/* Microsoft Excel 365 Web Replica Stylesheet */
:root {
  --excel-green: #107c41;
  --excel-green-dark: #0b5a2f;
  --excel-green-light: #e2efda;
  --excel-green-hover: #0d6535;
  --excel-green-tint: rgba(16, 124, 65, 0.1);
  --excel-selection-bg: rgba(16, 124, 65, 0.08);
  --excel-border: #d2d0ce;
  --excel-border-subtle: #e1dfdd;
  --excel-gridline: #e1dfdd;
  --excel-header-bg: #f3f2f1;
  --excel-header-hover: #edebe9;
  --excel-header-active: #d2d0ce;
  --excel-text: #201f1e;
  --excel-text-secondary: #605e5c;
  --excel-bg: #ffffff;
  --excel-status-bg: #107c41;
  --excel-font: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif;
  --excel-mono: Consolas, "Courier New", monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--excel-font);
  font-size: 11pt;
  color: var(--excel-text);
  background-color: #f3f2f1;
}

#excel-app {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  background: #ffffff;
  position: relative;
}

/* ============================================================
   1. TITLE BAR & QUICK ACCESS TOOLBAR
   ============================================================ */
.excel-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
  background-color: var(--excel-green);
  color: #ffffff;
  padding: 0 12px;
  font-size: 12px;
  flex-shrink: 0;
  z-index: 50;
}

.title-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.waffle-btn {
  background: none;
  border: none;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: 6px;
  border-radius: 4px;
}
.waffle-btn:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.app-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-name {
  font-weight: 600;
  font-size: 14px;
}

.doc-name-box {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(255, 255, 255, 0.12);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
}
.doc-name-box:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.doc-title-input {
  background: transparent;
  border: none;
  color: #ffffff;
  font-weight: 600;
  font-size: 13px;
  font-family: inherit;
  outline: none;
  width: 130px;
}

.doc-status {
  font-size: 11px;
  opacity: 0.85;
}

/* Quick Access Toolbar */
.qat-group {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.qat-btn {
  background: none;
  border: none;
  color: #ffffff;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
}
.qat-btn:hover {
  background-color: rgba(255, 255, 255, 0.15);
}
.qat-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.autosave-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  margin-right: 6px;
}
.autosave-switch {
  width: 28px;
  height: 16px;
  background-color: #ffffff;
  border-radius: 10px;
  position: relative;
  transition: 0.2s;
}
.autosave-switch.active {
  background-color: #ffffff;
}
.autosave-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 12px;
  height: 12px;
  background-color: var(--excel-green);
  border-radius: 50%;
  transition: 0.2s;
}
.autosave-switch.active::after {
  left: 14px;
}

/* Search Bar (Alt+Q) */
.title-center {
  flex: 1;
  max-width: 440px;
  margin: 0 16px;
}

.search-box {
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.18);
  border-radius: 4px;
  padding: 4px 10px;
  color: #ffffff;
  cursor: text;
}
.search-box:hover, .search-box:focus-within {
  background-color: #ffffff;
  color: var(--excel-text);
}
.search-box input {
  background: transparent;
  border: none;
  outline: none;
  width: 100%;
  font-family: inherit;
  font-size: 12px;
  color: inherit;
  margin-left: 8px;
}
.search-box input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}
.search-box:focus-within input::placeholder {
  color: var(--excel-text-secondary);
}

.title-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-avatar {
  width: 28px;
  height: 28px;
  background-color: #004578;
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

/* ============================================================
   2. RIBBON TABS & CONTROLS
   ============================================================ */
.excel-ribbon-container {
  background-color: #ffffff;
  border-bottom: 1px solid var(--excel-border);
  flex-shrink: 0;
  z-index: 40;
}

.ribbon-tabs-bar {
  display: flex;
  align-items: center;
  background-color: #ffffff;
  padding-left: 8px;
  border-bottom: 1px solid var(--excel-border-subtle);
  height: 32px;
}

.ribbon-tab {
  padding: 0 14px;
  height: 100%;
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  color: var(--excel-text);
  border-bottom: 2px solid transparent;
  transition: background 0.15s;
}
.ribbon-tab:hover {
  background-color: var(--excel-header-hover);
}
.ribbon-tab.active {
  color: var(--excel-green);
  font-weight: 600;
  border-bottom-color: var(--excel-green);
}

.file-tab {
  background-color: var(--excel-green) !important;
  color: #ffffff !important;
  font-weight: 600;
  border-radius: 3px 3px 0 0;
  margin-right: 4px;
}
.file-tab:hover {
  background-color: var(--excel-green-dark) !important;
}

