/* ============================================================================
   Cupboo Tools 全局样式 v2
   ----------------------------------------------------------------------------
   设计原则：
   1. 所有颜色走变量，不硬编码 —— 暗黑模式跟随 prefers-color-scheme 自动切
   2. 控件、卡片、按钮三档分明（见 STYLE_GUIDE.md）
   3. 一处定义，全站复用；新工具页只用现成 class，不写新 CSS
   ============================================================================ */


/* ============================================================================
   1. 设计令牌 (Design Tokens)
   ============================================================================ */
:root {
  /* —— 主色 —— */
  --primary-color:       #3498db;
  --primary-hover:       #2980b9;
  --primary-light:       #ebf5fd;
  --primary-transparent: rgba(52, 152, 219, 0.1);

  /* —— 语义色 —— */
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color:  #ef4444;
  --danger-hover:  #dc2626;

  /* 语义色徽章（节省/增大、成功/失败标记） */
  --success-bg: #dcfce7;
  --success-fg: #166534;
  --danger-bg:  #fee2e2;
  --danger-fg:  #991b1b;

  /* —— 强调色（非主色）—— */
  --accent-warm:      #FF4B4B;                 /* 上传区拖拽高亮、徽章红点 */
  --accent-warm-soft: rgba(255, 75, 75, 0.05);
  --accent-warm-hard: rgba(255, 75, 75, 0.10);
  --accent-blue:      #3399ff;                 /* 裁剪框、形状框等编辑器叠层线 */
  --accent-blue-soft: rgba(51, 153, 255, 0.75);

  /* —— 文字 —— */
  --text-primary:   #2c3e50;
  --text-secondary: #666;
  --text-light:     #6b7280;
  --text-inverse:   #fff;

  /* —— 背景 —— */
  --bg-primary:   #fff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary:  #f1f3f5;
  --bg-overlay:   rgba(0, 0, 0, 0.75);
  --canvas-bg:    #fff;                        /* canvas 元素的底色 */

  /* —— 边框 —— */
  --border-color: #e9ecef;
  --border-hover: #cbd5e1;
  --border-focus: #93c5fd;

  /* —— 阴影 —— */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
               0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
               0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
               0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* —— 圆角 —— */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-full: 9999px;

  /* —— 动画 —— */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* —— 间距 —— */
  --spacing-xs:  4px;
  --spacing-sm:  8px;
  --spacing-md:  16px;
  --spacing-lg:  24px;
  --spacing-xl:  32px;
  --spacing-2xl: 48px;

  /* —— 字号 —— */
  --font-xs:   0.75rem;
  --font-sm:   0.875rem;
  --font-base: 1rem;
  --font-lg:   1.125rem;
  --font-xl:   1.25rem;
  --font-2xl:  1.5rem;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;
}


/* ============================================================================
   2. 暗黑模式 —— 仅覆盖颜色变量，结构变量（间距/圆角/动画）不变
   ============================================================================ */
[data-theme="dark"] {
  --primary-color:       #60a5fa;
  --primary-hover:       #3b82f6;
  --primary-light:       rgba(59, 130, 246, 0.15);
  --primary-transparent: rgba(96, 165, 250, 0.1);

  --success-color: #4ade80;
  --warning-color: #fbbf24;
  --danger-color:  #f87171;
  --danger-hover:  #ef4444;

  --success-bg: #064e3b;
  --success-fg: #4ade80;
  --danger-bg:  #7f1d1d;
  --danger-fg:  #f87171;

  --accent-warm:      #ff6b6b;
  --accent-warm-soft: rgba(255, 107, 107, 0.08);
  --accent-warm-hard: rgba(255, 107, 107, 0.16);
  --accent-blue:      #60a5fa;
  --accent-blue-soft: rgba(96, 165, 250, 0.75);

  --text-primary:   #e2e8f0;
  --text-secondary: #94a3b8;
  --text-light:     #94a3b8;
  --text-inverse:   #1a1a1a;

  --bg-primary:   #1e1e2e;
  --bg-secondary: #181825;
  --bg-tertiary:  #313244;
  --bg-overlay:   rgba(0, 0, 0, 0.85);
  --canvas-bg:    #1e293b;

  --border-color: #313244;
  --border-hover: #45475a;
  --border-focus: #585b70;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3),
               0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3),
               0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3),
               0 10px 10px -5px rgba(0, 0, 0, 0.2);
}


/* ============================================================================
   3. 基础样式 (Reset & Base)
   ============================================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal),
              color var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#container {
  padding: clamp(var(--spacing-lg), 3vw, var(--spacing-xl));
  background: transparent;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  flex: 1;
}


/* ============================================================================
   4. 主布局：双栏结构
   ============================================================================ */
.main-content {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(400px, 2fr);
  gap: var(--spacing-xl);
}

/* 左侧控制面板（sticky 跟随滚动） */
.side-panel,
.watermark-settings {
  position: sticky;
  top: var(--spacing-lg);
  height: fit-content;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.side-panel:hover,
.watermark-settings:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
}

.side-panel.scrollable {
  max-height: 100vh;
  overflow-y: auto;
  /* 跟左 padding 对称。滚动条 8px 在右边外侧，不占视觉留白 */
  padding-right: var(--spacing-md);
}

/* 右侧工作区 */
.work-panel,
.preview-download {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--border-color);
  align-self: start;
  width: 100%;
  min-height: 70vh;
}

.upload-section  { flex-shrink: 0; }
.preview-section { flex: 1; display: flex; flex-direction: column; min-height: 400px; }
.action-section  { flex-shrink: 0; margin-top: auto; }

.preview-grid { flex: 1; }

/* 空状态：让预览区撑高 */
.work-panel.is-empty,
.preview-download.is-empty { min-height: 70vh; }

.work-panel.is-empty .preview-section,
.preview-download.is-empty .preview-section {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.work-panel.is-empty .preview-grid,
.preview-download.is-empty #graph {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}


/* ============================================================================
   5. 控件卡片 (Control Card)
   左面板里包裹一组相关控件的容器，是面板的基本单元
   ============================================================================ */
.control-card,
.align-center-box {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  transition: all var(--transition-normal);
  border: 1px solid var(--border-color);
  margin-bottom: 0;
}

.control-card:hover,
.align-center-box:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.control-card label,
.align-center-box label {
  color: var(--text-primary);
  font-weight: 500;
  font-size: var(--font-sm);
  margin-bottom: 2px;
}

/* 卡片内的输入框 / 数字框 / 下拉 */
.control-card input[type="text"],
.control-card input[type="number"],
.control-card select,
.align-center-box input[type="text"],
.align-center-box input[type="number"],
.align-center-box select {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 6px 10px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  font-size: var(--font-sm);
  width: 100%;
  height: 32px;
}

