/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  line-height: 1.4;
  white-space: nowrap;
  /* 覆盖全局 a:hover 的下划线：按钮链接悬停时不应出现下划线 */
  text-decoration: none;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--color-primary);
  /* 顶部极淡高光增加层次；用 background-image 而非改背景色，白字对比度不受影响 */
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0));
  color: #fff;
  /* 主操作按钮加柔和阴影：在同级按钮中视觉更突出，明确"主操作" */
  box-shadow: 0 1px 2px rgba(37, 99, 235, 0.28);
}
.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 3px 8px rgba(37, 99, 235, 0.34);
  transform: translateY(-1px);
}
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; transform: none; }

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

.btn-text {
  background: none; color: var(--color-link);
  padding: 4px 8px;
}
.btn-text:hover { background: var(--color-primary-light); }

.btn-sm { padding: 6px 12px; font-size: 13px; }

.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #DC2626; }
[data-theme='dark'] .btn-danger:hover { background: #EF4444; }

/* Cards */
.tool-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}

.tool-card h3 {
  font-size: 16px; font-weight: 600;
  margin-bottom: 14px;
  padding: 4px 0 4px 12px;
  color: var(--color-text);
  display: flex; align-items: center; gap: 8px;
  position: relative;
}
.tool-card h3::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  border-radius: 2px;
  background: var(--color-primary);
  opacity: 0.7;
}

.tool-card h3 .iconify { font-size: 20px; color: var(--color-link); }

/* 工具卡片内底部主操作按钮组：统一上方间距 */
.tool-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
/* filter 模块的条件列表与下方按钮之间 */
.filter-conditions + .btn,
.filter-conditions + button { margin-top: 12px; }
/* 通用：tool-card 内 form-row/tool-options 后紧跟独立按钮时给间距 */
.tool-card .form-row + .btn,
.tool-card .form-row + button,
.tool-card .tool-options + .btn,
.tool-card h3 + button.btn { margin-top: 14px; }
/* 工具卡片内嵌套 .tool-card 间距 */
.tool-card .tool-card { margin-bottom: 12px; }
.tool-card .tool-card:last-child { margin-bottom: 0; }

.tool-options { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.tool-options label { display: flex; align-items: center; gap: 8px; font-size: 14px; cursor: pointer; }
/* form-row 是 flex 容器且 align-items: flex-end，此时 tool-options 自带的 12px 下外边距
   会让它比其他控件（input/select/button）高出 12px，破坏底部对齐 —— 行内去掉 */
.form-row > .tool-options { margin-bottom: 0; }
.tool-hint { font-size: 13px; color: var(--color-text-muted); margin-bottom: 12px; }

/* Forms */
.form-row {
  display: flex; align-items: flex-end; gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--color-text-secondary); }
/* 连续 form-row 之间增加垂直间距（除第一个） */
.tool-card .form-row:not(:first-child),
.tool-card form:not(:first-child) { margin-top: 14px; }
/* 连续 form-group 之间增加垂直间距 */
.tool-card .form-group + .form-group,
.tool-card .form-group + .form-row,
.tool-card .form-row + .form-group { margin-top: 4px; }
/* 表单内联按钮组：水平排列且对齐 */
.form-group-inline { flex-direction: row; align-items: flex-end; gap: 10px; flex-wrap: wrap; }

input[type="text"], input[type="number"], select, textarea {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), background-color var(--transition-slow);
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--color-border-focus);
  box-shadow: var(--shadow-focus);
}
/* 表单控件悬停提示：此前只有 :focus 有反馈，鼠标用户缺少可交互暗示 */
input:not(:focus):hover, select:not(:focus):hover, textarea:not(:focus):hover { border-color: var(--color-text-muted); }

select { cursor: pointer; min-width: 120px; }
select[multiple] { min-height: 80px; }

textarea.code-editor {
  font-family: var(--font-mono);
  font-size: 13px;
  width: 100%;
  resize: vertical;
  tab-size: 2;
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--color-surface);
}

.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.upload-zone-sm { padding: 20px; }

.upload-icon { font-size: 48px; color: var(--color-text-muted); margin-bottom: 12px; }
.upload-text { font-size: 15px; color: var(--color-text-secondary); margin-bottom: 4px; }
.upload-hint { font-size: 13px; color: var(--color-text-muted); }

