* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100vh;
  font-family: Tahoma, Verdana, sans-serif;
  font-size: 11px;
}

/* ==== App-specific ribbon overrides ==== */
.rb-font-family {
  width: 120px;
}

.rb-font-size {
  width: 52px;
}

.rb-numfmt-select {
  width: 120px;
}

.rb-font-group {
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

/* ==== Color button ==== */
.rb-color-btn {
  position: relative;
  padding-bottom: 5px !important;
}

.rb-color-btn .rb-color-ind {
  position: absolute;
  bottom: 1px;
  left: 3px;
  right: 3px;
  height: 3px;
}

/* ==== Formula bar ==== */
.formula-bar {
  display: flex;
  align-items: center;
  padding: 2px 4px;
  background: var(--sz-color-button-face);
  border-bottom: 1px solid var(--sz-color-button-shadow);
  flex-shrink: 0;
  gap: 4px;
}

.cell-ref {
  width: 72px;
  padding: 1px 4px;
  background: var(--sz-color-window);
  font-size: 11px;
  font-family: inherit;
  text-align: center;
  flex-shrink: 0;
  border: 1px solid var(--sz-color-button-shadow);
}

.formula-separator {
  width: 1px;
  height: 18px;
  background: var(--sz-color-button-shadow);
  flex-shrink: 0;
}

.formula-fx {
  border: 1px solid transparent;
  background: transparent;
  cursor: default;
  font-size: 11px;
  padding: 1px 4px;
  color: var(--sz-color-button-text);
  flex-shrink: 0;
}

.formula-fx:hover {
  border-color: var(--sz-color-button-shadow);
  background: var(--sz-color-button-light);
}

.formula-input {
  flex: 1;
  padding: 1px 4px;
  background: var(--sz-color-window);
  font-size: 11px;
  font-family: inherit;
  outline: none;
  border: 1px solid var(--sz-color-button-shadow);
}

/* ==== Formula autocomplete ==== */
.formula-autocomplete {
  position: absolute;
  z-index: 1000;
  background: var(--sz-color-window, #fff);
  border: 1px solid var(--sz-color-button-shadow, #999);
  box-shadow: 0 2px 8px rgba(0,0,0,.18);
  max-height: 200px;
  overflow-y: auto;
  font-size: 11px;
  min-width: 240px;
}
.formula-ac-item {
  padding: 4px 8px;
  cursor: default;
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.formula-ac-item:hover, .formula-ac-item.active {
  background: var(--sz-color-highlight, #0078d4);
  color: var(--sz-color-highlight-text, #fff);
}
.formula-ac-name { font-weight: bold; white-space: nowrap; }
.formula-ac-desc { opacity: .7; font-size: 10px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ==== Grid container ==== */
.grid-container {
  flex: 1;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.grid-scroll {
  flex: 1;
  overflow: auto;
  position: relative;
}

.grid-table {
  border-collapse: collapse;
  table-layout: fixed;
}

/* ==== Column headers ==== */
.grid-table thead {
  position: sticky;
  top: 0;
  z-index: 3;
}

.grid-table thead th {
  background: var(--sz-color-button-face);
  border: 1px solid var(--sz-color-button-shadow);
  border-top: none;
  padding: 2px 4px;
  font-weight: normal;
  font-size: 11px;
  text-align: center;
  color: var(--sz-color-button-text);
  user-select: none;
  cursor: default;
  position: relative;
  min-width: 64px;
  height: 20px;
  white-space: nowrap;
  overflow: hidden;
}

.grid-table thead th.corner {
  min-width: 40px;
  width: 40px;
  position: sticky;
  left: 0;
  z-index: 4;
}

.grid-table thead th.col-header {
  min-width: 64px;
}

.grid-table thead th.col-header.selected {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}

.grid-table thead th.col-header.hidden-col {
  width: 4px !important;
  min-width: 4px !important;
  max-width: 4px !important;
  padding: 0;
  overflow: hidden;
  font-size: 0;
}

.grid-table thead th.col-header.filtered::after {
  content: '\25BC';
  font-size: 8px;
  position: absolute;
  right: 2px;
  top: 4px;
  color: var(--sz-color-highlight);
}

.col-resize-handle {
  position: absolute;
  right: -2px;
  top: 0;
  width: 5px;
  height: 100%;
  cursor: col-resize;
  z-index: 5;
}

/* ==== Row headers ==== */
.grid-table tbody td.row-header {
  background: var(--sz-color-button-face);
  border: 1px solid var(--sz-color-button-shadow);
  border-left: none;
  padding: 2px 4px;
  font-size: 11px;
  text-align: center;
  color: var(--sz-color-button-text);
  user-select: none;
  cursor: default;
  position: sticky;
  left: 0;
  z-index: 2;
  width: 40px;
  min-width: 40px;
  white-space: nowrap;
}