.control-card input[type="text"]:hover,
.control-card input[type="number"]:hover,
.control-card select:hover,
.align-center-box input[type="text"]:hover,
.align-center-box input[type="number"]:hover,
.align-center-box select:hover { border-color: var(--border-hover); }

.control-card input[type="text"]:focus,
.control-card input[type="number"]:focus,
.control-card select:focus,
.align-center-box input[type="text"]:focus,
.align-center-box input[type="number"]:focus,
.align-center-box select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-transparent);
}

/* 滑块 */
.control-card input[type="range"],
.align-center-box input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  /* 用 border-hover 而非 border-color，避免暗黑模式下卡片 hover 时与 --bg-tertiary 撞色（两者同为 #313244） */
  background: var(--border-hover);
  border-radius: var(--radius-full);
  outline: none;
  padding: 0;
  margin: 10px 0;
}

.control-card input[type="range"]::-webkit-slider-thumb,
.align-center-box input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 2px solid var(--bg-primary);
  box-shadow: var(--shadow-sm);
}

.control-card input[type="range"]::-webkit-slider-thumb:hover,
.align-center-box input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

/* 颜色选择器 */
.control-card input[type="color"],
.align-center-box input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-md);
  padding: 0;
  cursor: pointer;
}

.control-card input[type="color"]::-webkit-color-swatch-wrapper,
.align-center-box input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 2px;
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
}

.control-card input[type="color"]::-webkit-color-swatch,
.align-center-box input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: var(--radius-sm);
}

/* 控件内部水平/换行布局 */
.control-row    { flex: 1; display: flex; flex-wrap: wrap; gap: 20px; }
.control-inline { flex: 1; display: flex; align-items: center; gap: 10px; }
.control-stack  { display: flex; flex-direction: column; align-items: stretch; gap: 6px; width: 100%; min-width: 0; }
/* 在 row 内部时自动平分宽度 */
.control-row > .control-stack { flex: 1; width: auto; }


/* ============================================================================
   6. 排印 (Typography)
   ============================================================================ */
h1 {
  font-size: var(--font-2xl);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

article {
  color: var(--text-secondary);
  font-size: var(--font-lg);
  line-height: 1.7;
}

article a {
  color: var(--primary-color);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-bottom: 1px solid transparent;
  font-weight: 500;
}

article a:hover {
  border-bottom-color: var(--primary-color);
  opacity: 0.9;
}


/* ============================================================================
   7. 按钮体系（三档：主按钮、模板按钮、紧凑按钮）
   ----------------------------------------------------------------------------
   .btn         主操作按钮（"下载全部"、"清空全部"等大动作）
   .button-grid-btn / .template-btn  模板按钮（左侧面板里 6 个一格的快捷选项）
   .mini-btn / .flip-btn / .style-btn 紧凑按钮（同侧面板内细分操作）
   ============================================================================ */

/* —— 7.1 主按钮 .btn —— */
.btn {
  background: var(--primary-color);
  color: var(--text-inverse);
  border: none;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-size: var(--font-base);
}

.btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

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

.btn-icon { font-size: 1.2em; line-height: 1; }

/* 重置按钮（虚线边、低调） */
.btn.btn-reset,
.btn.btn-reset-short {
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px dashed var(--border-color);
  transition: all var(--transition-fast);
}

.btn.btn-reset:hover,
.btn.btn-reset-short:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn.btn-reset:active,
.btn.btn-reset-short:active {
  transform: translateY(0) scale(0.98);
  box-shadow: none;
}

/* Studio 页特化（保留） */
#resetCropBtn,
#resetShapeBtn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}
#resetCropBtn  { min-height: 44px; padding: 10px; }
#resetShapeBtn { min-height: 36px; padding: 6px 10px; }

/* —— 7.2 模板按钮 .button-grid-btn / .template-btn —— */
.button-grid,
.template-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xs);
  margin: var(--spacing-xs) 0;
}

.button-grid-btn,
.template-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 8px;
  font-size: 13px;
  min-height: 32px;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  /* 允许换行到两行，避免"分销商专用"被裁成"分销商…" */
  white-space: normal;
  word-break: keep-all;
  line-height: 1.25;
}

.button-grid-btn:hover,
.template-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-color);
  transform: translateY(-1px);
}

.button-grid-btn:active,
.template-btn:active { transform: translateY(0); }

.button-grid-btn.active,
.template-btn.active {
  border-color: var(--primary-color);
  background: var(--primary-light);
  color: var(--primary-color);
  font-weight: 600;
}

/* —— 7.3 紧凑按钮 .mini-btn / .flip-btn / .style-btn —— */
.mini-btn {
  flex: 1;
  padding: 8px;
  font-size: 12px;
  cursor: pointer;
  user-select: none;
  text-align: center;
  white-space: nowrap;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mini-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-color);
  color: var(--primary-color);          /* 悬停:里面的文字+图标也变主色(照 boobooShiping .pill-btn:hover,不只外框) */
  transform: translateY(-1px);
}

/* 带文字的复制钮:图标 + 文案 排一行居中(.cp-label 里放中英双份,复制成功时整体换成「已复制」) */
.cp-btn { display: inline-flex; align-items: center; gap: 5px; }

.mini-btn:active { transform: translateY(0); }

.button-group .mini-btn {
  flex: 1;
  padding: 8px 10px;
  font-size: 12px;
  white-space: nowrap;
}

.style-buttons { display: flex; gap: var(--spacing-xs); }

.style-btn {
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: var(--font-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.style-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--border-hover);
}

.style-btn.active {
  background: var(--primary-color);
  color: var(--text-inverse);
  border-color: var(--primary-color);
}

.flip-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.flip-btn {
  padding: 6px 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 13px;
  transition: all var(--transition-fast);
  min-height: 36px;
}

.flip-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-color);
  transform: translateY(-1px);
}

.flip-btn:active { transform: translateY(0); }

.flip-btn.active {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background: var(--primary-light);
  font-weight: 600;
}

.flip-icon { font-size: 18px; line-height: 1; }
.flip-text { font-size: 12px; }

.rotate-btns { display: flex; gap: 10px; margin-top: 10px; }

/* —— 7.4 卡片底部三联按钮（复制/下载/删除）—— */
.button-group-container {
  width: 100%;
  display: flex;
  gap: 6px;
  margin-top: 8px;
  align-items: center;
}

.button-group-container .download-btn {
  flex: 1;
  height: 28px;
  padding: 0 8px;
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--primary-color);
  color: var(--text-inverse);
  border: 1px solid var(--primary-color);
}

.button-group-container .download-btn:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.button-group-container .download-btn:active {
  transform: translateY(0) scale(0.96);
  box-shadow: none;
}

.button-group-container .copy-btn {
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.button-group-container .copy-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.button-group-container .delete-btn {
  background: var(--danger-color);
  color: var(--text-inverse);
  border: 1px solid var(--danger-color);
}