/* Tables */
.table-container { margin-top: 16px; }
.table-wrapper { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-family: var(--font-mono);
  background: var(--color-bg);
}

.data-table th {
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--color-border);
  position: sticky; top: 0;
  white-space: nowrap;
  font-family: var(--font-sans);
}

.data-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.data-table tr:hover td { background: var(--color-surface); }
.data-table tr:last-child td { border-bottom: none; }

.row-number {
  color: var(--color-text-muted);
  font-size: 12px;
  width: 88px;
  min-width: 88px;
  text-align: right;
  white-space: nowrap;
}

/* 冻结行号列（横向滚动时保持可见） */
.data-table th.row-number,
.data-table td.row-number {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--color-bg);
}

.data-table thead th.row-number {
  z-index: 3;
  background: var(--color-surface);
}

.data-table tr:hover td.row-number { background: var(--color-surface); }

/* 行号列悬停操作按钮：上移 / 下移 / 复制 / 删除 */
.row-actions { display: none; gap: 1px; vertical-align: middle; }

/* hover 显示；focus-within 让键盘用户 Tab 进该行时也能看到并操作（此前只有鼠标能用） */
.data-table tr:hover .row-actions,
.data-table tr:focus-within .row-actions { display: inline-flex; }
.data-table tr:hover .row-num,
.data-table tr:focus-within .row-num { display: none; }

.row-act {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  padding: 0;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
}

.row-act:hover { background: var(--color-surface-hover); color: var(--color-link); }
.row-act.row-act-danger:hover { color: var(--color-danger); }

.row-act:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 1px;
}

/* 行选择复选框 */
.row-select {
  width: 16px;
  height: 16px;
  margin-right: 6px;
  vertical-align: middle;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.row-select:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

.data-table thead th.row-number .row-select { margin-right: 0; }

/* 批量操作条 */
.batch-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  padding: 8px 12px;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
}

.batch-info {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-link);
  margin-right: 4px;
}

/* 数据质量报告 */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  margin: 14px 0 12px;
}

.quality-item {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.q-label { font-size: 12px; color: var(--color-text-muted); }

.q-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin: 2px 0;
  font-variant-numeric: tabular-nums;
}

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

.quality-item.q-warn { border-color: var(--color-warning); }
.quality-item.q-warn .q-value { color: var(--color-warning); }

/* Pagination */
.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: 12px;
  padding: 12px 0;
}

.page-info { font-size: 14px; color: var(--color-text-secondary); }

/* Progress Bar */
.progress-bar {
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  margin: 16px 0;
  position: relative;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0;
}

.progress-text {
  position: absolute;
  right: 0; top: -20px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* Data Status */
.data-status {
  display: flex; gap: 20px;
  padding: 12px 16px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  margin-top: 16px;
  font-size: 14px;
  flex-wrap: wrap;
}

.status-item { display: flex; align-items: center; gap: 6px; color: var(--color-text-secondary); }
.status-item .iconify { font-size: 18px; }

/* No Data Hint */
.no-data-hint {
  display: flex; align-items: center; gap: 10px;
  padding: 24px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  color: var(--color-link);
  font-size: 14px;
}
.no-data-hint .iconify { font-size: 24px; }

/* Tabs */
.merge-split-tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--color-border); }

.tab-btn {
  padding: 10px 20px;
  background: none; border: none;
  font-size: 14px; font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
  font-family: inherit;
}

.tab-btn:hover { color: var(--color-text); background: var(--color-primary-light); }
.tab-btn.active { color: var(--color-link); border-bottom-color: var(--color-link); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* Search Bar */
.search-bar {
  display: flex; align-items: center; gap: 8px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  margin-bottom: 16px;
}

.search-bar input {
  flex: 1; min-width: 0; border: none; outline: none;
  font-size: 15px; padding: 4px 0;
  background: transparent; color: var(--color-text);
}
.search-bar input:focus { box-shadow: none; }
.search-icon { font-size: 20px; color: var(--color-text-muted); }