.grid-table tbody td.row-header.selected {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}

.grid-table tbody tr.hidden-row {
  display: none;
}

.row-resize-handle {
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 4px;
  cursor: row-resize;
  z-index: 5;
}

/* ==== Data cells ==== */
.grid-table tbody td.cell {
  border: 1px solid var(--sz-color-button-shadow);
  padding: 1px 3px;
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  background: var(--sz-color-window);
  color: var(--sz-color-window-text);
  cursor: cell;
  height: 20px;
  max-height: 20px;
  position: relative;
  user-select: none;
}

.grid-table tbody td.cell.wrap-text {
  white-space: pre-wrap;
  word-break: break-all;
  max-height: none;
}

.grid-table tbody td.cell.selected {
  outline: 2px solid var(--sz-color-highlight);
  outline-offset: -1px;
  z-index: 1;
}

.grid-table tbody td.cell.in-range {
  background: rgba(51, 102, 255, 0.12);
}

.grid-table tbody td.cell.editing {
  outline: 2px solid var(--sz-color-highlight);
  outline-offset: -1px;
  padding: 0;
  overflow: visible;
  z-index: 1;
}

.grid-table tbody td.cell.error {
  color: #c00;
}

.grid-table tbody td.cell.merged-hidden {
  display: none;
}

.grid-table tbody td.cell.has-comment::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-top: 6px solid #f00;
}

.grid-table tbody td.cell.has-hyperlink {
  color: var(--sz-color-hot-tracking);
  text-decoration: underline;
  cursor: pointer;
}

/* Fill handle */
.fill-handle {
  position: absolute;
  bottom: -3px;
  right: -3px;
  width: 6px;
  height: 6px;
  background: var(--sz-color-highlight);
  cursor: crosshair;
  z-index: 10;
}

.grid-table tbody td.cell.hidden-col-cell {
  width: 4px !important;
  min-width: 4px !important;
  max-width: 4px !important;
  padding: 0;
  overflow: hidden;
  font-size: 0;
}

/* Freeze pane lines */
.freeze-line-col {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--sz-color-button-dark-shadow);
  z-index: 6;
  pointer-events: none;
}

.freeze-line-row {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--sz-color-button-dark-shadow);
  z-index: 6;
  pointer-events: none;
}

.cell-editor {
  position: absolute;
  top: -1px;
  left: -1px;
  width: calc(100% + 2px);
  min-width: 100%;
  height: calc(100% + 2px);
  border: none;
  outline: none;
  font-size: 11px;
  font-family: inherit;
  padding: 1px 3px;
  background: var(--sz-color-window);
  z-index: 10;
}

/* ==== Bottom bar (sheet tabs + status) ==== */
.bottom-bar {
  display: flex;
  align-items: stretch;
  background: var(--sz-color-button-face);
  border-top: 1px solid var(--sz-color-button-shadow);
  flex-shrink: 0;
  min-height: 24px;
}

.sheet-tabs {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0 2px;
  overflow-x: auto;
  overflow-y: hidden;
  flex-shrink: 0;
  min-width: 180px;
  max-width: 50%;
  border-right: 1px solid var(--sz-color-button-shadow);
}

.sheet-tab {
  padding: 3px 12px;
  cursor: default;
  font-size: 11px;
  color: var(--sz-color-button-text);
  background: var(--sz-color-button-face);
  border: 1px solid var(--sz-color-button-shadow);
  border-bottom: none;
  white-space: nowrap;
  position: relative;
}

.sheet-tab.active {
  background: var(--sz-color-window);
  font-weight: bold;
  border-bottom: 1px solid var(--sz-color-window);
  margin-bottom: -1px;
}

.sheet-tab:hover:not(.active) {
  background: var(--sz-color-button-light);
}

.sheet-tab .tab-color-bar {
  position: absolute;
  bottom: 0;
  left: 1px;
  right: 1px;
  height: 3px;
}

.sheet-nav-btn {
  min-width: 20px;
  height: 20px;
  border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-button-face);
  cursor: default;
  font-size: 13px;
  color: var(--sz-color-button-text);
  margin-right: 4px;
  flex-shrink: 0;
}

.sheet-nav-btn:hover {
  background: var(--sz-color-button-light);
}

/* ==== Status bar ==== */
.status-bar {
  display: flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--sz-color-button-text);
  flex: 1;
  gap: 16px;
}

.status-bar .status-section {
  white-space: nowrap;
}

.status-spacer {
  flex: 1;
}

/* ==== App-specific dialog overrides ==== */
.dialog {
  max-width: 500px;
}

.dialog-body label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 4px;
}

.dialog-body select {
  padding: 2px 4px;
  font-size: 11px;
  font-family: inherit;
}

/* ==== Format Cells tabs ==== */
.fc-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--sz-color-button-shadow);
}