.button-group-container .delete-btn:hover {
  background: var(--danger-hover);
  border-color: var(--danger-hover);
}

/* 复制成功的瞬时反馈（由 JS 加 class，500ms 后自动移除） */
.button-group-container .copy-btn.is-success {
  background: var(--success-color);
  color: var(--text-inverse);
  border-color: var(--success-color);
}

/* clearAll 时按钮的反馈状态（替代之前的 inline style） */
.btn.is-clearing,
.button-group-container .delete-btn.is-clearing {
  background: var(--danger-fg);
  border-color: var(--danger-fg);
  color: transparent;
  pointer-events: none;
}


/* ============================================================================
   8. 上传区
   ============================================================================ */
.upload-box { position: relative; width: 100%; }
.upload-box input[type="file"] { display: none; }

.upload-area {
  min-height: 200px;
  margin-bottom: 0;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  will-change: transform, box-shadow, border-color, background-color;
  transition:
    transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275),
    box-shadow 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275),
    border-color 0.2s ease,
    background-color 0.2s ease;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--accent-warm);
  background: var(--accent-warm-soft);
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.upload-area:active {
  transform: scale(0.98) translateY(0);
  box-shadow: none;
  background: var(--accent-warm-hard);
}

.upload-area:focus-visible {
  outline: 2px solid var(--accent-warm);
  outline-offset: 4px;
}

.upload-hint { text-align: center; z-index: 1; }

.upload-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.upload-title {
  color: var(--text-primary);
  font-size: var(--font-lg);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  transition: color var(--transition-fast);
}

.upload-tip {
  color: var(--text-light);
  font-size: var(--font-sm);
  margin-top: var(--spacing-sm);
}

/* 进度条 */
.upload-progress {
  background: var(--bg-primary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.progress-bar {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-inner {
  height: 100%;
  width: 0%;
  background: var(--primary-color);
  transition: width var(--transition-fast);
  border-radius: inherit;
}

.progress-text {
  margin-top: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: var(--font-sm);
  text-align: center;
}


/* ============================================================================
   9. 主操作按钮组
   ============================================================================ */
.button-group {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.button-group .btn { flex: 1; min-width: 120px; }

.action-section .button-group {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
}

.action-section .button-group .btn {
  height: 48px;
  font-size: 15px;
  border-radius: var(--radius-md);
}


/* ============================================================================
   10. 预览网格 + 单图模式
   ============================================================================ */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: 0;
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  min-height: 200px;
}

.preview-grid.empty {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

.placeholder-text {
  color: var(--text-light);
  font-size: 16px;
  pointer-events: none;
}

/* —— 单图模式：合并自旧版重复定义，去掉冗余 —— */
.preview-grid.single-mode {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 400px;
  padding: 20px;
  gap: 0;
  background: transparent;
}

.preview-grid.single-mode .image-container {
  flex: 1;
  width: 100%;
  max-width: 100%;
  height: 100%;
  margin: 0 auto;
  border: none;
  box-shadow: none;
  background: transparent;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
  box-sizing: border-box;
}

.preview-grid.single-mode canvas {
  max-width: 100%;
  max-height: 55vh;
  width: auto;
  height: auto;
  object-fit: contain;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-color);
  background-color: var(--canvas-bg);
}

.preview-grid.single-mode .image-info {
  width: auto;
  min-width: 300px;
  max-width: 600px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 8px 24px;
  margin-top: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.preview-grid.single-mode .file-name {
  font-weight: 600;
  color: var(--text-primary);
}

/* 单图模式下选中态需要"消失"（不要边框、阴影、位移） */
.preview-grid.single-mode .image-container.selected {
  border: none;
  background: transparent;
  box-shadow: none;
  transform: none;
}

/* —— 多图模式下的卡片 —— */
.image-container {
  position: relative;
  cursor: pointer;
  border: 2px solid transparent;
  border-radius: 16px;
  padding: 16px;
  transition: all 0.2s ease;
  margin-bottom: 20px;
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  height: 100%;
}

.image-container canvas {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  cursor: zoom-in;
}

.image-container canvas:hover { transform: scale(1.02); }

.image-info {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.file-name {
  color: var(--text-primary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: var(--font-sm);
}

.image-container:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
}

.image-container.selected {
  border-color: var(--primary-color);
  background: var(--primary-light);
  box-shadow: 0 0 0 1px var(--primary-color), var(--shadow-md);
  transform: translateY(-2px);
}

/* 文件元信息 */
.file-meta {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}
.file-meta .dim-line {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.size-badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  padding: 1px 5px;
  border-radius: 3px;
  margin-left: 6px;
  font-weight: 600;
  vertical-align: middle;
}
.size-badge.saving   { background: var(--success-bg); color: var(--success-fg); }
.size-badge.increase { background: var(--danger-bg);  color: var(--danger-fg); }


/* ============================================================================
   11. 预览模态框（点 canvas 看大图）
   ============================================================================ */
#previewModal {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  display: flex;             /* 由 .is-hidden 控制是否显示，对齐工具类体系 */
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  will-change: opacity, transform;
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
}
#previewModal.active { opacity: 1; }

#previewImage {
  max-width: 90%;
  max-height: 90vh;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  transition: all var(--transition-normal);
  cursor: zoom-out;
}
#previewModal.active #previewImage { transform: scale(1); }


/* ============================================================================
   12. 通用弹窗 (gm-modal)
   ============================================================================ */
.gm-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.45);
  z-index: 9999;
}
.gm-modal.active { display: flex; }

.gm-modal-card {
  width: min(92vw, 720px);
  max-height: 90vh;
  overflow: auto;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.gm-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  font-weight: 600;
}

.gm-modal-body    { display: flex; gap: var(--spacing-sm); }
.gm-modal-actions { display: flex; gap: var(--spacing-sm); justify-content: flex-end; }


/* ============================================================================
   13. Toast
   ============================================================================ */
#toast {
  position: fixed;
  bottom: max(var(--spacing-xl), 5vh);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  opacity: 0;
  transition: all var(--transition-normal);
  max-width: min(90%, 400px);
  width: max-content;
}
#toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}