/* Sort Keys (Multi-column Sort module) */
.sort-key-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.sort-key-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}
.sort-key-row select { font-size: 13px; padding: 6px 10px; flex: 1 1 auto; min-width: 90px; }
.sort-index {
  min-width: 24px; height: 24px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-primary); color: #fff;
  border-radius: 50%; font-size: 12px; font-weight: 600;
}
.remove-sort-key { color: var(--color-danger); }
.sort-content .tool-card { margin-bottom: 16px; }

@media (max-width: 600px) {
  .sort-key-row { flex-wrap: wrap; }
  .sort-key-row .sort-col,
  .sort-key-row .sort-dir,
  .sort-key-row .sort-mode,
  .sort-key-row .sort-nulls { flex: 1 1 40%; }
}

/* Filter Conditions */
.filter-condition {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.filter-condition select, .filter-condition input { font-size: 13px; padding: 6px 10px; }

.filter-condition .cond-col { min-width: 120px; }
.filter-condition .cond-op { min-width: 110px; }
.filter-condition .cond-val { width: 130px; }
.filter-condition .cond-val2 { width: 130px; }
.filter-condition .cond-range-sep { color: var(--color-text-muted, #909399); padding: 0 2px; user-select: none; }
.filter-condition input.invalid { border-color: var(--color-danger, #e74c3c); }
.filter-condition input.invalid:focus { box-shadow: 0 0 0 3px rgba(231, 76, 60, .15); }

.remove-condition {
  background: none; border: none; cursor: pointer;
  color: var(--color-danger); font-size: 18px;
  display: flex; align-items: center;
}

.filter-logic { display: flex; gap: 16px; margin-top: 8px; }
.filter-logic label { display: flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }

.filter-results-info {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 14px;
}

/* Lang Toggle / Theme Toggle */
.lang-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  font-size: 13px; font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition);
  font-family: inherit;
}
.lang-toggle:hover { background: var(--color-surface-hover); color: var(--color-text); }

/* Paste Area */
.paste-toggle { margin-top: 12px; text-align: center; }
.paste-area { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.paste-area textarea { width: 100%; font-family: var(--font-mono); font-size: 13px; }

/* File List */
.file-list { margin: 12px 0; }
.file-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
  font-size: 13px;
}
.file-item-name { display: flex; align-items: center; gap: 6px; }
.file-item-remove { background: none; border: none; cursor: pointer; color: var(--color-danger); font-size: 16px; }

/* Column List */
.column-list { display: flex; flex-direction: column; gap: 4px; max-height: 400px; overflow-y: auto; }

.column-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: grab;
  font-size: 14px;
  transition: all var(--transition);
}

.column-item:hover { border-color: var(--color-primary); }
.column-item.dragging { opacity: 0.5; border-style: dashed; }
.column-item .drag-handle { color: var(--color-text-muted); cursor: grab; font-size: 16px; }
.column-item .col-name { flex: 1; font-weight: 500; }
.column-item .col-delete { background: none; border: none; cursor: pointer; color: var(--color-danger); font-size: 16px; display: flex; }

/* Stats Summary */
.stats-summary {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: left;
}

.stat-card .stat-label { font-size: 12px; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-card .stat-value { font-size: 24px; font-weight: 700; color: var(--color-text); margin-top: 4px; line-height: 1.25; }
.stat-card .stat-detail { font-size: 12px; color: var(--color-text-secondary); margin-top: 6px; line-height: 1.4; }

/* Chart Container */
.chart-builder { margin-bottom: 24px; }
.chart-builder select,
.chart-builder input[type="text"],
.chart-builder input[type="number"] {
  min-height: 40px;
}
.chart-container {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 16px;
  text-align: center;
}
.chart-container canvas { max-height: 400px; }

/* Output Actions */
.output-actions { display: flex; gap: 8px; margin-top: 12px; }

/* Clean Summary */
.clean-summary {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  background: var(--success-bg, #ECFDF5);
  border: 1px solid var(--success-border, #A7F3D0);
  border-radius: var(--radius-sm);
  color: var(--success-text, #065F46);
  margin-top: 16px;
  font-size: 14px;
}

:root[data-theme="dark"] .clean-summary {
  --success-bg: rgba(16,185,129,0.12);
  --success-border: #065F46;
  --success-text: #6EE7B7;
}

.clean-summary .iconify { font-size: 20px; color: var(--color-success); }

.clean-export { margin-top: 16px; }

/* Convert Layout */
.convert-layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: start;
}

