgba(0, 0, 0, 0.8);
}

/* ========== 骨架屏 - 极简动画 ========== */
.skeleton {
  background: linear-gradient(90deg, #F5F5F5 25%, #E0E0E0 50%, #F5F5F5 75%);
  background-size: 200% 100%;
  animation: loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.skeleton-card {
  width: 100%;
  height: 150px;
}

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

/* ========== 占位符 ========== */
.placeholder-text {
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 13px;
}

/* ========== 滚动条 - 极简 ========== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

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

/* ========== 响应式设计 - Mobile First ========== */

/* ========== 移动端优先 (320px - 767px) ========== */
@media (max-width: 767px) {
  /* 全局调整 */
  :root {
    --sidebar-width: 100vw;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
  }
  
  body {
    font-size: 13px;
  }
  
  /* 侧边栏 - 全屏覆盖 */
  .sidebar-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: var(--z-sidebar);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: none;
  }
  
  .sidebar-drawer.open {
    transform: translateX(0);
  }
  
  /* 侧边栏切换按钮 - 水平布局 */
  .sidebar-toggle-wrapper {
    position: fixed;
    top: 0;

/* ========== 移动端专用组件 ========== */

/* 遮罩层 */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-backdrop);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar-backdrop.show {
  display: block;
  opacity: 1;
}

@media (max-width: 1199px) {
  .sidebar-backdrop {
    display: block;
  }
}

/* 移动端底部导航栏 */
.mobile-bottom-nav {
  display: none;
}

@media (max-width: 767px) {
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 8px;
    z-index: var(--z-bottom-nav);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    justify-content: space-around;
    align-items: center;
  }
  
  .nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 11px;
    min-width: var(--touch-target);
    cursor: pointer;
    transition: var(--transition);
  }
  
  .nav-btn svg {
    width: 20px;
    height: 20px;
  }
  
  .nav-btn.active,
  .nav-btn-primary {
    color: var(--primary-color);
    font-weight: 600;
  }
  
  .nav-btn:active {
    opacity: 0.7;
  }
}

/* 浮动操作按钮 (FAB) */
.fab {
  display: none;
}

@media (max-width: 767px) {
  .fab {
    display: flex;
    position: fixed;
    bottom: 80px;
    right: 16px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: var(--z-fab);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.3s ease;
  }
  
  .fab:active {
    transform: scale(0.95);
  }
  
  .fab svg {
    width: 24px;
    height: 24px;
  }
}

/* FAB 菜单 */
.fab-menu {
  display: none;
  position: fixed;
  bottom: 145px;
  right: 16px;
  z-index: var(--z-fab);
  flex-direction: column;
  gap: 12px;
}

.fab-menu.show {
  display: flex;
}

.fab-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 24px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.fab-item:active {
  transform: scale(0.95);
}

.fab-item svg {
  width: 20px;
  height: 20px;
}

/* 移动端预览模态框优化 */
@media (max-width: 767px) {
  .preview-modal-content {
    max-width: 95%;
    max-height: 80%;
  }
  
  .preview-modal-close {
    top: 8px;
    right: 8px;
    width: 40px;
    height: 40px;
    font-size: 24px;
  }
}

/* 性能优化 - CSS Containment */
.product-item,
.material-card,
.face-item {
  contain: layout style paint;
}

.sidebar-drawer {
  contain: layout style;
}

/* 滚动优化 */
.drawer-list,
.preview-body {
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

/* 防止文本选择 (触摸设备) */
@media (hover: none) {
  .tool-btn-small,
  .sidebar-toggle-btn,
  .product-item,
  .material-card,
  .nav-btn,
  .fab {
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
}
    left: 0;
    right: 0;
    z-index: 50;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
  }
  
  .sidebar-toggle-container {
    flex-direction: row;
    padding: 8px;
    border-right: none;
    justify-content: space-around;
  }
  
  .sidebar-toggle-btn {
    width: auto;
    height: auto;
    flex: 1;
    padding: 8px 12px;
    border-right: none;
  }
  
  .sidebar-toggle-btn.active {
    border-right: none;
    border-bottom: 2px solid var(--primary-color);
  }
  
  /* 画布区域 - 全宽 */
  .canvas-wrapper {
    width: 100%;
    padding: var(--spacing-sm);
    margin-top: 60px;
  }
  
  #designer-container {
    width: 100% !important;
    max-width: var(--canvas-mobile-width);
    height: auto !important;
    aspect-ratio: 1;
  }
  