.fc-tab {
  padding: 3px 10px;
  cursor: default;
  font-size: 11px;
  border: 1px solid transparent;
  border-bottom: none;
  margin-bottom: -1px;
}

.fc-tab:hover {
  background: var(--sz-color-button-light);
}

.fc-tab.active {
  background: var(--sz-color-button-face);
  border-color: var(--sz-color-button-shadow);
  border-bottom: 1px solid var(--sz-color-button-face);
  font-weight: bold;
}

.fc-panel {
  display: none;
}

.fc-panel.active {
  display: block;
}

/* Format Cells sample preview */
.fc-sample-preview {
  border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-window, #fff);
  padding: 6px 10px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
}

.fc-sample-label {
  font-size: 10px;
  color: var(--sz-color-gray-text, #888);
  min-width: 42px;
}

.fc-sample-value {
  font-size: 13px;
  font-weight: bold;
  color: var(--sz-color-window-text, #000);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Custom format code chips */
.fc-custom-code-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 4px 0 6px;
}

.fc-code-chip {
  font-size: 10px;
  font-family: Consolas, monospace;
  padding: 2px 6px;
  border: 1px solid var(--sz-color-button-shadow, #999);
  background: var(--sz-color-button-face, #f0f0f0);
  cursor: default;
  border-radius: 2px;
  user-select: none;
}

.fc-code-chip:hover {
  background: var(--sz-color-highlight, #0078d4);
  color: var(--sz-color-highlight-text, #fff);
  border-color: var(--sz-color-highlight, #0078d4);
}

/* Font preview box */
.fc-font-preview-box {
  border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-window, #fff);
  padding: 12px;
  margin-top: 8px;
  text-align: center;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ==== Find panel ==== */
.find-panel {
  display: none;
  position: fixed;
  top: 120px;
  right: 4px;
  z-index: 4000;
  background: var(--sz-color-button-face);
  border: 2px outset var(--sz-color-button-highlight);
  box-shadow: 2px 2px 6px rgba(0,0,0,0.25);
  min-width: 320px;
  font-size: 11px;
}

.find-panel.visible {
  display: block;
}

.find-panel-title {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
  padding: 3px 8px;
  font-weight: bold;
  font-size: 11px;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.find-panel-title .fp-close {
  cursor: default;
  padding: 0 4px;
  font-size: 13px;
  line-height: 1;
}

.find-panel-title .fp-close:hover {
  background: rgba(255,255,255,0.2);
}

.find-panel-body {
  padding: 8px;
}

.fp-field {
  display: flex;
  align-items: center;
  margin-bottom: 6px;
  gap: 6px;
}

.fp-field label {
  min-width: 60px;
  text-align: right;
  font-size: 11px;
}

.fp-field input[type="text"],
.fp-field select {
  flex: 1;
  padding: 2px 4px;
  font-size: 11px;
  font-family: inherit;
}

.fp-buttons {
  display: flex;
  gap: 4px;
  justify-content: flex-end;
  margin-top: 4px;
}

.fp-buttons button {
  min-width: 72px;
  padding: 3px 8px;
  font-size: 11px;
  cursor: default;
}

.fp-status {
  font-size: 10px;
  color: var(--sz-color-gray-text);
  margin-top: 4px;
  min-height: 14px;
}

/* ==== Color palette popup ==== */
.color-palette {
  display: none;
  position: absolute;
  z-index: 4500;
  background: var(--sz-color-button-face);
  border: 2px outset var(--sz-color-button-highlight);
  padding: 4px;
  box-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.color-palette.visible {
  display: grid;
  grid-template-columns: repeat(8, 16px);
  gap: 2px;
}

.color-swatch {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 1px solid var(--sz-color-button-shadow);
  cursor: default;
  vertical-align: middle;
}

.color-swatch:hover {
  border-color: var(--sz-color-window-text);
  outline: 1px solid var(--sz-color-window);
}

.fp-field .color-swatch {
  width: 20px;
  height: 20px;
}

/* ==== Cell styles grid ==== */
.cell-styles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.cell-style-item {
  padding: 6px 10px;
  border: 1px solid var(--sz-color-button-shadow);
  cursor: default;
  text-align: center;
  font-size: 11px;
}

.cell-style-item:hover {
  border-color: var(--sz-color-highlight);
  background: var(--sz-color-button-light);
}

/* ==== Data bars (conditional formatting) ==== */
.cf-data-bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  opacity: 0.3;
  z-index: 0;
  pointer-events: none;
}

/* ==== Icon sets (conditional formatting) ==== */
.grid-table tbody td.cell[data-cf-icon]::before {
  content: attr(data-cf-icon);
  margin-right: 4px;
}