.convert-panel h3 { font-size: 16px; font-weight: 600; margin-bottom: 12px; }
.convert-actions { display: flex; flex-direction: column; align-items: center; gap: 12px; padding-top: 60px; }
.convert-arrow { font-size: 24px; color: var(--color-text-muted); }
.format-selector { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; font-size: 14px; }

/* Convert JSON options */
.convert-options { display: flex; flex-wrap: wrap; gap: 12px 20px; margin-bottom: 12px; font-size: 14px; }
.convert-options label { display: flex; align-items: center; gap: 6px; cursor: pointer; }

/* Dedup Checkboxes */
.dedup-check-list {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  max-height: 200px;
  overflow-y: auto;
}

.dedup-check {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
}
.dedup-check:hover { border-color: var(--color-primary); }
.dedup-check input { accent-color: var(--color-primary); cursor: pointer; }

/* Parse Options (collapsible) */
.parse-options { margin-top: 16px; }
.parse-options-toggle { display: inline-flex; align-items: center; gap: 6px; }
.parse-options-body {
  margin-top: 12px;
  padding: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

/* Parse Export Bar */
.parse-export-bar {
  display: flex; align-items: center; gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
  padding: 10px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}
.parse-export-label { font-size: 13px; font-weight: 500; color: var(--color-text-secondary); }
.parse-export-spacer { flex: 1; }
.parse-export-scope {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-link);
  background: var(--color-primary-light);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

/* Highlight */
.highlight {
  background: var(--hl-bg, #FEF08A);
  color: var(--hl-text, #713F12);
  border-radius: 2px;
  padding: 0 1px;
}

:root[data-theme="dark"] .highlight {
  --hl-bg: rgba(250,204,21,0.35);
  --hl-text: #FDE68A;
}

/* Modal */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  padding: 16px;
  animation: fadeIn 0.2s ease;
}

/* 防止 display:flex 覆盖 HTML 上的 hidden 属性，确保弹窗默认隐藏、由 JS 通过 hidden 开启 */
.modal-overlay[hidden],
.modal-overlay[hidden] .modal-content {
  display: none !important;
}

.modal-content {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow-lg);
  animation: modalIn var(--transition-slow);
}

@keyframes modalIn { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: none; } }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
}
.modal-header h3 { font-size: 16px; font-weight: 600; }

.modal-close {
  background: none; border: none; cursor: pointer;
  font-size: 20px; color: var(--color-text-muted);
  display: flex; align-items: center; width: 32px; height: 32px;
  justify-content: center; border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.modal-close:hover { background: var(--color-surface-hover); color: var(--color-text); }

.modal-body { padding: 20px; display: flex; flex-direction: column; gap: 16px; }

.theme-radio-group { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }
.theme-radio-group label {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  transition: all var(--transition);
}
.theme-radio-group label:hover { border-color: var(--color-primary); }
.theme-radio-group input { accent-color: var(--color-primary); cursor: pointer; }

@media (max-width: 768px) {
  .convert-layout { grid-template-columns: 1fr; }
  .convert-actions { flex-direction: row; padding-top: 0; justify-content: center; }
  .convert-arrow { transform: rotate(90deg); }
  .form-row { flex-direction: column; align-items: stretch; }
  .filter-condition { flex-direction: column; align-items: stretch; }
  .stats-summary { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .stats-summary { grid-template-columns: 1fr; }
}


/* ===== Accessibility: unified focus ring ===== */
button:focus-visible,
a:focus-visible,
.upload-zone:focus-visible,
.column-item:focus-visible,
[role="button"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Unified disabled state across all button kinds ===== */
.icon-btn:disabled { opacity: 0.45; cursor: not-allowed; pointer-events: none; }
.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== Quick Bar (parse module global actions) ===== */
.quick-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}
/* 小屏：紧凑布局，按钮 2 个/行 */
@media (max-width: 600px) {
  .quick-bar { padding: 8px 10px; gap: 6px; }
  .quick-bar .btn-sm { padding: 5px 10px; font-size: 12px; }
  .quick-bar-label { width: 100%; margin-bottom: 2px; }
  .quick-bar-state { font-size: 11px; }
}