/* ============================================================================
   13.5  Status Bar (页面内常驻消息条)
   弹窗的反面 — 显示在页面里固定位置,有关闭按钮,不抢占焦点
   ============================================================================ */
.status-bar {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  margin: var(--spacing-sm) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  font-size: var(--font-sm);
  line-height: 1.5;
  color: var(--text-primary);
  animation: status-bar-in 0.25s ease;
}
@keyframes status-bar-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.status-bar-icon {
  flex-shrink: 0;
  font-size: 16px;
  line-height: 1.5;
}
.status-bar-msg {
  flex: 1;
  word-break: break-word;
}
.status-bar-close {
  flex-shrink: 0;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.status-bar-close:hover {
  background: rgba(0, 0, 0, 0.06);
  color: var(--text-primary);
}
[data-theme="dark"] .status-bar-close:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* 四档语义色 */
.status-bar.is-info {
  background: rgba(59, 130, 246, 0.08);
  border-color: rgba(59, 130, 246, 0.3);
  color: #1e40af;
}
.status-bar.is-success {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.3);
  color: #047857;
}
.status-bar.is-warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.3);
  color: #92400e;
}
.status-bar.is-danger {
  background: rgba(239, 68, 68, 0.08);
  border-color: rgba(239, 68, 68, 0.3);
  color: #b91c1c;
}
[data-theme="dark"] .status-bar.is-info    { color: #93c5fd; }
[data-theme="dark"] .status-bar.is-success { color: #6ee7b7; }
[data-theme="dark"] .status-bar.is-warning { color: #fcd34d; }
[data-theme="dark"] .status-bar.is-danger  { color: #fca5a5; }


/* ============================================================================
   14. 工具类 (Utilities)
   优先用工具类替代行内样式
   ============================================================================ */
.is-hidden  { display: none !important; }

.text-xs     { font-size: 12px; }
.text-sm     { font-size: 13px; }
.text-muted  { color: var(--text-secondary); }
.text-light  { color: var(--text-light); }
.text-danger { color: var(--danger-color); }
.text-accent { color: var(--primary-color); font-weight: 600; }

.mt-xs { margin-top: 4px; }
.mt-sm { margin-top: 6px; }
.mt-md { margin-top: 10px; }

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.row         { display: flex; align-items: center;     gap: var(--spacing-sm); }
.row-top     { align-items: flex-start; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-sm); }
.row-wrap    { flex-wrap: wrap; }

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

.w-full   { width: 100%; }
.flex-1   { flex: 1; }
.flex-15  { flex: 1.5; }

.font-mono {
  font-family: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
               "Liberation Mono", "Courier New", monospace;
}

.font-select-wrapper { width: 200px; position: relative; }

.select-default {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 6px;
}

.panel-note {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 6px;
  line-height: 1.5;
}

/* 对比度/状态警告条（颜色二维码、密码强度等场景） */
.contrast-warning.is-danger {
  background-color: var(--danger-bg);
  border-color: var(--danger-fg);
  color: var(--danger-fg);
}
.contrast-warning.is-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-color: var(--warning-color);
  color: var(--warning-color);
}
[data-theme="dark"] .contrast-warning.is-warning {
  background-color: rgba(251, 191, 36, 0.12);
  color: var(--warning-color);
}


/* ============================================================================
   15. Studio 专属（裁剪/形状/旋转编辑器）
   ============================================================================ */
.control-section { margin-bottom: 25px; }
.section-title   { font-weight: 600; margin-bottom: 12px; display: block; }

.control-header {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  margin-bottom: 8px;
}
.control-header label { color: var(--text-secondary); font-weight: 500; }
.control-header span  { color: var(--primary-color); font-family: monospace; font-weight: 600; }

.control-group { margin-bottom: 5px; }

.input-row { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; }
.input-group { flex: 1; }
.input-group label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.input-group input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  border-radius: 6px;
  font-size: 14px;
  height: 32px;
}
.input-group input:focus {
  border-color: var(--primary-color);
  outline: none;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-primary);
  cursor: pointer;
  margin-top: 10px;
  user-select: none;
}
.checkbox-label input { width: auto; margin: 0; cursor: pointer; }

.val-display {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 13px;
}

.mode-switch,
.platform-tabs,
.tab-nav {
  display: flex;
  background: var(--bg-secondary);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 12px;
  gap: 4px;
  align-items: center;
  border: 1px solid var(--border-color);
  overflow-x: auto;
  scrollbar-width: none;
}
.mode-switch::-webkit-scrollbar,
.platform-tabs::-webkit-scrollbar,
.tab-nav::-webkit-scrollbar { display: none; }

.mode-opt,
.platform-tab,
.tab-btn {
  flex: 1;
  text-align: center;
  padding: 6px 4px;
  font-size: 13px;
  cursor: pointer;
  border-radius: 6px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  font-weight: 500;
  white-space: nowrap;
  background: transparent;
  border: none;
  margin: 0;
}
.mode-opt:hover,
.platform-tab:hover,
.tab-btn:hover { color: var(--text-primary); }

.mode-opt.active,
.platform-tab.active,
.tab-btn.active {
  background: var(--bg-primary);
  color: var(--primary-color);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

.section-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}
.section-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

/* 紧凑变体：用于 currency / emoji 这类信息密集的卡片网格
   独立 modifier，可以叠加在 .section-card / .hover-float-card 等任意卡片上 */
.is-compact {
  padding: 12px 14px;
  gap: 4px;
}

/* 危险/警示卡片变体：用于 decoder 顶部"溯源取证模式"提示卡
   背景刻意用 5% 透明度的红色 —— 大色块用 --danger-bg 太重 */
.control-card.is-danger {
  border-color: var(--danger-color);
  background: rgba(239, 68, 68, 0.05);
}
[data-theme="dark"] .control-card.is-danger {
  background: rgba(248, 113, 113, 0.08);
}
.control-card.is-danger:hover {
  border-color: var(--danger-color);
  background: rgba(239, 68, 68, 0.08);
}
[data-theme="dark"] .control-card.is-danger:hover {
  background: rgba(248, 113, 113, 0.12);
}
.control-card.is-danger h3 {
  color: var(--danger-color);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: 0;
}
.control-card.is-danger p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* 错误占位（处理流程失败后替换 #graph 占位区）—— 跟 .preview-grid.empty 同级 */
.error-state {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(239, 68, 68, 0.05);
  border-radius: var(--radius-md);
  padding: 40px 20px;
  box-sizing: border-box;
  text-align: center;
}
[data-theme="dark"] .error-state {
  background: rgba(248, 113, 113, 0.08);
}
.error-state .error-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
}
.error-state h3 {
  margin: 0 0 12px 0;
  color: var(--danger-color);
}
.error-state p {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.error-state .error-action {
  margin-top: var(--spacing-lg);
  width: 120px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  padding: 2px 2px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--font-sm);
}
.section-body { display: flex; flex-direction: column; gap: var(--spacing-sm); }

.tab-pane         { display: none; animation: fadeIn 0.3s ease; }
.tab-pane.active  { display: block; }