/* ==== Table styles grid ==== */
.table-styles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.table-style-item {
  border: 1px solid var(--sz-color-button-shadow);
  cursor: default;
  font-size: 10px;
  overflow: hidden;
}

.table-style-item:hover {
  border-color: var(--sz-color-highlight);
  box-shadow: 0 0 3px rgba(0,0,0,0.2);
}

.table-style-item .ts-header,
.table-style-item .ts-band {
  padding: 2px 6px;
  border-bottom: 1px solid rgba(0,0,0,0.1);
}

.table-style-item .ts-name {
  padding: 3px 6px;
  text-align: center;
  background: var(--sz-color-button-face);
  font-size: 9px;
}

/* ==== Name Manager table ==== */
.nm-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.nm-table th {
  background: var(--sz-color-button-face);
  border: 1px solid var(--sz-color-button-shadow);
  padding: 3px 6px;
  font-weight: bold;
  text-align: left;
  font-size: 10px;
  white-space: nowrap;
  position: sticky;
  top: 0;
}

.nm-table td {
  border: 1px solid var(--sz-color-button-shadow);
  padding: 2px 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}

.nm-table tr:hover td {
  background: var(--sz-color-button-light);
}

/* ==== Data Validation Dropdown ==== */
.val-dropdown-arrow {
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 8px;
  color: var(--sz-color-button-shadow);
  cursor: default;
  padding: 0 2px;
  line-height: 1;
}

.val-dropdown-arrow:hover {
  color: var(--sz-color-highlight);
}

.val-dropdown-list {
  background: var(--sz-color-window);
  border: 1px solid var(--sz-color-button-shadow);
  box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.2);
  max-height: 200px;
  overflow-y: auto;
}

.val-dropdown-item {
  padding: 3px 8px;
  font-size: 11px;
  cursor: default;
  color: var(--sz-color-window-text);
  user-select: none;
}

.val-dropdown-item:hover {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}

/* ==== Pivot Table dialog ==== */
.pivot-zone {
  background: var(--sz-color-window);
}

.pf-btn {
  border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-button-face);
  color: var(--sz-color-button-text);
  cursor: default;
  font-family: inherit;
}

.pf-btn:hover {
  background: var(--sz-color-button-light);
  border-color: var(--sz-color-highlight);
}

.pf-agg {
  border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-window);
  color: var(--sz-color-window-text);
  font-family: inherit;
}

/* ==== Inline Charts ==== */
.inline-chart {
  border-radius: 4px;
  overflow: hidden;
}

.inline-chart canvas {
  display: block;
}

/* ==== Sparklines ==== */
.sparkline-canvas {
  pointer-events: none;
}

/* ==== Print styles ==== */
@media print {
  .qat,
  .ribbon-tabs,
  .ribbon-panel,
  .backstage,
  .formula-bar,
  .bottom-bar,
  .find-panel,
  .color-palette,
  .dialog-overlay {
    display: none !important;
  }

  .grid-container {
    overflow: visible;
  }

  .grid-scroll {
    overflow: visible;
  }
}

/* ── Print Layout / Page Breaks ─────────────────────────────── */
.page-break-h {
  border-top: 2px dashed #2266cc !important;
}
.page-break-v {
  border-left: 2px dashed #2266cc !important;
}
.outside-print-area {
  background-color: rgba(128, 128, 128, 0.15) !important;
  color: rgba(0, 0, 0, 0.4) !important;
}
.page-break-preview .outside-print-area {
  background-color: rgba(128, 128, 128, 0.25) !important;
}

@media print {
  .page-break-h { page-break-before: always; }
  .outside-print-area { display: none; }
  .page-break-v, .page-break-h { border: none !important; }
}

/* ── Protection indicator ────────────────────────────────────── */
.cell-locked-indicator {
  position: absolute;
  top: 1px;
  right: 1px;
  font-size: 7px;
  color: var(--sz-color-gray-text);
  opacity: 0.5;
}

/* ── Format Painter cursor ──────────────────────────────────── */
.format-painter-active {
  cursor: crosshair !important;
}
.format-painter-active td {
  cursor: crosshair !important;
}

/* ── Conditional Formatting Manage Rules ──────────────────── */
.cf-rule-row { display: flex; align-items: center; padding: 6px 8px; border-bottom: 1px solid #e0e0e0; cursor: pointer; }
.cf-rule-row.selected { background: #cce5ff; }
.cf-rule-row .cf-rule-preview { width: 40px; height: 20px; border: 1px solid #ccc; margin-right: 8px; flex-shrink: 0; }
.cf-rule-row .cf-rule-info { flex: 1; font-size: 11px; }
.cf-rule-row .cf-rule-stop { font-size: 10px; margin-left: 8px; }