.quick-bar-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-right: 4px;
}

/* 全局快捷栏：位于模块内容之上，所有模块共用 */
.global-quick-bar { margin: 0 0 16px; }
.quick-bar-spacer { flex: 1 1 auto; min-width: 8px; }
.quick-bar-state {
  font-size: 12px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ===== Upload zone interaction polish ===== */
.upload-icon { transition: transform var(--transition), color var(--transition); }
.upload-zone.dragover .upload-icon { transform: scale(1.08); color: var(--color-link); }

/* ===== Stat card hover feel ===== */
.stat-card { transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition); }
.stat-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
  transform: translateY(-1px);
}

/* ===== Custom export modal ===== */
.export-form-row { align-items: flex-end; margin-bottom: 0; }
.export-form-row .form-group { flex: 1; min-width: 120px; }
#customExportModal input[type="number"] { width: 100%; }

/* ===== Table zebra striping & row highlight (v2 polish) ===== */
.data-table tbody tr:nth-child(even) td {
  background: var(--color-surface);
}
.data-table tbody tr:hover td {
  background: var(--color-surface-hover);
}
.data-table tbody tr:nth-child(even):hover td {
  background: var(--color-surface-hover);
}

/* ===== Sortable headers with direction arrow ===== */
.data-table th.th-sortable {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 22px;
  transition: background-color var(--transition);
}
.data-table th.th-sortable:hover { background: var(--color-surface-hover); }
.data-table th.th-sort-asc, .data-table th.th-sort-desc {
  color: var(--color-link);
  background: var(--color-primary-light);
}
.data-table th.th-sort-asc::after {
  content: "\25B4"; /* small up triangle */
  position: absolute; right: 8px; top: 50%;
  transform: translateY(-50%);
  font-size: 12px; color: var(--color-link);
}
.data-table th.th-sort-desc::after {
  content: "\25BE"; /* small down triangle */
  position: absolute; right: 8px; top: 50%;
  transform: translateY(-50%);
  font-size: 12px; color: var(--color-link);
}

/* ===== Pagination jump control ===== */
.pagination .page-jump {
  width: 62px;
  padding: 4px 6px;
  font-size: 13px;
  text-align: center;
  appearance: textfield;
  -moz-appearance: textfield;
}
.pagination .page-jump::-webkit-outer-spin-button,
.pagination .page-jump::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.pagination .page-jump:focus { box-shadow: var(--shadow-focus); }
.page-range {
  font-size: 13px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ===== File list empty state & item polish ===== */
.file-list-empty {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 20px;
  color: var(--color-text-muted);
  font-size: 13px;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
}
.file-item { transition: border-color var(--transition), background-color var(--transition); }
.file-item:hover { background: var(--color-surface-hover); }

/* ===== Button press feedback ===== */
.btn { transition: all var(--transition), transform 80ms ease; }
.btn:active:not(:disabled) { transform: translateY(1px); }

/* ===== Tool card subtle lift on hover ===== */
.tool-card { transition: background-color var(--transition-slow), border-color var(--transition-slow), box-shadow var(--transition); }
.tool-card:hover { border-color: var(--color-border-focus); }
/* hover 阴影由 modules.css（后加载）统一提供亮/暗两档，勿在此重复定义避免被覆盖 */

/* ===== Status numbers emphasis ===== */
.status-item .status-num-value { font-weight: 700; color: var(--color-text); font-variant-numeric: tabular-nums; }

/* ===== Filter condition animation ===== */
.filter-condition { animation: fadeIn 0.15s ease; }

/* ===== Modal max height scroll ===== */
.modal-body { max-height: 70vh; overflow-y: auto; }

/* ===== Touch devices: row action buttons hidden by :hover would be unreachable ===== */
@media (hover: none) {
  .data-table .row-actions { display: inline-flex; }
  .row-number .row-num { display: none; }
  td.row-number, th.row-number { min-width: 96px; }
}

/* ===== Respect reduced motion preference ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== Keyboard shortcuts help modal ===== */
.shortcut-table { width: 100%; border-collapse: collapse; }
.shortcut-table td { padding: 9px 10px; border-bottom: 1px solid var(--color-border); font-size: 14px; color: var(--color-text); }
.shortcut-table tr:last-child td { border-bottom: none; }
.shortcut-table td:first-child { white-space: nowrap; width: 40%; }
.shortcut-table kbd {
  display: inline-block; min-width: 24px; text-align: center;
  padding: 2px 8px; margin: 0 1px;
  border: 1px solid var(--color-border); border-bottom-width: 2px;
  border-radius: var(--radius-sm); background: var(--color-bg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px; color: var(--color-text);
}