/* 调色滑块（暖色/绿粉/色相）—— 滑块底色是有意义的视觉提示，故保留固定渐变 */
#tempRange,
#tintRange,
#hueRange {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  outline: none;
  margin-top: 5px;
  margin-bottom: 5px;
}
#tempRange::-webkit-slider-thumb,
#tintRange::-webkit-slider-thumb,
#hueRange::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid var(--border-hover);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: transform 0.1s;
}
#tempRange::-webkit-slider-thumb:hover,
#tintRange::-webkit-slider-thumb:hover,
#hueRange::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  border-color: var(--text-light);
}
#tempRange { background: linear-gradient(to right, #3b82f6 0%, #cbd5e1 50%, var(--warning-color) 100%); }
#tintRange { background: linear-gradient(to right, #22c55e 0%, #cbd5e1 50%, #d946ef 100%); }
#hueRange  { background: linear-gradient(to right, red, yellow, lime, cyan, blue, magenta, red); }

[data-theme="dark"] #tempRange { background: linear-gradient(to right, #3b82f6 0%, #475569 50%, var(--warning-color) 100%); }
[data-theme="dark"] #tintRange { background: linear-gradient(to right, #22c55e 0%, #475569 50%, #d946ef 100%); }

.lock-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-light);
  margin-top: 22px;
  border-radius: 4px;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.lock-btn.active {
  color: var(--primary-color);
  background: var(--primary-light);
}

.size-hint {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* 比例选择器 */
.ratio-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 12px;
  box-shadow: var(--shadow-sm);
}
.ratio-panel .ratio-tip {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 4px 2px 10px;
  line-height: 1.5;
}

.ratio-selector { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }

.ratio-btn {
  position: relative;
  padding: 8px 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  border-radius: 6px;
  cursor: pointer;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
  font-size: 12px;
  color: var(--text-secondary);
}
.ratio-btn.hidden { display: none; }
.ratio-btn:hover {
  border-color: var(--primary-color);
  background: var(--bg-secondary);
  transform: translateY(-1px);
}
.ratio-btn.active {
  border-color: var(--primary-color);
  background: var(--primary-light);
  color: var(--primary-color);
  font-weight: 600;
}
.ratio-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  color: inherit;
}
.ratio-desc {
  font-size: 11px;
  line-height: 1.2;
  color: inherit;
  opacity: 0.75;
  font-weight: normal;
}

.ratio-badge {
  position: absolute;
  top: -6px; right: -6px;
  background: var(--accent-warm);
  color: var(--text-inverse);
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 999px;
  z-index: 2;
  box-shadow: 0 2px 6px rgba(255, 75, 75, 0.25);
  white-space: nowrap;
  transform: scale(0.9);
}

.crop-preview-overlay {
  position: absolute;
  pointer-events: none;
  box-sizing: border-box;
  outline: 1px solid var(--accent-blue);
  outline-color: var(--accent-blue-soft);
  border: none;
  background: transparent;
}

/* 形状选择器 */
.shape-selector { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }

.shape-btn {
  padding: 8px 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  border-radius: 6px;
  cursor: pointer;
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.shape-btn:hover {
  border-color: var(--primary-color);
  background: var(--bg-secondary);
  transform: translateY(-1px);
}
.shape-btn.active {
  border-color: var(--primary-color);
  background: var(--primary-light);
  color: var(--primary-color);
  font-weight: 600;
}
.shape-emoji { font-size: 16px; }

/* 内嵌裁剪面板 */
.inline-crop-panel {
  width: 100%;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 10px;
  margin-bottom: 12px;
  display: none;
  flex-direction: column;
  gap: 8px;
}
.inline-crop-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.inline-crop-title {
  font-weight: 700;
  font-size: 13px;
  color: var(--text-primary);
}
.inline-crop-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.inline-crop-live {
  margin-top: 0;
  font-size: 12px;
}
.inline-crop-body {
  background: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  position: relative;
  overflow: visible;
}
.inline-crop-body img { max-width: 100%; display: block; }
.inline-crop-hint { font-size: 12px; color: var(--text-secondary); margin: 0; }

#inlineShapeOverlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  overflow: visible;
}

.shape-frame {
  position: absolute;
  border: 1px solid var(--accent-blue);
  border-radius: 8px;
  pointer-events: auto;
  touch-action: none;
  cursor: move;
  background: transparent;
  box-shadow: none;
}

.shape-handle {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--accent-blue);
  border-radius: 999px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
  cursor: nwse-resize;
  touch-action: none;
}
.shape-handle-nw { top: -5px;    left: -5px; }
.shape-handle-ne { top: -5px;    right: -5px; }
.shape-handle-sw { bottom: -5px; left: -5px; }
.shape-handle-se { bottom: -5px; right: -5px; }
.shape-handle-n  { top: -5px;    left: 50%;  transform: translateX(-50%); cursor: ns-resize; }
.shape-handle-s  { bottom: -5px; left: 50%;  transform: translateX(-50%); cursor: ns-resize; }
.shape-handle-e  { right: -5px;  top: 50%;   transform: translateY(-50%); cursor: ew-resize; }
.shape-handle-w  { left: -5px;   top: 50%;   transform: translateY(-50%); cursor: ew-resize; }

#inlineShapePanel .cropper-view-box,
#inlineShapePanel .cropper-dashed,
#inlineShapePanel .cropper-line,
#inlineShapePanel .cropper-point,
#inlineShapePanel .cropper-center { display: none !important; }


/* ============================================================================
   16. PDF 叠层预览
   ============================================================================ */
.canvas-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}
.pdf-stack-box {
  position: relative;
  display: inline-block;
}

/* 修正：加上 canvas 标签，使权重达到 (0,2,1) */
.preview-grid canvas.pdf-base-canvas {
  display: block;
  position: relative;
  z-index: 1;
  max-width: 100%;
  height: auto;
  background: var(--canvas-bg);
}

.preview-grid canvas.pdf-wm-canvas {
  position: absolute;
  left: 0; top: 0;
  z-index: 2;
  max-width: 100%;
  height: auto;
  pointer-events: none;
  background: transparent;
}

/* 新增：专门针对单图模式下水印画布的权重压制 (0,3,1) */
/* 防止水印层叠加上不必要的实色背景、边框和阴影 */
.preview-grid.single-mode canvas.pdf-wm-canvas {
  background: transparent;
  border: none;
  box-shadow: none;
}


/* ============================================================================
   17. ASCII 输出
   ============================================================================ */
.ascii-output {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 0.6;
  font-weight: 400;
  white-space: pre;
  text-align: center;
  color: var(--text-primary);
  background: var(--bg-secondary);
  margin: 0;
  padding: var(--spacing-md);
  width: 100%;
  height: 100%;
  overflow: auto;
  box-sizing: border-box;
  border-radius: var(--radius-md);
}
.ascii-output.is-bold { font-weight: 700; }


/* ============================================================================
   17.5  Studio (图片编辑器) 专用 class
   ============================================================================ */

/* 屏幕外的 SVG 滤镜定义容器(为 feColorMatrix 等准备的 hidden host) */
.svg-filter-defs {
  position: absolute;
  width: 0;
  height: 0;
  display: none;
}