/* ── Outline / Group gutter ──────────────────────────────── */
.outline-gutter { position: sticky; left: 0; z-index: 5; background: #f0f0f0; }
.outline-btn { width: 14px; height: 14px; border: 1px solid #aaa; background: #fff; font-size: 9px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; padding: 0; line-height: 1; }
.outline-btn:hover { background: #e0e0e0; }
.outline-level-btn { width: 14px; height: 14px; border: 1px solid #aaa; background: #f8f8f8; font-size: 9px; cursor: pointer; text-align: center; margin: 1px; display: inline-flex; align-items: center; justify-content: center; padding: 0; }

/* ── Trace Arrows SVG overlay ────────────────────────────── */
.trace-arrow-overlay { position: absolute; top: 0; left: 0; pointer-events: none; z-index: 100; overflow: visible; }
.trace-arrow-overlay line { stroke: #0066cc; stroke-width: 1.5; }
.trace-arrow-overlay marker path { fill: #0066cc; }
.trace-arrow-overlay circle { fill: #0066cc; r: 3; }

/* ── Text to Columns preview ─────────────────────────────── */
.ttc-preview { margin-top: 8px; border: 1px solid #ccc; padding: 4px; max-height: 150px; overflow: auto; font-family: monospace; font-size: 11px; white-space: pre; background: var(--sz-color-window); }
.ttc-fixed-break { position: absolute; top: 0; bottom: 0; width: 1px; background: red; pointer-events: none; }

/* ── Advanced Sort level rows ────────────────────────────── */
.as-level-row { display: flex; align-items: center; gap: 6px; margin-bottom: 4px; padding: 4px; border: 1px solid var(--sz-color-button-shadow); background: var(--sz-color-window); }
.as-level-row.selected { outline: 2px solid var(--sz-color-highlight); }
.as-level-row select { font-size: 11px; font-family: inherit; padding: 1px 4px; }

/* ── Error Checking panel ────────────────────────────────── */
.error-panel { position: fixed; top: 120px; right: 4px; z-index: 4000; background: var(--sz-color-button-face); border: 2px outset var(--sz-color-button-highlight); box-shadow: 2px 2px 6px rgba(0,0,0,0.25); min-width: 280px; max-width: 360px; font-size: 11px; display: none; }
.error-panel.visible { display: block; }
.error-panel-title { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); padding: 3px 8px; font-weight: bold; font-size: 11px; user-select: none; display: flex; justify-content: space-between; align-items: center; }
.error-panel-body { padding: 8px; max-height: 250px; overflow-y: auto; }
.error-item { padding: 3px 4px; cursor: pointer; }
.error-item:hover { background: var(--sz-color-button-light); }

/* ── Evaluate Formula dialog ─────────────────────────────── */
.eval-step { font-family: monospace; font-size: 11px; padding: 2px 0; border-bottom: 1px dotted #ddd; }
.eval-step-result { color: #006600; font-weight: bold; }

/* ── Sheet Tab Context Menu ─────────────────────────────── */
.sheet-context-menu {
  position: fixed;
  background: var(--sz-color-menu);
  border: 1px solid var(--sz-color-button-shadow);
  box-shadow: 2px 2px 5px rgba(0,0,0,0.15);
  z-index: 5000;
  min-width: 150px;
  padding: 4px 0;
}
.sheet-ctx-item {
  padding: 4px 16px;
  cursor: pointer;
  font-size: 11px;
  color: var(--sz-color-menu-text);
}
.sheet-ctx-item:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
.sheet-ctx-sep { border-top: 1px solid var(--sz-color-button-shadow); margin: 2px 0; }

/* ── Page Setup tabs ────────────────────────────────────── */
.ps-tabs { display: flex; border-bottom: 1px solid var(--sz-color-button-shadow); margin-bottom: 8px; }
.ps-tab { padding: 6px 12px; border: 1px solid transparent; background: none; cursor: pointer; font-size: 11px; font-family: inherit; color: var(--sz-color-button-text); }
.ps-tab.active { border: 1px solid var(--sz-color-button-shadow); border-bottom: 1px solid var(--sz-color-button-face); margin-bottom: -1px; background: var(--sz-color-button-face); }
.ps-tab:hover:not(.active) { background: var(--sz-color-button-light); }
.ps-panel { display: none; }
.ps-panel.active { display: block; }

/* ── Freeze pane dropdown ───────────────────────────────── */
.rb-dropdown { position: relative; display: inline-block; }
.rb-dropdown-menu { display: none; position: absolute; top: 100%; left: 0; z-index: 4000; background: var(--sz-color-menu); border: 1px solid var(--sz-color-button-shadow); box-shadow: 2px 2px 4px rgba(0,0,0,0.15); min-width: 160px; padding: 4px 0; }
.rb-dropdown:hover .rb-dropdown-menu { display: block; }
.rb-dropdown-menu button { display: block; width: 100%; text-align: left; padding: 4px 12px; border: none; background: none; font-size: 11px; font-family: inherit; cursor: pointer; color: var(--sz-color-menu-text); }
.rb-dropdown-menu button:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
.rb-dropdown-menu hr { border: none; border-top: 1px solid var(--sz-color-button-shadow); margin: 2px 0; }