/* ===== Keyboard focus visibility (a11y) ===== */
.modal-close:focus-visible,
.btn:focus-visible,
.icon-btn:focus-visible,
.nav-item:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}


/* ===== 预览搜索过滤条 ===== */
.table-search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  margin-bottom: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast) var(--ease);
}
.table-search-bar:focus-within {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}
.table-search-bar .iconify {
  color: var(--color-text-muted);
  font-size: 18px;
  flex: 0 0 auto;
}
.table-search-bar input[type="search"] {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 14px;
  transition: border-color var(--transition-fast) var(--ease), box-shadow var(--transition-fast) var(--ease);
}
.table-search-bar input[type="search"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}
.search-matches {
  font-size: 13px;
  color: var(--color-text-secondary);
  white-space: nowrap;
  flex: 0 0 auto;
}
mark.match-highlight {
  background: rgba(250, 204, 21, 0.45);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
}
.data-table td.search-empty-tip {
  text-align: center;
  color: var(--color-text-muted);
  padding: 28px 12px;
}

/* ===== 全局键盘可访问焦点环（不干扰显式风格） ===== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}


/* ===== Pivot 透视表模块 ===== */
.pivot-total-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 2px 0 12px;
  font-size: 13px;
  color: var(--color-text-secondary);
  cursor: pointer;
}
.pivot-total-toggle input { width: auto; }

.pivot-table th.pivot-key-col,
.pivot-table td.pivot-key-col {
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  position: sticky;
  left: 0;
  background: var(--color-surface, var(--color-bg));
  z-index: 1;
}
.pivot-table th.pivot-key-col { z-index: 2; }
.pivot-table .pivot-num { text-align: right; font-variant-numeric: tabular-nums; }
.pivot-table th.pivot-total-cell,
.pivot-table td.pivot-total-cell {
  font-weight: 700;
  background: rgba(127, 127, 127, 0.08);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.pivot-table th.pivot-total-cell { text-align: center; }

/* 数据对比：交换方向按钮激活态 */
.btn.swap-active {
  border-color: var(--btn-primary-bg, #4f7cff);
  color: var(--btn-primary-bg, #4f7cff);
  background: var(--btn-primary-bg-soft, rgba(79, 124, 255, 0.10));
}

/* ============================================================
   UI 增强：统一键盘焦点可见态（可访问性）
   ============================================================ */
.btn:focus-visible,
a:focus-visible,
button:focus-visible,
.nav-item:focus-visible,
.upload-zone:focus-visible,
.tool-card a:focus-visible,
.site-nav a:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* ============================================================
   移动端表格增强：横向滚动体验、冻结列分隔、触摸目标
   ============================================================ */
@media (max-width: 768px) {
  .table-wrapper {
    overscroll-behavior-x: contain;
    scrollbar-width: thin;
  }
  .data-table th,
  .data-table td {
    padding: 8px 10px;
    max-width: 170px;
  }
  .data-table thead th {
    background: var(--color-surface-hover);
  }
  .data-table th.row-number,
  .data-table td.row-number {
    border-right: 1px solid var(--color-border);
  }
  .row-select {
    width: 18px;
    height: 18px;
  }
}

/* ============================================================
   v1.0.35 一致性补全（低风险视觉：不改布局，仅统一控件态与空状态引导感）
   ============================================================ */
/* 全局复选 / 单选统一主题色（此前仅部分控件单独设置 accent-color） */
input[type="checkbox"],
input[type="radio"] {
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* 表单控件禁用态统一（按钮禁用态此前已统一） */
select:disabled,
input:disabled,
textarea:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--color-surface);
}

/* 次要按钮禁用态：保留边框轮廓，避免纯透明度看不清类型 */
.btn-secondary:disabled,
.btn-secondary[disabled] {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

/* 空状态提示增加虚线引导边框，弱化与普通面板的混同 */
.no-data-hint {
  border: 1px dashed var(--color-border-focus);
}