/* 内联裁剪/形状面板: 默认隐藏,激活时 flex */
.inline-crop-panel { display: none; }
.inline-crop-panel.is-active { display: flex; }

/* 进入裁剪/形状模式时,主预览 graph 临时让位 (替代 graph.style.display = 'none') */
#graph.is-hidden-while-cropping { display: none; }

/* 形状叠加层根 SVG (固定相对画布定位) */
.shape-overlay-svg {
  position: absolute;
  left: 0;
  top: 0;
  pointer-events: none;
}

/* 形状叠加层 root 切换显隐 */
.shape-overlay-root { display: block; }
.shape-overlay-root.is-hidden { display: none; }

/* 文件元数据行: 原尺寸 → 输出尺寸 + 体积变化 */
.dim-line {
  display: flex;
  align-items: center;
}
.dim-line .dim-old {
  color: var(--text-light, #94a3b8);
}
.dim-line .dim-arrow {
  margin: 0 4px;
}
.dim-line .dim-new {
  color: var(--primary-color);
  font-weight: 600;
}
.size-line {
  margin-top: 2px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.size-text {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}


/* ============================================================================
   18. Emoji & 国旗
   ============================================================================ */
.flag-icon {
  font-size: 1.8em;
  line-height: 1.2;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  font-family: "Noto Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol",
               "Apple Color Emoji", sans-serif;
  vertical-align: middle;
}


/* ============================================================================
   19. 全站通用浮动卡片 (.hover-float-card)
   用于：世界时钟、汇率看板、表情块 等
   ----------------------------------------------------------------------------
   注意：保留 !important 是因为这个 class 故意要"压过"页面里可能存在的旧样式
   （向后兼容）。后续页面旧样式清理干净后，可以去掉 !important。
   ============================================================================ */
.hover-float-card {
  background-color: var(--bg-primary) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-lg) !important;
  padding: var(--spacing-md) !important;
  box-shadow: var(--shadow-sm) !important;
  box-sizing: border-box !important;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1) !important;
  position: relative;
}

.hover-float-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg) !important;
  border-color: var(--primary-color) !important;
  background-color: var(--primary-light) !important;
}

.hover-float-card:active {
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-sm) !important;
  border-color: var(--primary-hover) !important;
  background-color: var(--bg-secondary) !important;
  transition: all 0.1s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* 世界时钟"夜晚态"：跟随暗黑变量，不再写死 catppuccin 色 */
.hover-float-card.is-night {
  background-color: var(--bg-tertiary) !important;
  border-color: var(--border-hover) !important;
}
.hover-float-card.is-night:hover {
  background-color: var(--primary-transparent) !important;
  border-color: var(--primary-color) !important;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4) !important;
}
.hover-float-card.is-night:active {
  background-color: var(--bg-secondary) !important;
  border-color: var(--border-color) !important;
  box-shadow: var(--shadow-sm) !important;
}
.hover-float-card.is-night .city-name,
.hover-float-card.is-night .time-display { color: var(--text-primary); }
.hover-float-card.is-night .location-row { color: var(--text-secondary); }
.hover-float-card.is-night .dot-separator { background: var(--border-hover); }
.hover-float-card.is-night .timezone-tag {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}
.hover-float-card.is-night .time-display {
  color: var(--primary-color);
  text-shadow: 0 0 20px var(--primary-transparent);
}
.hover-float-card.is-night .code-badge {
  background: var(--primary-transparent);
  color: var(--primary-color);
  border-color: var(--primary-transparent);
}


/* ============================================================================
   20. 快捷键说明
   ============================================================================ */
.shortcuts-info {
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.shortcuts-title {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--spacing-xs);
}

.shortcut-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-xs);
}

.shortcut-item kbd {
  background: var(--bg-primary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--primary-color);
  font-family: var(--font-mono);
  font-size: var(--font-xs);
  min-width: 50px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.shortcut-item span { color: var(--text-secondary); }

.description ul { padding: 0; margin: 8px 0; }
.description li { display: inline-block; margin-right: 15px; }
.description li:last-child { margin-right: 0; }


/* ============================================================================
   21. 主题切换按钮（保留兼容，目前 sidebar.js 走系统跟随，无显式按钮）
   ============================================================================ */
.theme-switch {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}
.theme-switch:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.theme-icon { font-size: var(--font-xl); }
.theme-text {
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--text-primary);
}


/* ============================================================================
   22. 响应式
   ============================================================================ */
@media (max-width: 1024px) {
  .main-content { grid-template-columns: 1fr; gap: var(--spacing-lg); }
  .side-panel,
  .watermark-settings { position: relative; top: 0; order: 1; }
  .work-panel,
  .preview-download   { order: 2; padding: var(--spacing-md); }
  .button-group        { flex-direction: column; }
  .button-group .btn   { width: 100%; }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 16px;
    --spacing-xl: 24px;
  }
  #container { margin: 0; padding: var(--spacing-md); border-radius: 0; gap: var(--spacing-md); }
  .main-content { gap: var(--spacing-md); }
  .side-panel,
  .watermark-settings { padding: var(--spacing-lg); }
  .control-card,
  .align-center-box   { padding: var(--spacing-md); }
  .button-group       { flex-direction: column; }
  .button-group .btn  { width: 100%; }
  .preview-grid       { padding: var(--spacing-sm); }
  .button-grid,
  .template-buttons   { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .work-panel,
  .preview-download   { padding: var(--spacing-sm); }
  .upload-area        { min-height: 150px; padding: var(--spacing-lg); }
  .shortcuts-grid     { grid-template-columns: repeat(2, 1fr); }
  .preview-nav        { padding: 15px 10px; font-size: 16px; }
  .action-section .button-group .btn { height: 44px; font-size: 14px; }
}

@media (min-width: 1400px) {
  .main-content { grid-template-columns: minmax(350px, 1fr) minmax(600px, 2.5fr); }
  .preview-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}

@media (min-width: 1920px) {
  :root {
    --spacing-lg:  32px;
    --spacing-xl:  48px;
    --spacing-2xl: 64px;
  }
  .preview-grid { grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); }
}

@media print {
  #container { margin: 0; padding: 0; box-shadow: none; max-width: 100%; }
  .preview-grid { display: block; }
  .image-container {
    page-break-inside: avoid;
    break-inside: avoid;
    margin-bottom: var(--spacing-xl);
  }
  .theme-switch,
  .button-group-container,
  .upload-area,
  .button-group { display: none !important; }
}


/* ============================================================================
   23. 滚动条 / 选区 / 动画偏好
   ============================================================================ */
::-webkit-scrollbar       { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

::selection {
  background: var(--primary-light);
  color: var(--primary-color);
}