/* Ribbon Content Panels */
.ribbon-panel {
  display: none;
  height: 94px;
  padding: 4px 8px;
  background-color: #ffffff;
  overflow-x: auto;
  align-items: stretch;
}
.ribbon-panel.active {
  display: flex;
}

.ribbon-group {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0 6px;
  border-right: 1px solid var(--excel-border-subtle);
  height: 100%;
  flex-shrink: 0;
}
.ribbon-group-content {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.ribbon-group-title {
  text-align: center;
  font-size: 10px;
  color: var(--excel-text-secondary);
  padding-top: 2px;
  letter-spacing: 0.2px;
}

/* Ribbon Buttons & Controls */
.ribbon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  color: var(--excel-text);
  font-family: inherit;
  font-size: 12px;
  padding: 3px 6px;
  transition: background 0.1s, border-color 0.1s;
}
.ribbon-btn:hover {
  background-color: var(--excel-header-hover);
  border-color: var(--excel-border-subtle);
}
.ribbon-btn:active, .ribbon-btn.active {
  background-color: #e1dfdd;
  border-color: #c8c6c4;
}

.ribbon-btn-large {
  flex-direction: column;
  padding: 6px 8px;
  height: 66px;
  min-width: 48px;
  gap: 4px;
}
.ribbon-btn-large svg {
  width: 26px;
  height: 26px;
}
.ribbon-btn-large span {
  font-size: 11px;
}

.ribbon-col {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ribbon-row {
  display: flex;
  align-items: center;
  gap: 2px;
}

.ribbon-select {
  height: 24px;
  padding: 0 4px;
  border: 1px solid var(--excel-border-subtle);
  border-radius: 2px;
  background: #ffffff;
  font-size: 12px;
  color: var(--excel-text);
  outline: none;
  cursor: pointer;
}
.ribbon-select:hover {
  border-color: var(--excel-border);
}

.font-family-select {
  width: 110px;
}
.font-size-select {
  width: 46px;
}
.number-format-select {
  width: 120px;
}

.color-picker-wrapper {
  position: relative;
  display: inline-flex;
}

.color-bar {
  position: absolute;
  bottom: 2px;
  left: 4px;
  right: 4px;
  height: 3px;
  border-radius: 1px;
}

/* ============================================================
   3. FORMULA BAR & NAME BOX
   ============================================================ */
.excel-formula-row {
  display: flex;
  align-items: center;
  height: 28px;
  background-color: #ffffff;
  border-bottom: 1px solid var(--excel-border);
  padding: 0 4px;
  flex-shrink: 0;
  z-index: 30;
}

.name-box-wrapper {
  width: 84px;
  height: 22px;
  display: flex;
  align-items: center;
  border: 1px solid transparent;
  border-radius: 2px;
  padding: 0 4px;
}
.name-box-wrapper:hover, .name-box-wrapper:focus-within {
  border-color: var(--excel-border);
}

#name-box {
  width: 100%;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  color: var(--excel-text);
  text-transform: uppercase;
}

.formula-divider {
  width: 1px;
  height: 18px;
  background-color: var(--excel-border-subtle);
  margin: 0 6px;
}

.formula-buttons {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-right: 6px;
}

.formula-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  color: var(--excel-text-secondary);
}
.formula-btn:hover {
  background-color: var(--excel-header-hover);
  border-color: var(--excel-border-subtle);
}

#fx-cancel:hover {
  color: #d13438;
}
#fx-commit:hover {
  color: var(--excel-green);
}
#fx-wizard {
  font-style: italic;
  font-family: serif;
  font-weight: bold;
  font-size: 14px;
}

.formula-input-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  height: 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  padding: 0 6px;
}
.formula-input-wrapper:hover, .formula-input-wrapper:focus-within {
  border-color: var(--excel-border);
}

#formula-input {
  width: 100%;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 12px;
  color: var(--excel-text);
  background: transparent;
  user-select: text;
  -webkit-user-select: text;
}

/* ============================================================
   4. GRID VIEWPORT & CELLS
   ============================================================ */
.excel-grid-viewport {
  flex: 1;
  position: relative;
  overflow: scroll;
  background-color: #ffffff;
  outline: none;
}

.excel-grid-table {
  border-collapse: collapse;
  table-layout: fixed;
  user-select: none;
  background-color: #ffffff;
}

/* Top Left Select-All Header */
.corner-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 44px;
  height: 24px;
  background-color: var(--excel-header-bg);
  border-right: 1px solid var(--excel-border);
  border-bottom: 1px solid var(--excel-border);
  z-index: 25;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.corner-header::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 7px 7px;
  border-color: transparent transparent #a19f9d transparent;
}
.corner-header:hover {
  background-color: var(--excel-header-hover);
}