  /* 工具栏 - 紧凑布局 */
  .tools-sidebar {
    display: none;
  }
  
  /* 底部工具栏 - 简化 */
  .toolbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
    padding: 8px;
    max-height: 120px;
    overflow-y: auto;
    z-index: 50;
  }
  
  .toolbar-col {
    flex: 1 1 auto;
    min-width: 0;
    gap: 4px;
  }
  
  .tool-btn-small {
    min-width: var(--touch-target);
    min-height: var(--touch-target);
    padding: 10px;
  }
  
  /* 隐藏次要工具 */
  .toolbar-col:nth-child(n+2) {
    display: none;
  }
  
  /* Faces 栏 - 隐藏 */
  .faces-bar {
    display: none;
  }
  
  /* 预览侧边栏 - 隐藏 */
  .preview-sidebar {
    display: none;
  }
  
  /* 产品网格 - 2列 */
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 8px;
  }
  
  .product-item {
    min-height: 120px;
  }
  
  /* 素材网格 - 2列 */
  .materials-grid-vertical {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 8px;
  }
  
  /* Touch 优化 */
  .product-item,
  .material-card,
  .tool-btn-small,
  .sidebar-toggle-btn {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    user-select: none;
  }
  
  /* 搜索框 */
  .search-input {
    font-size: 16px;
    padding: 12px;
  }
}

/* ========== 平板端 (768px - 1199px) ========== */
@media (min-width: 768px) and (max-width: 1199px) {
  /* 侧边栏 - 抽屉式 */
  .sidebar-drawer {
    position: fixed;
    left: 60px;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    z-index: var(--z-sidebar);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
  }
  
  .sidebar-drawer.open {
    transform: translateX(0);
  }
  
  /* 画布区域 - 灵活宽度 */
  .canvas-wrapper {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
  }
  
  #designer-container {
    width: 100% !important;
    max-width: 500px;
    height: auto !important;
    aspect-ratio: 1;
  }
  
  /* 工具栏 - 保持可见 */
  .tools-sidebar {
    display: flex;
  }
  
  /* 底部工具栏 - 水平布局 */
  .toolbar {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
  }
  
  .toolbar-col {
    flex: 0 1 auto;
  }
  
  /* Faces 栏 - 隐藏 */
  .faces-bar {
    display: none;
  }
  
  /* 预览侧边栏 - 可选显示 */
  .preview-sidebar {
    width: var(--preview-width);
    position: fixed;
    right: 0;
    top: 0;
    height: 100vh;
    z-index: 50;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  
  .preview-sidebar.open {
    transform: translateX(0);
  }
  
  /* 产品网格 - 3列 */
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
  }
  
  /* 素材网格 - 3列 */
  .materials-grid-vertical {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
  }
  
  /* Touch 优化 */
  .tool-btn-small,
  .sidebar-toggle-btn {
    min-width: var(--touch-target);
    min-height: var(--touch-target);
  }
}

/* ========== 桌面端 (1200px+) ========== */
@media (min-width: 1200px) {
  /* 所有元素正常显示 */
  .sidebar-drawer {
    position: static;
    transform: none;
    box-shadow: none;
  }
  
  .preview-sidebar {
    position: static;
    transform: none;
  }
  
  .faces-bar {
    display: flex;
  }
  
  /* 画布固定尺寸 */
  #designer-container {
    width: 551px !important;
    height: 551px !important;
  }
  
  /* 工具栏正常布局 */
  .toolbar {
    position: static;
    flex-wrap: wrap;
  }
  
  .toolbar-col {
    display: flex;
  }
  
  /* 产品网格 - 2列 */
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  /* 素材网格 - 2列 */
  .materials-grid-vertical {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }
}

/* ========== 超大屏幕 (1920px+) ========== */
@media (min-width: 1920px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .materials-grid-vertical {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========== 横屏优化 ========== */
@media (max-width: 767px) and (orientation: landscape) {
  .canvas-wrapper {
    padding: 8px;
  }
  
  .toolbar {
    max-height: 80px;
  }
  
  .sidebar-toggle-container {
    padding: 4px;
  }
}

/* ========== 触摸设备优化 ========== */
@media (hover: none) and (pointer: coarse) {
  /* 增大触摸目标 */
  .tool-btn-small,
  .sidebar-toggle-btn,
  .color-btn,
  .size-btn {
    min-width: var(--touch-target);
    min-height: var(--touch-target);
  }
  
  /* 移除 hover 效果 */
  .product-item:hover,
  .material-card:hover,
  .tool-btn-small:hover {
    transform: none;
  }
  
  /* 添加 active 状态 */
  .product-item:active,
  .material-card:active {
    opacity: 0.7;
  }
}

/* ========== 辅助类 ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }