.OfficeToolbarButton,
.OfficeToolbarSelect,
.OfficeSpreadsheetMenuTab,
.OfficeSpreadsheetRibbonButton,
.OfficeSpreadsheetSheetAdd,
.OfficeSpreadsheetSheetHiddenToggle,
.OfficeSpreadsheetHiddenSheetAction,
.OfficeSpreadsheetFormulaInput,
.OfficeSpreadsheetCellInput,
.OfficeSpreadsheetSheetTab {
    font: inherit;
}

.OfficeSpreadsheetShell {
    --office-accent: #18c8c8;
    --office-accent-alt: #3a7bff;
    --office-surface: #0e1014;
    --office-surface-strong: #0b0d11;
    --office-panel: rgba(255, 255, 255, 0.04);
    --office-input: rgba(255, 255, 255, 0.05);
    --office-border: rgba(255, 255, 255, 0.08);
    --office-text: var(--text-color, #e6ebf5);
    --office-muted: var(--unselected-text-color, rgba(230, 235, 245, 0.62));
    --office-grid-header: #0f151d;
    --office-grid-cell: rgba(255, 255, 255, 0.02);
    --office-grid-cell-focus: rgba(24, 200, 200, 0.08);
    --office-shadow: 0 20px 48px rgba(0, 0, 0, 0.36);
    display: flex;
    flex-direction: column;
    min-height: 0;
    border: 1px solid var(--office-border);
    border-radius: 24px;
    background:
        radial-gradient(circle at top left, rgba(24, 200, 200, 0.1), transparent 28%),
        linear-gradient(180deg, var(--office-surface-strong), var(--office-surface));
    box-shadow: var(--office-shadow);
    overflow: hidden;
}

.OfficeSpreadsheetMenuBar,
.OfficeSpreadsheetRibbon {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--office-border);
}

.OfficeSpreadsheetMenuBar {
    background: var(--office-surface-strong);
}

.OfficeSpreadsheetRibbon {
    background: var(--office-surface);
}

.OfficeSpreadsheetRibbonGroup {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-right: 14px;
    border-right: 1px solid var(--office-border);
}

.OfficeSpreadsheetRibbonGroup:last-child {
    border-right: none;
    padding-right: 0;
}

.OfficeSpreadsheetRibbonTitle {
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--office-muted);
}

.OfficeSpreadsheetRibbonRow,
.OfficeSpreadsheetSheets {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.OfficeSpreadsheetSheets {
    flex: 1 1 auto;
    min-width: 0;
}

.OfficeSpreadsheetMenuTab,
.OfficeSpreadsheetRibbonButton,
.OfficeSpreadsheetSheetAdd,
.OfficeSpreadsheetSheetHiddenToggle,
.OfficeSpreadsheetHiddenSheetAction {
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid var(--office-border);
    border-radius: 12px;
    background: var(--office-panel);
    color: var(--office-text);
    cursor: pointer;
    transition: background-color 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.OfficeSpreadsheetMenuTab:hover,
.OfficeSpreadsheetRibbonButton:hover,
.OfficeSpreadsheetSheetAdd:hover,
.OfficeSpreadsheetSheetHiddenToggle:hover,
.OfficeSpreadsheetHiddenSheetAction:hover {
    background: rgba(24, 200, 200, 0.12);
    border-color: rgba(24, 200, 200, 0.28);
    transform: translateY(-1px);
}

.OfficeSpreadsheetMenuTab.is-active {
    background: rgba(24, 200, 200, 0.14);
    border-color: rgba(24, 200, 200, 0.32);
}

html.light-theme .OfficeSpreadsheetShell {
    --office-surface: #ffffff;
    --office-surface-strong: #f7f9fc;
    --office-panel: rgba(48, 69, 96, 0.08);
    --office-input: rgba(48, 69, 96, 0.08);
    --office-border: rgba(48, 69, 96, 0.14);
    --office-text: var(--text-color, #304560);
    --office-muted: var(--unselected-text-color, rgba(48, 69, 96, 0.7));
    --office-grid-header: #eef3f8;
    --office-grid-cell: rgba(48, 69, 96, 0.04);
    --office-grid-cell-focus: rgba(24, 200, 200, 0.12);
    --office-shadow: 0 18px 38px rgba(48, 69, 96, 0.12);
}

.OfficeToolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    padding: 16px 18px;
    border-bottom: 1px solid var(--office-border);
    background: var(--office-surface-strong);
}

.OfficeToolbarGroup {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    padding-right: 14px;
    border-right: 1px solid var(--office-border);
}

.OfficeToolbarGroup:last-child {
    border-right: none;
    padding-right: 0;
}

.OfficeToolbarButton,
.OfficeToolbarSelect,
.OfficeSpreadsheetSheetTab {
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid var(--office-border);
    border-radius: 12px;
    background: var(--office-panel);
    color: var(--office-text);
    cursor: pointer;
    transition: background-color 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.OfficeToolbarButton:hover,
.OfficeToolbarSelect:hover,
.OfficeSpreadsheetSheetTab:hover {
    background: rgba(24, 200, 200, 0.12);
    border-color: rgba(24, 200, 200, 0.28);
    transform: translateY(-1px);
}

.OfficeToolbarButton[data-variant='primary'] {
    background: linear-gradient(135deg, var(--office-accent), var(--office-accent-alt));
    border-color: transparent;
    color: #ffffff;
}

.OfficeSpreadsheetFormulaBar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--office-border);
    background: var(--office-surface);
}

.OfficeSpreadsheetFormulaInput {
    flex: 1 1 auto;
    min-width: 0;
    padding: 12px 14px;
    border: 1px solid var(--office-border);
    border-radius: 14px;
    background: var(--office-input);
    color: var(--office-text);
}

.OfficeSpreadsheetFormulaInput::placeholder {
    color: var(--office-muted);
}

.OfficeSpreadsheetCellRef {
    font-size: 0.84rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--office-muted);
}

.OfficeSpreadsheetFormulaFx {
    font-weight: 600;
    color: var(--office-muted);
}

.OfficeSpreadsheetGridWrap {
    min-height: 0;
    padding: 0 14px 16px;
    background:
        radial-gradient(circle at top, rgba(24, 200, 200, 0.06), transparent 34%),
        linear-gradient(180deg, var(--office-surface-strong), var(--office-surface));
}

.OfficeSpreadsheetGridScroller {
    overflow: auto;
}

.OfficeSpreadsheetGrid {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    min-width: 880px;
}

.OfficeSpreadsheetGrid th,
.OfficeSpreadsheetGrid td {
    border-right: 1px solid var(--office-border);
    border-bottom: 1px solid var(--office-border);
}

.OfficeSpreadsheetGrid th {
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--office-grid-header);
    color: var(--office-text);
    font-weight: 600;
    text-align: center;
    padding: 10px 8px;
}

.OfficeSpreadsheetGrid .OfficeSpreadsheetRowHeader {
    position: sticky;
    left: 0;
    z-index: 1;
    min-width: 52px;
    background: var(--office-grid-header);
}

.OfficeSpreadsheetCellInput {
    width: 100%;
    min-width: 120px;
    padding: 10px 12px;
    border: none;
    background: var(--office-grid-cell);
    color: var(--office-text);
}

.OfficeSpreadsheetCellInput:focus {
    outline: 2px solid rgba(24, 200, 200, 0.72);
    outline-offset: -2px;
    background: var(--office-grid-cell-focus);
}

.OfficeSpreadsheetSheetsBar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    border-top: 1px solid var(--office-border);
    background: var(--office-surface-strong);
}

.OfficeSpreadsheetSheetsTabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
}

.OfficeSpreadsheetHiddenSheets {
    display: none;
    padding-top: 12px;
}

.OfficeSpreadsheetHiddenSheets.is-open {
    display: grid;
    gap: 8px;
}

.OfficeSpreadsheetHiddenSheetItem {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    border: 1px solid var(--office-border);
    border-radius: 14px;
    background: var(--office-panel);
    color: var(--office-text);
}

.OfficeSpreadsheetSheetTab.is-active {
    background: rgba(24, 200, 200, 0.14);
    border-color: rgba(24, 200, 200, 0.36);
}

@media (max-width: 960px) {
    .OfficeSpreadsheetMenuBar,
    .OfficeSpreadsheetRibbon,
    .OfficeToolbar,
    .OfficeSpreadsheetFormulaBar,
    .OfficeSpreadsheetSheetsBar {
        padding: 12px;
    }
}