/* Column Headers */
.col-header {
  position: sticky;
  top: 0;
  height: 24px;
  background-color: var(--excel-header-bg);
  border-right: 1px solid var(--excel-border);
  border-bottom: 1px solid var(--excel-border);
  font-size: 11px;
  font-weight: 600;
  color: var(--excel-text-secondary);
  text-align: center;
  vertical-align: middle;
  z-index: 20;
  position: relative;
  cursor: pointer;
}
.col-header:hover {
  background-color: var(--excel-header-hover);
}
.col-header.selected {
  background-color: #e1dfdd;
  color: var(--excel-green-dark);
  border-bottom: 2px solid var(--excel-green);
}

.col-resizer {
  position: absolute;
  top: 0;
  right: -3px;
  width: 6px;
  height: 100%;
  cursor: col-resize;
  z-index: 22;
}

/* Row Headers */
.row-header {
  position: sticky;
  left: 0;
  width: 44px;
  background-color: var(--excel-header-bg);
  border-right: 1px solid var(--excel-border);
  border-bottom: 1px solid var(--excel-border);
  font-size: 11px;
  font-weight: 600;
  color: var(--excel-text-secondary);
  text-align: center;
  vertical-align: middle;
  z-index: 15;
  position: relative;
  cursor: pointer;
}
.row-header:hover {
  background-color: var(--excel-header-hover);
}
.row-header.selected {
  background-color: #e1dfdd;
  color: var(--excel-green-dark);
  border-right: 2px solid var(--excel-green);
}

.row-resizer {
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100%;
  height: 6px;
  cursor: row-resize;
  z-index: 17;
}

/* Data Cells */
.grid-cell {
  position: relative;
  border-right: 1px solid var(--excel-gridline);
  border-bottom: 1px solid var(--excel-gridline);
  padding: 2px 5px;
  font-size: 11pt;
  color: var(--excel-text);
  overflow: visible;
  white-space: nowrap;
  cursor: cell;
}

.hide-gridlines .grid-cell {
  border-right-color: transparent !important;
  border-bottom-color: transparent !important;
}

.grid-cell-content {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: clip;
}

.grid-cell-content.overflowing {
  overflow: visible !important;
  z-index: 2;
}

/* Active & Selection Range Overlays */
.selection-box {
  position: absolute;
  pointer-events: none;
  border: 1px solid var(--excel-green);
  background-color: var(--excel-selection-bg);
  z-index: 10;
}

.active-cell-border {
  position: absolute;
  pointer-events: none;
  border: 2px solid var(--excel-green);
  z-index: 12;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.5);
}

/* Edge Move Handles */
.edge-move-strip {
  position: absolute;
  pointer-events: auto;
  cursor: move;
  z-index: 13;
}
.edge-move-top {
  top: -3px;
  left: 0;
  right: 0;
  height: 6px;
}
.edge-move-bottom {
  bottom: -3px;
  left: 0;
  right: 8px;
  height: 6px;
}
.edge-move-left {
  top: 0;
  bottom: 0;
  left: -3px;
  width: 6px;
}
.edge-move-right {
  top: 0;
  bottom: 8px;
  right: -3px;
  width: 6px;
}

/* Fill Handle */
.fill-handle {
  position: absolute;
  bottom: -4px;
  right: -4px;
  width: 7px;
  height: 7px;
  background-color: var(--excel-green);
  border: 1px solid #ffffff;
  cursor: crosshair;
  z-index: 14;
  pointer-events: auto;
}

/* Autofill Drag Preview */
.autofill-preview-box {
  position: absolute;
  pointer-events: none;
  border: 1px dashed #605e5c;
  background-color: rgba(96, 94, 92, 0.08);
  z-index: 11;
}

/* Marching Ants (Copy / Cut border) */
.marching-ants-box {
  position: absolute;
  pointer-events: none;
  z-index: 13;
}
.marching-ants-box svg {
  width: 100%;
  height: 100%;
}
.marching-ants-rect {
  fill: none;
  stroke: var(--excel-green);
  stroke-width: 2;
  stroke-dasharray: 4, 4;
  animation: marchingAntsAnim 0.5s linear infinite;
}
@keyframes marchingAntsAnim {
  0% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: 8; }
}

/* Formula Reference Highlight Boxes */
.formula-ref-box {
  position: absolute;
  pointer-events: none;
  z-index: 11;
  border: 2px dashed;
  border-radius: 2px;
}

