/* GRID — PROFESSIONAL SPREADSHEET WORKSPACE STYLES */
:root {
  --primary-color: #107c41; /* Clean green accent for Grid */
  --primary-hover: #0e6b37;
  --primary-light: #e8f5e9;
  --accent-color: #0078d4;
  --bg-top-bar: #f3f3f3;
  --bg-ribbon: #fbfbfb;
  --bg-grid-header: #f8f9fa;
  --border-color: #d1d5db;
  --border-grid: #e2e8f0;
  --selection-color: #107c41;
  --selection-bg: rgba(16, 124, 65, 0.12);
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --font-sans: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --font-mono: 'Consolas', 'Courier New', monospace;
}

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

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-main);
  background-color: #ffffff;
}

/* APP SHELL */
.grid-app-shell {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* TOP APP BAR */
.top-app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 42px;
  padding: 0 16px;
  background-color: var(--bg-top-bar);
  border-bottom: 1px solid var(--border-color);
  user-select: none;
}

.app-branding {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-icon {
  font-size: 20px;
}

.app-title-wrap {
  display: flex;
  flex-direction: column;
}

.workbook-title-input {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  border: 1px solid transparent;
  background: transparent;
  border-radius: 4px;
  padding: 1px 4px;
  outline: none;
}

.workbook-title-input:hover, .workbook-title-input:focus {
  border-color: var(--border-color);
  background: #ffffff;
}

.app-subtitle {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: -2px;
}

.quick-access-bar {
  display: flex;
  align-items: center;
  gap: 6px;
}

.qab-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 28px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-main);
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.qab-btn:hover {
  background-color: #f0f0f0;
  border-color: #b0b0b0;
}

.qab-btn.btn-highlight {
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.green {
  background-color: #107c41;
}

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

.save-status-badge {
  font-size: 11px;
  color: #107c41;
  font-weight: 500;
}

.user-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 12px;
}

/* RIBBON TABS */
.ribbon-tabs {
  display: flex;
  background-color: var(--bg-top-bar);
  padding: 0 12px;
  border-bottom: 1px solid var(--border-color);
  user-select: none;
}

.ribbon-tab {
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  color: #4b5563;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ribbon-tab:hover {
  color: var(--text-main);
  background-color: #e5e7eb;
}

.ribbon-tab.active {
  color: var(--primary-color);
  font-weight: 600;
  border-bottom-color: var(--primary-color);
  background-color: var(--bg-ribbon);
}

/* RIBBON CONTENT PANEL */
.ribbon-content-bar {
  min-height: 85px;
  background-color: var(--bg-ribbon);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: stretch;
  padding: 6px 12px;
  overflow-x: auto;
  user-select: none;
}

.ribbon-panel {
  display: none;
  align-items: center;
  gap: 12px;
}

.ribbon-panel.active {
  display: flex;
}

.ribbon-group {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.ribbon-group-title {
  font-size: 10px;
  color: var(--text-muted);
  text-align: center;
  font-weight: 500;
  margin-top: 4px;
}

.ribbon-buttons {
  display: flex;
  align-items: center;
  gap: 4px;
}

.ribbon-controls-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

.ribbon-divider {
  width: 1px;
  background-color: var(--border-color);
  margin: 2px 8px;
}

.r-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 30px;
  padding: 0 8px;
  font-size: 11px;
  color: var(--text-main);
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.1s ease;
  white-space: nowrap;
}

.r-btn:hover {
  background: #f3f4f6;
  border-color: #9ca3af;
}

.r-btn-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.1s ease;
}

.r-btn-icon:hover {
  background: #e5e7eb;
}

.r-btn-icon.active {
  background: var(--primary-light);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.r-select {
  height: 28px;
  padding: 0 6px;
  font-size: 11px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background: #ffffff;
  outline: none;
}

.r-color-picker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  cursor: pointer;
  position: relative;
  background: #ffffff;
}

.r-color-picker input[type="color"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.r-checkbox-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  cursor: pointer;
  margin-right: 8px;
}

.r-btn-file-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 30px;
  padding: 0 8px;
  font-size: 11px;
  color: var(--text-main);
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  cursor: pointer;
}

/* FORMULA BAR & NAME BOX */
.formula-bar-container {
  display: flex;
  align-items: center;
  height: 32px;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 0 8px;
  gap: 6px;
}

.name-box-wrap {
  width: 90px;
  flex-shrink: 0;
}

.name-box-select {
  width: 100%;
  height: 24px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 0 4px;
  background: #f9fafb;
}

.formula-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.fx-action-btn {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  font-size: 12px;
  font-weight: bold;
  border-radius: 3px;
  cursor: pointer;
}

.fx-action-btn:hover {
  background: #e5e7eb;
}

.fx-action-btn.cancel-btn { color: #dc2626; }
.fx-action-btn.accept-btn { color: #16a34a; }
.fx-action-btn.fx-btn { color: var(--primary-color); font-style: italic; }

.formula-input-wrap {
  flex: 1;
}

.formula-input {
  width: 100%;
  height: 24px;
  font-size: 12px;
  font-family: var(--font-mono);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 0 8px;
  outline: none;
}

.formula-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px var(--selection-bg);
}

/* CANVAS MATRIX CONTAINER */
.grid-canvas-container {
  flex: 1;
  position: relative;
  overflow: auto;
  background-color: #ffffff;
}

.grid-scroll-wrapper {
  min-width: 100%;
  display: inline-block;
}

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

/* HEADERS */
th.corner-header {
  width: 40px;
  height: 26px;
  background-color: var(--bg-grid-header);
  border: 1px solid var(--border-grid);
  position: sticky;
  top: 0;
  left: 0;
  z-index: 10;
}

th.col-header {
  min-width: 90px;
  height: 26px;
  background-color: var(--bg-grid-header);
  border: 1px solid var(--border-grid);
  font-size: 11px;
  font-weight: 600;
  color: #4b5563;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 5;
  cursor: pointer;
}

th.col-header:hover, th.col-header.selected-hdr {
  background-color: #e2e8f0;
  color: var(--primary-color);
}

th.row-header {
  width: 40px;
  height: 24px;
  background-color: var(--bg-grid-header);
  border: 1px solid var(--border-grid);
  font-size: 11px;
  font-weight: 500;
  color: #4b5563;
  text-align: center;
  position: sticky;
  left: 0;
  z-index: 5;
  cursor: pointer;
}

th.row-header:hover, th.row-header.selected-hdr {
  background-color: #e2e8f0;
  color: var(--primary-color);
}

/* GRID CELLS */
td.grid-cell {
  height: 24px;
  min-width: 90px;
  max-width: 250px;
  border: 1px solid var(--border-grid);
  padding: 2px 6px;
  font-size: 12px;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: cell;
  position: relative;
}

td.grid-cell.selected {
  outline: 2px solid var(--primary-color);
  outline-offset: -2px;
  z-index: 2;
  background-color: #ffffff;
}

td.grid-cell.in-range {
  background-color: var(--selection-bg);
}

/* FILL HANDLE */
.fill-handle {
  width: 6px;
  height: 6px;
  background-color: var(--primary-color);
  position: absolute;
  right: -1px;
  bottom: -1px;
  cursor: crosshair;
  z-index: 4;
}

.cell-editor {
  width: 100%;
  height: 100%;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: inherit;
  background: transparent;
  padding: 0;
}

/* CHART OVERLAYS */
.chart-overlay-container {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 15;
}

.chart-card {
  position: absolute;
  pointer-events: auto;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  padding: 12px;
  display: flex;
  flex-direction: column;
}

.chart-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: bold;
  font-size: 13px;
  margin-bottom: 8px;
}

/* SHEET TABS & FOOTER */
.sheet-tabs-footer {
  height: 32px;
  background-color: var(--bg-top-bar);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  user-select: none;
}

.sheet-tabs-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.sheet-tab {
  height: 28px;
  padding: 0 14px;
  font-size: 12px;
  font-weight: 500;
  color: #4b5563;
  background: #e5e7eb;
  border: 1px solid var(--border-color);
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: all 0.1s ease;
}

.sheet-tab.active {
  background: #ffffff;
  color: var(--primary-color);
  font-weight: 600;
  border-top: 2px solid var(--primary-color);
}

.btn-add-sheet {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: #ffffff;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 4px;
}

.status-bar-metrics {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 11px;
  color: #4b5563;
}

.metric-item b {
  color: var(--text-main);
}

/* MODAL DIALOGS */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-dialog {
  width: 450px;
  max-width: 90vw;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 12px 16px;
  background: #f8f9fa;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-body {
  padding: 16px;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-footer {
  padding: 12px 16px;
  background: #f8f9fa;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.btn-primary {
  background: var(--primary-color);
  color: #ffffff;
  border: none;
  padding: 6px 14px;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 4px;
  cursor: pointer;
}