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ============================================================================
   24. 首页介绍 Hero（Cupboo 品牌 + 本地处理卖点）
   ============================================================================ */
.home-hero {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 26px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary-light), var(--bg-primary) 70%);
  box-shadow: var(--shadow-sm);
}
.home-hero h1 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}
.home-hero h1 .hero-mark {
  color: var(--primary-color);
  letter-spacing: 0.5px;
}
.home-hero .hero-sub {
  margin: 0;
  max-width: 72ch;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-secondary);
}
.home-hero .hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 2px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: var(--primary-transparent);
  color: var(--primary-color);
  font-size: 12px;
  font-weight: 600;
}
.hero-badge svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
@media (max-width: 768px) {
  .home-hero { padding: 18px; }
  .home-hero h1 { font-size: 1.15rem; }
}

/* 统一内联 SVG 图标（替换正文彩色 emoji）*/
.ic { width:1em; height:1em; display:inline-block; vertical-align:-0.125em; flex-shrink:0; fill:none; stroke:currentColor; stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
.upload-icon .ic { stroke-width:1.5; }
.shape-emoji .ic { width:20px; height:20px; }

/* 首页咘咘欢迎语（温暖·免费分享调性）*/
.hero-greet { display:flex; align-items:center; gap:12px; padding:10px 14px; background:var(--bg-primary); border:1px solid var(--border-color); border-radius:var(--radius-full); box-shadow:var(--shadow-sm); width:fit-content; max-width:100%; margin-bottom:4px; }
.hero-greet .hero-mascot { width:40px; height:40px; border-radius:50%; object-fit:cover; flex-shrink:0; box-shadow:0 3px 10px rgba(226,85,154,0.25); }
.hero-greet p { margin:0; font-size:0.9rem; line-height:1.5; color:var(--text-primary); }
.hero-greet strong { color:#e0559a; }
@media (max-width:768px){ .hero-greet { border-radius:var(--radius-lg); } .hero-greet p { font-size:0.85rem; } }

/* ============================================================================
   图片工具页 手机端(与 studio 一致):预览吸顶 + 图片贴合 + 图上图标 + 暗黑自适配
   仅对 <body class="img-tool"> 生效(index / decoder / pdf-watermark)。
   studio 自己有独立 inline 版本,不加这个 class,互不影响。
   ============================================================================ */
.add-more-btn { display: none; }                 /* ＋添加只在手机出现 */
.download-btn .ic-btn { display: none; }          /* 桌面：按钮显示文字、不显示图标 */

@media (max-width: 768px) {
  body.img-tool .main-content { display: flex; flex-direction: column; }
  body.img-tool .work-panel {
    order: 1; position: sticky; top: 0; z-index: 30;
    min-height: 0 !important; max-height: 46vh; overflow: hidden;
    display: flex; flex-direction: column; padding: 10px; gap: 8px;
    background: var(--bg-primary); box-shadow: 0 6px 14px -6px rgba(0,0,0,.22);
  }
  body.img-tool .side-panel { order: 2; padding-bottom: 16px; }

  body.img-tool .work-panel .upload-section { flex-shrink: 0; }
  body.img-tool .work-panel .upload-area { min-height: 96px !important; padding: 12px !important; }
  body.img-tool .work-panel .upload-tip { display: none; }
  body.img-tool .work-panel:has(#graph:not(.empty)) .upload-section { display: none; }

  body.img-tool .work-panel:has(#graph:not(.empty)) .add-more-btn {
    display: inline-flex; align-items: center; gap: 4px;
    position: absolute; top: 8px; right: 8px; z-index: 8;
    height: 32px; padding: 6px 12px; box-sizing: border-box;
    border: 1px solid var(--border-color); border-radius: 999px;
    background: var(--bg-primary); color: var(--text-primary);
    font-size: 13px; font-weight: 600; line-height: 1; cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,.18);
  }
  body.img-tool .add-more-btn svg { width: 15px; height: 15px; }

  body.img-tool .work-panel .preview-section { flex: 0 0 auto; min-height: 0; overflow: hidden; }
  body.img-tool .work-panel .preview-grid { min-height: 0; padding: 6px; }

  /* 单图：居中贴合固定框 */
  body.img-tool .work-panel .preview-grid.single-mode { display: flex; align-items: center; justify-content: center; padding: 6px; min-height: 0 !important; height: auto !important; }
  body.img-tool .work-panel .preview-grid.single-mode .image-container { max-width: 100%; padding: 0; display: flex; align-items: center; justify-content: center; flex: 0 0 auto !important; height: auto !important; min-height: 0 !important; }
  body.img-tool .work-panel .preview-grid.single-mode canvas { max-width: 100%; max-height: 38vh; width: auto; height: auto; object-fit: contain; display: block; }

  /* 多图：一排等大卡片，左右滑动 */
  body.img-tool .work-panel .preview-grid:not(.empty):not(.single-mode) {
    display: flex !important; flex-wrap: nowrap !important; align-items: flex-start;
    overflow-x: auto; overflow-y: hidden; gap: 10px; padding: 6px;
    scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch;
  }
  body.img-tool .work-panel .preview-grid:not(.single-mode) .image-container { flex: 0 0 82%; width: 82%; margin: 0; padding: 0; scroll-snap-align: center; height: auto !important; min-height: 0 !important; }
  body.img-tool .work-panel .preview-grid:not(.single-mode) canvas { width: 100%; max-height: 38vh; height: auto; object-fit: contain; display: block; }

  /* 文件名/尺寸隐藏；信息容器清框 */
  body.img-tool .work-panel .image-info { background: transparent !important; border: none !important; box-shadow: none !important; padding: 0 !important; margin: 0 !important; min-width: 0 !important; }
  body.img-tool .work-panel .image-info .file-name,
  body.img-tool .work-panel .image-info .file-meta { display: none !important; }

  /* 复制/下载/删除 → 图片左上角一排小图标钮 */
  body.img-tool .work-panel .image-container { position: relative; }
  body.img-tool .work-panel .button-group-container { position: absolute; top: 8px; left: 8px; z-index: 7; display: flex; gap: 6px; margin: 0; }
  body.img-tool .work-panel .button-group-container .download-btn {
    width: 32px; height: 32px; min-width: 0; padding: 0; flex: 0 0 auto;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 999px; border: 1px solid var(--border-color);
    background: var(--bg-primary); color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0,0,0,.18);
  }
  body.img-tool .work-panel .button-group-container .download-btn .ic-btn { display: block; width: 16px; height: 16px; }
  body.img-tool .work-panel .button-group-container .btn-label { display: none; }
  body.img-tool .work-panel .button-group-container .delete-btn { color: var(--danger-color); }

  /* 手机上不放全局“下载全部/清空全部” */
  body.img-tool .work-panel .action-section { display: none !important; }
}