/* Drag to Move Ghost Box */
.drag-move-box {
  position: absolute;
  pointer-events: none;
  border: 2px dashed var(--excel-green);
  background-color: rgba(16, 124, 65, 0.12);
  z-index: 16;
}

/* In-Place Cell Editor */
#cell-editor {
  position: absolute;
  display: none;
  z-index: 35;
  background: #ffffff;
  border: 2px solid var(--excel-green);
  outline: none;
  padding: 2px 5px;
  font-family: inherit;
  font-size: 11pt;
  color: var(--excel-text);
  white-space: pre;
  overflow: hidden;
  user-select: text;
  -webkit-user-select: text;
  min-width: 80px;
  min-height: 24px;
}

/* Autocomplete Popup */
#formula-autocomplete {
  position: absolute;
  display: none;
  z-index: 60;
  background: #ffffff;
  border: 1px solid var(--excel-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-radius: 3px;
  max-height: 220px;
  overflow-y: auto;
  width: 240px;
  font-size: 11px;
}
.autocomplete-item {
  display: flex;
  align-items: center;
  padding: 5px 8px;
  cursor: pointer;
  gap: 6px;
}
.autocomplete-item:hover, .autocomplete-item.active {
  background-color: var(--excel-green-light);
  color: var(--excel-green-dark);
}
.autocomplete-name {
  font-weight: 600;
}
.autocomplete-desc {
  font-size: 10px;
  color: var(--excel-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

/* Function Signature Helper Tooltip */
#function-tooltip {
  position: absolute;
  display: none;
  z-index: 55;
  background: #ffffea;
  border: 1px solid #d2d0ce;
  border-radius: 3px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  padding: 4px 8px;
  font-size: 11px;
  color: var(--excel-text);
  pointer-events: none;
}
.tooltip-arg-active {
  font-weight: bold;
  color: var(--excel-green-dark);
}

/* Resize Guides */
.col-guide-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  border-left: 1px dotted #000000;
  z-index: 30;
  pointer-events: none;
}
.row-guide-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  border-top: 1px dotted #000000;
  z-index: 30;
  pointer-events: none;
}
.resize-tooltip {
  position: absolute;
  background: #333333;
  color: #ffffff;
  padding: 3px 6px;
  border-radius: 3px;
  font-size: 11px;
  pointer-events: none;
  z-index: 35;
}

/* ============================================================
   5. SHEET TABS BAR
   ============================================================ */
.excel-sheets-bar {
  display: flex;
  align-items: center;
  height: 32px;
  background-color: #f3f2f1;
  border-top: 1px solid var(--excel-border);
  padding: 0 6px;
  flex-shrink: 0;
  z-index: 40;
}

.sheet-nav-btn {
  background: none;
  border: none;
  color: var(--excel-text-secondary);
  width: 24px;
  height: 24px;
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sheet-nav-btn:hover {
  background-color: var(--excel-header-hover);
  color: var(--excel-text);
}

.sheet-tabs-container {
  display: flex;
  align-items: flex-end;
  height: 100%;
  overflow-x: auto;
  gap: 2px;
  margin: 0 4px;
}

.sheet-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 12px;
  background-color: #f3f2f1;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  font-size: 11px;
  color: var(--excel-text);
  cursor: pointer;
  position: relative;
  white-space: nowrap;
}
.sheet-tab:hover {
  background-color: #edebe9;
}
.sheet-tab.active {
  background-color: #ffffff;
  color: var(--excel-green-dark);
  font-weight: 600;
  border-color: var(--excel-border);
  border-top: 2px solid var(--excel-green);
  z-index: 2;
}

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

.sheet-rename-input {
  border: 1px solid var(--excel-green);
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  outline: none;
  padding: 1px 4px;
  width: 80px;
}

.add-sheet-btn {
  background: none;
  border: none;
  color: var(--excel-text-secondary);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}
.add-sheet-btn:hover {
  background-color: var(--excel-header-hover);
  color: var(--excel-green);
}

/* ============================================================
   6. STATUS BAR
   ============================================================ */
.excel-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 24px;
  background-color: var(--excel-status-bg);
  color: #ffffff;
  padding: 0 12px;
  font-size: 11px;
  flex-shrink: 0;
  z-index: 45;
}

.status-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-mode {
  font-weight: 600;
  letter-spacing: 0.3px;
}

.status-stats {
  display: flex;
  align-items: center;
  gap: 16px;
}
.stat-item {
  display: flex;
  align-items: center;
  gap: 4px;
}
.stat-label {
  opacity: 0.9;
}
.stat-val {
  font-weight: 600;
}

.status-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}
.zoom-btn {
  background: none;
  border: none;
  color: #ffffff;
  cursor: pointer;
  font-size: 14px;
  padding: 0 4px;
}
.zoom-slider {
  width: 70px;
  height: 4px;
  cursor: pointer;
  accent-color: #ffffff;
}
.zoom-pct {
  width: 36px;
  text-align: right;
  font-weight: 600;
  cursor: pointer;
}

/* ============================================================
   7. CONTEXT MENUS & DIALOGS
   ============================================================ */
.excel-context-menu {
  position: fixed;
  display: none;
  background: #ffffff;
  border: 1px solid var(--excel-border);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
  border-radius: 4px;
  padding: 4px 0;
  z-index: 1000;
  min-width: 190px;
  font-size: 12px;
}

.menu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 16px;
  cursor: pointer;
  color: var(--excel-text);
}
.menu-item:hover {
  background-color: var(--excel-header-hover);
}
.menu-item.disabled {
  opacity: 0.4;
  cursor: default;
}
.menu-item-shortcut {
  color: var(--excel-text-secondary);
  font-size: 11px;
  margin-left: 16px;
}
.menu-separator {
  height: 1px;
  background-color: var(--excel-border-subtle);
  margin: 4px 0;
}

/* Filter Dropdown on Column Header */
.filter-btn-header {
  position: absolute;
  right: 2px;
  bottom: 2px;
  width: 14px;
  height: 14px;
  background-color: #ffffff;
  border: 1px solid #8a8886;
  border-radius: 2px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 23;
}
.filter-btn-header.active {
  background-color: var(--excel-green);
  border-color: var(--excel-green-dark);
  color: #ffffff;
}

.excel-filter-popup {
  position: fixed;
  display: none;
  z-index: 1000;
  background: #ffffff;
  border: 1px solid var(--excel-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  width: 250px;
  padding: 8px;
  font-size: 12px;
}

/* Modals */
.excel-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.excel-modal {
  background: #ffffff;
  border-radius: 4px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-width: 90vw;
  max-height: 90vh;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: #f3f2f1;
  border-bottom: 1px solid var(--excel-border);
  font-weight: 600;
  font-size: 13px;
}

.modal-close-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  color: var(--excel-text-secondary);
}
.modal-close-btn:hover {
  color: #d13438;
}

.modal-body {
  padding: 16px;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 16px;
  background-color: #f3f2f1;
  border-top: 1px solid var(--excel-border);
}

.btn-primary {
  background-color: var(--excel-green);
  color: #ffffff;
  border: 1px solid var(--excel-green-dark);
  padding: 5px 16px;
  border-radius: 2px;
  cursor: pointer;
  font-weight: 600;
}
.btn-primary:hover {
  background-color: var(--excel-green-hover);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--excel-text);
  border: 1px solid var(--excel-border);
  padding: 5px 16px;
  border-radius: 2px;
  cursor: pointer;
}
.btn-secondary:hover {
  background-color: var(--excel-header-hover);
}

/* Backstage File Menu */
.excel-backstage {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #ffffff;
  z-index: 1500;
  display: none;
  flex-direction: row;
}

.backstage-sidebar {
  width: 220px;
  background-color: var(--excel-green);
  color: #ffffff;
  display: flex;
  flex-direction: column;
  padding: 16px 0;
}
.backstage-back-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  color: #ffffff;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}
.backstage-item {
  padding: 10px 20px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.backstage-item:hover, .backstage-item.active {
  background-color: rgba(255, 255, 255, 0.15);
}

.backstage-content {
  flex: 1;
  padding: 32px 48px;
  overflow-y: auto;
}

/* Color Palette Picker */
.palette-dropdown {
  position: absolute;
  display: none;
  z-index: 100;
  background: #ffffff;
  border: 1px solid var(--excel-border);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
  padding: 8px;
  border-radius: 3px;
  width: 180px;
}
.palette-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--excel-text-secondary);
  margin-bottom: 4px;
}
.palette-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 2px;
  margin-bottom: 8px;
}
.palette-swatch {
  width: 14px;
  height: 14px;
  border: 1px solid rgba(0,0,0,0.1);
  cursor: pointer;
  border-radius: 1px;
}
.palette-swatch:hover {
  transform: scale(1.2);
  z-index: 2;
  border-color: #000000;
}

/* Border Style Selector */
.border-dropdown {
  position: absolute;
  display: none;
  z-index: 100;
  background: #ffffff;
  border: 1px solid var(--excel-border);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
  padding: 4px 0;
  border-radius: 3px;
  width: 170px;
}
.border-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
}
.border-option:hover {
  background-color: var(--excel-header-hover);
}