/* ── Template buttons ───────────────────────────────────── */
.template-btn { padding: 8px 16px; border: 1px solid var(--sz-color-button-shadow); background: var(--sz-color-button-face); cursor: pointer; font-size: 11px; font-family: inherit; }
.template-btn:hover { background: var(--sz-color-button-light); border-color: var(--sz-color-highlight); }

/* ── Theme grid ─────────────────────────────────────────── */
.theme-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.theme-item { padding: 10px; border: 2px solid var(--sz-color-button-shadow); cursor: pointer; text-align: center; font-size: 11px; }
.theme-item:hover { border-color: var(--sz-color-highlight); }
.theme-item.active { border-color: var(--sz-color-highlight); background: var(--sz-color-button-light); }
.theme-colors { display: flex; gap: 2px; justify-content: center; margin-bottom: 4px; }
.theme-swatch { width: 16px; height: 16px; border: 1px solid rgba(0,0,0,0.2); }

/* ── Status bar context menu ────────────────────────────── */
.statusbar-context-menu {
  position: fixed;
  background: var(--sz-color-menu);
  border: 1px solid var(--sz-color-button-shadow);
  box-shadow: 2px 2px 5px rgba(0,0,0,0.15);
  z-index: 5000;
  min-width: 160px;
  padding: 4px 0;
}
.statusbar-ctx-item {
  padding: 4px 16px;
  cursor: pointer;
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--sz-color-menu-text);
}
.statusbar-ctx-item:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }

/* ── Slicer panels ──────────────────────────────────────── */
.slicer-panel {
  position: fixed;
  z-index: 4500;
  background: var(--sz-color-button-face);
  border: 2px outset var(--sz-color-button-highlight);
  box-shadow: 2px 2px 6px rgba(0,0,0,0.25);
  min-width: 160px;
  max-width: 200px;
  font-size: 11px;
}

.slicer-panel-title {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
  padding: 3px 8px;
  font-weight: bold;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: move;
}

.slicer-panel-title .slicer-close {
  cursor: default;
  padding: 0 4px;
  font-size: 13px;
  line-height: 1;
}

.slicer-panel-title .slicer-close:hover {
  background: rgba(255,255,255,0.2);
}

.slicer-panel-body {
  padding: 4px;
  max-height: 200px;
  overflow-y: auto;
}

.slicer-panel-body label {
  display: block;
  padding: 2px 4px;
  cursor: pointer;
  font-size: 11px;
}

.slicer-panel-body label:hover {
  background: var(--sz-color-button-light);
}

.slicer-panel-body label.slicer-item-deselected {
  opacity: 0.5;
  text-decoration: line-through;
}

.slicer-clear-btn {
  display: block;
  width: 100%;
  padding: 3px 8px;
  border: none;
  border-top: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-button-face);
  cursor: pointer;
  font-size: 10px;
  font-family: inherit;
  color: var(--sz-color-button-text);
  text-align: center;
}

.slicer-clear-btn:hover {
  background: var(--sz-color-button-light);
  color: var(--sz-color-highlight);
}

/* ── Slicer field preview ──────────────────────────────── */
#slicer-field-preview {
  font-size: 10px;
  color: var(--sz-color-gray-text);
  background: var(--sz-color-window);
}

/* ── Group Field numeric options ──────────────────────── */
#group-numeric-opts p {
  font-size: 10px;
  color: var(--sz-color-gray-text);
}

/* ── Sparkline Options dialog tabs ──────────────────────── */
.sp-tab { padding: 3px 10px; cursor: default; font-size: 11px; border: 1px solid transparent; border-bottom: none; margin-bottom: -1px; font-family: inherit; background: none; color: var(--sz-color-button-text); }
.sp-tab:hover { background: var(--sz-color-button-light); }
.sp-tab.active { background: var(--sz-color-button-face); border-color: var(--sz-color-button-shadow); border-bottom: 1px solid var(--sz-color-button-face); font-weight: bold; }
.sp-panel { display: none; }
.sp-panel.active { display: block; }

/* ── Freeze pane indicator (enhanced) ───────────────────── */
.freeze-indicator-col {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--sz-color-button-dark-shadow);
  z-index: 7;
  pointer-events: none;
  box-shadow: 1px 0 2px rgba(0,0,0,0.3);
}

.freeze-indicator-row {
  position: absolute;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--sz-color-button-dark-shadow);
  z-index: 7;
  pointer-events: none;
  box-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

/* ── Frozen pane containers ─────────────────────────────── */
.frozen-corner {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 12;
  overflow: hidden;
  background: var(--sz-color-window);
}