@media (max-width: 768px) {
  /* pdf-watermark 叠层画布(底图+水印)：base 与 wm 用完全相同约束，保证对齐；只补 max-height 进吸顶框 */
  body.img-tool .work-panel .preview-grid canvas.pdf-base-canvas,
  body.img-tool .work-panel .preview-grid canvas.pdf-wm-canvas {
    width: auto !important; height: auto !important;
    max-width: 100% !important; max-height: 36vh !important;
  }
}

/* ============================================================================
   文本类工具页 手机端(ascii / hash):预览吸顶 + 输出框内双向滚动(治横向溢出)
   仅对 <body class="text-tool"> 生效。预览不是图片,所以不套“图上图标”那套。
   ============================================================================ */
@media (max-width: 768px) {
  body.text-tool .main-content { display: flex; flex-direction: column; }
  body.text-tool .work-panel {
    order: 1; position: sticky; top: 0; z-index: 30;
    min-height: 0 !important; max-height: 46vh; overflow: hidden;
    display: flex; flex-direction: column; padding: 10px; gap: 8px;
    background: var(--bg-primary); box-shadow: 0 6px 14px -6px rgba(0,0,0,.22);
  }
  body.text-tool .side-panel { order: 2; padding-bottom: 16px; }

  body.text-tool .work-panel .upload-section { flex-shrink: 0; }
  body.text-tool .work-panel .upload-area { min-height: 96px !important; padding: 12px !important; }
  body.text-tool .work-panel:has(.preview-grid:not(.empty)) .upload-section { display: none; }

  body.text-tool .work-panel:has(.preview-grid:not(.empty)) .add-more-btn {
    display: inline-flex; align-items: center; gap: 4px;
    position: absolute; top: 8px; right: 8px; z-index: 8;
    height: 32px; padding: 6px 12px; box-sizing: border-box;
    border: 1px solid var(--border-color); border-radius: 999px;
    background: var(--bg-primary); color: var(--text-primary);
    font-size: 13px; font-weight: 600; line-height: 1; cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,.18);
  }
  body.text-tool .add-more-btn svg { width: 15px; height: 15px; }

  body.text-tool .work-panel .preview-section { flex: 1 1 auto; min-height: 0; overflow: hidden; }
  /* 关键：预览区块级 + 双向滚动 —— 宽字符画/长结果列表在框内滚，不撑破屏幕 */
  body.text-tool .work-panel .preview-grid {
    display: block !important; min-height: 0 !important; height: 100%; padding: 6px;
    overflow: auto; -webkit-overflow-scrolling: touch;
  }
  body.text-tool .work-panel .ascii-output { width: 100%; max-width: 100%; height: 100%; overflow: auto; }

  /* 空态(没输出)时不显示 复制/下载/清空 */
  body.text-tool .work-panel:has(.preview-grid.empty) .action-section { display: none; }

  /* action-section → 浮在预览左上角的一排小图标钮(和 water 图片页一致) */
  body.text-tool .work-panel .action-section {
    position: absolute; top: 8px; left: 8px; z-index: 9;
    margin: 0; padding: 0; background: none; border: none; box-shadow: none;
  }
  body.text-tool .work-panel .action-section .button-group { flex-direction: row; gap: 6px; margin: 0; background: none; padding: 0; border: none; border-radius: 0; }
  body.text-tool .work-panel .action-section .btn {
    width: 32px; height: 32px; min-width: 0; padding: 0; flex: 0 0 auto;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 999px; border: 1px solid var(--border-color);
    background: var(--bg-primary); color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0,0,0,.18);
  }
  body.text-tool .work-panel .action-section .btn .btn-icon { display: inline-flex; }
  body.text-tool .work-panel .action-section .btn .btn-icon svg { width: 16px; height: 16px; display: block; }
  body.text-tool .work-panel .action-section .btn > span:not(.btn-icon) { display: none; }  /* 只留图标 */
  body.text-tool .work-panel .action-section .btn.btn-danger { color: var(--danger-color); }
}


/* ============================================================================
   操作成功反馈(.copied 复制 / .downloaded 下载)—— 全站同一条规则,不再分两套。
   点后按钮/元素整个填主色(蓝底 + 反色字/图标),图标临时切成 ✓,400ms 复原。
   由 GenmoorUtils._copiedFlash / _doneFlash 加/移除;✓ 的 <polyline> 由 JS 临时替换 svg 内容。
   用在按钮,也用在"点一下就复制"的卡片/表情格。!important 压过各类按钮的 hover 态。

   2026-10 统一:原先下载用绿(--success-color)、复制用蓝,且时长 1000ms vs 400ms,
   意图是「蓝=进剪贴板、绿=存到本地」的语义区分。实际用下来两种反馈同屏出现时显得不成套,
   遂并成一条——要改回按语义分色,把 .downloaded 单独拆出来给 --success-color 即可。
   ============================================================================ */
.copied,
.copied:hover,
.downloaded,
.downloaded:hover {
  background: var(--primary-color) !important;
  border-color: var(--primary-color) !important;
  color: var(--text-inverse) !important;
  transform: none !important;   /* 成功瞬间不跟 hover 上浮,稳住 */
}
.copied .ic,
.copied .ic-btn,
.downloaded .ic,
.downloaded .ic-btn { stroke: currentColor; }   /* ✓ 跟随反色 currentColor */

/* 闪烁期间临时打开图标槽。`.download-btn .ic-btn{display:none}`(本文件 2254 行,studio 等页还有本地副本)
   让这类按钮桌面端只显示文字、不显示图标 —— 那是刻意的,别去掉。但「✓ 已下载 / ✓ 已复制」里的 ✓ 必须看得见,
   否则 index、studio 这些用 .download-btn 的页面反馈就跟其它页不是一套(表现:只有文字变色、没有对号)。
   选择器用三个类,特异性高过那条隐藏规则,不需要 !important;宽高用 em 跟随按钮字号,
   各页若已自定尺寸(keygen 14/17px、short 15px、移动端 16px)仍以各页为准。 */
.download-btn.copied .ic-btn,
.download-btn.downloaded .ic-btn { display: block; width: 1em; height: 1em; }

/* 处理中忙碌态(.fb-busy):转圈。手机图标钮没有文字进度尤其需要;桌面保留文字进度,spinner 仅手机显示 */
@media (max-width: 768px) {
  .fb-busy { position: relative !important; pointer-events: none; }
  .fb-busy > * { visibility: hidden !important; }
  .fb-busy::after {
    content: ""; position: absolute; inset: 0; margin: auto;
    width: 16px; height: 16px; box-sizing: border-box;
    border: 2px solid currentColor; border-top-color: transparent;
    border-radius: 50%; animation: fb-spin .7s linear infinite;
  }
}
@keyframes fb-spin { to { transform: rotate(360deg); } }