.frozen-rows {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 11;
  overflow: hidden;
  background: var(--sz-color-window);
}

.frozen-cols {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  overflow: hidden;
  background: var(--sz-color-window);
}

.frozen-corner table,
.frozen-rows table,
.frozen-cols table {
  border-collapse: collapse;
  table-layout: fixed;
}

/* ── Print page setup media queries ─────────────────────── */
@media print {
  .ps-print-header, .ps-print-footer {
    position: fixed;
    left: 0;
    right: 0;
    font-size: 10px;
    text-align: center;
    color: #333;
  }
  .ps-print-header { top: 0; }
  .ps-print-footer { bottom: 0; }
}

/* ── Undo History Dropdown ──────────────────────────────── */
.undo-dropdown-wrap { display: inline-flex; }
.qat-dropdown-arrow { padding: 0 2px; font-size: 8px; }
.undo-history-popup {
  position: absolute;
  z-index: 5000;
  background: var(--sz-color-window, #fff);
  border: 1px solid var(--sz-color-button-shadow, #999);
  box-shadow: 0 2px 8px rgba(0,0,0,.18);
  max-height: 300px;
  overflow-y: auto;
  min-width: 200px;
  font-size: 11px;
}
.undo-history-item {
  padding: 4px 8px;
  cursor: default;
}
.undo-history-item:hover, .undo-history-item.highlight {
  background: var(--sz-color-highlight, #0078d4);
  color: var(--sz-color-highlight-text, #fff);
}
.undo-history-footer {
  padding: 4px 8px;
  border-top: 1px solid var(--sz-color-button-shadow, #ccc);
  font-size: 10px;
  color: var(--sz-color-gray-text, #666);
  text-align: center;
}

/* ── Sheet Tab Drag Reorder ──────────────────────────────────── */
.sheet-tab[draggable] {
  cursor: grab;
}
.sheet-tab[draggable]:active {
  cursor: grabbing;
}
.sheet-tab.drag-over {
  border-left: 3px solid var(--sz-color-highlight, #0078d4);
}

/* ── Cell Hyperlink (HYPERLINK formula) ──────────────────────── */
.cell-hyperlink {
  color: var(--sz-color-hot-tracking, #0066cc);
  text-decoration: underline;
  cursor: pointer;
  font-size: inherit;
  font-family: inherit;
}
.cell-hyperlink:hover {
  color: var(--sz-color-highlight, #0078d4);
}
.grid-table tbody td.cell.has-hyperlink-formula {
  cursor: pointer;
}

/* ── Comment Popup & Threading ───────────────────────────────── */
.comment-popup {
  position: fixed;
  z-index: 5500;
  background: var(--sz-color-window, #fff);
  border: 1px solid var(--sz-color-button-shadow, #999);
  box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.2);
  min-width: 260px;
  max-width: 340px;
  max-height: 400px;
  overflow-y: auto;
  font-size: 11px;
}
.comment-popup-header {
  background: var(--sz-color-highlight, #0078d4);
  color: var(--sz-color-highlight-text, #fff);
  padding: 4px 8px;
  font-weight: bold;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.comment-popup-close {
  cursor: default;
  padding: 0 4px;
  font-size: 14px;
  line-height: 1;
}
.comment-popup-close:hover {
  background: rgba(255, 255, 255, 0.2);
}
.comment-thread {
  padding: 4px 0;
}
.comment-entry {
  padding: 6px 8px;
  border-bottom: 1px solid var(--sz-color-button-shadow, #e0e0e0);
}
.comment-entry:last-child {
  border-bottom: none;
}
.comment-meta {
  font-size: 9px;
  color: var(--sz-color-gray-text, #888);
  margin-bottom: 2px;
}
.comment-text {
  font-size: 11px;
  color: var(--sz-color-window-text, #000);
  margin-bottom: 4px;
  white-space: pre-wrap;
  word-break: break-word;
}
.comment-actions {
  display: flex;
  gap: 6px;
}
.comment-action-btn {
  font-size: 10px;
  padding: 1px 6px;
  border: 1px solid var(--sz-color-button-shadow, #999);
  background: var(--sz-color-button-face, #f0f0f0);
  cursor: default;
  font-family: inherit;
  color: var(--sz-color-button-text);
}
.comment-action-btn:hover {
  background: var(--sz-color-button-light);
  border-color: var(--sz-color-highlight);
}
.comment-reply {
  margin-left: 16px;
  padding: 4px 0;
  border-left: 2px solid var(--sz-color-button-shadow, #ccc);
  padding-left: 8px;
  margin-top: 4px;
}
.comment-add-area {
  display: flex;
  gap: 4px;
  padding: 6px 8px;
  border-top: 1px solid var(--sz-color-button-shadow, #e0e0e0);
}
.comment-add-input {
  flex: 1;
  padding: 2px 4px;
  font-size: 11px;
  font-family: inherit;
  border: 1px solid var(--sz-color-button-shadow, #999);
  outline: none;
}

/* ── Quick Analysis Tool ─────────────────────────────────── */
.quick-analysis-btn {
  position: absolute;
  z-index: 50;
  width: 22px;
  height: 22px;
  border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-button-face);
  cursor: default;
  font-size: 12px;
  line-height: 20px;
  text-align: center;
  box-shadow: 1px 1px 3px rgba(0,0,0,0.15);
  color: var(--sz-color-highlight);
  user-select: none;
}
.quick-analysis-btn:hover {
  background: var(--sz-color-button-light);
  border-color: var(--sz-color-highlight);
}

.quick-analysis-popup {
  position: absolute;
  z-index: 5000;
  background: var(--sz-color-window);
  border: 1px solid var(--sz-color-button-shadow);
  box-shadow: 2px 2px 8px rgba(0,0,0,0.2);
  min-width: 320px;
  font-size: 11px;
}
.qa-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-button-face);
}
.qa-tab {
  padding: 4px 12px;
  cursor: default;
  font-size: 11px;
  border: none;
  background: none;
  font-family: inherit;
  color: var(--sz-color-button-text);
  border-bottom: 2px solid transparent;
}
.qa-tab:hover { background: var(--sz-color-button-light); }
.qa-tab.active {
  border-bottom-color: var(--sz-color-highlight);
  font-weight: bold;
  color: var(--sz-color-highlight);
}
.qa-panel { display: none; padding: 8px; }
.qa-panel.active { display: block; }
.qa-option {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 10px;
  cursor: default;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 10px;
  min-width: 60px;
  text-align: center;
  gap: 2px;
}
.qa-option:hover {
  border-color: var(--sz-color-highlight);
  background: var(--sz-color-button-light);
}
.qa-option-icon { font-size: 16px; }

/* ── Flash Fill Ghost Preview ────────────────────────────── */
.grid-table tbody td.cell.flash-fill-ghost {
  color: #999 !important;
  font-style: italic;
}

/* ── Get Data Dialog ─────────────────────────────────────── */
.gd-source-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.gd-source-tabs label {
  font-size: 11px;
  cursor: pointer;
}
.gd-preview-grid {
  border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-window);
  max-height: 200px;
  overflow: auto;
  font-size: 11px;
  margin-top: 8px;
}
.gd-preview-grid table {
  border-collapse: collapse;
  width: 100%;
  table-layout: auto;
}
.gd-preview-grid th {
  background: var(--sz-color-button-face);
  border: 1px solid var(--sz-color-button-shadow);
  padding: 2px 6px;
  font-weight: bold;
  font-size: 10px;
  text-align: left;
  white-space: nowrap;
  position: sticky;
  top: 0;
}
.gd-preview-grid td {
  border: 1px solid var(--sz-color-button-shadow);
  padding: 2px 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 150px;
}
.gd-drop-area {
  border: 2px dashed var(--sz-color-button-shadow);
  padding: 16px;
  text-align: center;
  margin: 8px 0;
  font-size: 11px;
  color: var(--sz-color-gray-text);
  cursor: pointer;
}
.gd-drop-area:hover {
  border-color: var(--sz-color-highlight);
  color: var(--sz-color-highlight);
}
.gd-delimiter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

/* ── Calendar Popup ──────────────────────────────────────── */
.calendar-popup {
  position: absolute;
  z-index: 5500;
  background: var(--sz-color-window);
  border: 1px solid var(--sz-color-button-shadow);
  box-shadow: 2px 2px 8px rgba(0,0,0,0.2);
  padding: 4px;
  font-size: 11px;
  user-select: none;
  min-width: 200px;
}
.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 2px;
  font-weight: bold;
}
.calendar-nav {
  cursor: default;
  padding: 0 6px;
  font-size: 14px;
  border: none;
  background: none;
  color: var(--sz-color-button-text);
  font-family: inherit;
}
.calendar-nav:hover { color: var(--sz-color-highlight); }
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  text-align: center;
}
.calendar-dow {
  font-size: 9px;
  font-weight: bold;
  color: var(--sz-color-gray-text);
  padding: 2px 0;
}
.calendar-day {
  padding: 3px 2px;
  cursor: default;
  border: 1px solid transparent;
  font-size: 11px;
  min-width: 24px;
}
.calendar-day:hover {
  background: var(--sz-color-button-light);
  border-color: var(--sz-color-highlight);
}
.calendar-day.today {
  font-weight: bold;
  color: var(--sz-color-highlight);
}
.calendar-day.other-month {
  color: var(--sz-color-gray-text);
  opacity: 0.5;
}
.calendar-day.selected {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}