/* =============================================================================
   GB SHEET - Modern Spreadsheet Styles
   Theme-aware, no sidebar, with AI chat panel
   ============================================================================= */

/* =============================================================================
   VARIABLES & BASE
   ============================================================================= */

:root {
    --sheet-grid-border: var(--sentient-border, #e0e0e0);
    --sheet-header-bg: var(--sentient-bg-secondary, #f5f5f5);
    --sheet-cell-selected: var(--sentient-accent, #4285f4);
    --sheet-cell-range: rgba(66, 133, 244, 0.1);
}

* {
    box-sizing: border-box;
}

/* =============================================================================
   MAIN LAYOUT
   ============================================================================= */

.sheet-app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
    font-family: var(
        --sentient-font-family,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        sans-serif
    );
    overflow: hidden;
}

/* =============================================================================
   TOOLBAR
   ============================================================================= */

.sheet-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--sentient-bg-primary, #ffffff);
    border-bottom: 1px solid var(--sentient-border, #e0e0e0);
    gap: 16px;
    flex-shrink: 0;
    min-height: 52px;
}

.toolbar-left,
.toolbar-center,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.toolbar-left {
    flex: 0 0 auto;
    min-width: 200px;
}

.toolbar-center {
    flex: 1;
    justify-content: flex-start;
    overflow-x: auto;
    padding: 4px 0;
}

.toolbar-center::-webkit-scrollbar {
    height: 4px;
}

.toolbar-center::-webkit-scrollbar-thumb {
    background: var(--sentient-border, #e0e0e0);
    border-radius: 2px;
}

.toolbar-right {
    flex: 0 0 auto;
    gap: 12px;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 4px;
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--sentient-border, #e0e0e0);
    margin: 0 8px;
    flex-shrink: 0;
}

.sheet-name-input {
    border: 1px solid transparent;
    background: transparent;
    font-size: 16px;
    font-weight: 500;
    color: var(--sentient-text-primary, #212121);
    padding: 6px 10px;
    border-radius: var(--sentient-radius-sm, 4px);
    width: 100%;
    max-width: 250px;
    transition: all 0.2s ease;
}

.sheet-name-input:hover {
    background: var(--sentient-bg-secondary, #f5f5f5);
}

.sheet-name-input:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
    background: var(--sentient-bg-primary, #ffffff);
}

/* =============================================================================
   BUTTONS
   ============================================================================= */

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--sentient-text-secondary, #666);
    border-radius: var(--sentient-radius-sm, 4px);
    cursor: pointer;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.btn-icon:hover {
    background: var(--sentient-bg-secondary, #f5f5f5);
    color: var(--sentient-text-primary, #212121);
}

.btn-icon.active {
    background: var(--sentient-accent, #4285f4);
    color: white;
}

.btn-icon svg {
    width: 16px;
    height: 16px;
}

.btn-icon strong,
.btn-icon em,
.btn-icon u,
.btn-icon s {
    font-size: 14px;
    line-height: 1;
}

.btn-primary {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--sentient-accent, #4285f4);
    color: white;
    border: none;
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.btn-primary:hover {
    background: var(--sentient-accent-hover, #3367d6);
}

.btn-secondary {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: transparent;
    color: var(--sentient-text-primary, #212121);
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-secondary:hover {
    background: var(--sentient-bg-secondary, #f5f5f5);
}

/* =============================================================================
   TOOLBAR SELECTS & COLORS
   ============================================================================= */

.toolbar-select {
    padding: 6px 8px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
    font-size: 13px;
    cursor: pointer;
    transition: border-color 0.15s ease;
}

.toolbar-select:hover {
    border-color: var(--sentient-text-muted, #999);
}

.toolbar-select:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.font-family {
    width: 110px;
}

.font-size {
    width: 60px;
}

.color-btn {
    position: relative;
    overflow: visible;
}

.color-letter {
    font-weight: 600;
    font-size: 14px;
}

.color-indicator {
    position: absolute;
    bottom: 4px;
    left: 6px;
    right: 6px;
    height: 3px;
    background: #000000;
    border-radius: 1px;
}

.bg-indicator {
    background: #ffff00;
}

.color-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* =============================================================================
   COLLABORATORS
   ============================================================================= */

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

.collaborator-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--sentient-bg-primary, #ffffff);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    color: white;
    margin-left: -8px;
}

.collaborator-avatar:first-child {
    margin-left: 0;
}

/* =============================================================================
   MAIN CONTENT AREA
   ============================================================================= */

.sheet-main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sheet-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* =============================================================================
   FORMULA BAR
   ============================================================================= */

.formula-bar {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    background: var(--sentient-bg-primary, #ffffff);
    border-bottom: 1px solid var(--sentient-border, #e0e0e0);
    gap: 12px;
    flex-shrink: 0;
}

.cell-address {
    min-width: 60px;
    padding: 4px 8px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 13px;
    font-weight: 500;
    font-family: monospace;
    text-align: center;
    color: var(--sentient-text-primary, #212121);
}

.formula-icon {
    color: var(--sentient-text-muted, #999);
    font-style: italic;
    font-weight: 500;
    font-size: 14px;
}

.formula-input {
    flex: 1;
    padding: 6px 10px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 13px;
    font-family: monospace;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
    transition: border-color 0.15s ease;
}

.formula-input:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.formula-input::placeholder {
    color: var(--sentient-text-muted, #999);
}

/* =============================================================================
   GRID CONTAINER
   ============================================================================= */

.sheet-grid-container {
    flex: 1;
    overflow: auto;
    position: relative;
    background: var(--sentient-bg-secondary, #f8f9fa);
}

.sheet-grid {
    display: grid;
    grid-template-columns: 50px 1fr;
    grid-template-rows: 28px 1fr;
    min-width: max-content;
    min-height: 100%;
}

.grid-corner {
    background: var(--sheet-header-bg);
    border-right: 1px solid var(--sheet-grid-border);
    border-bottom: 1px solid var(--sheet-grid-border);
    position: sticky;
    top: 0;
    left: 0;
    z-index: 30;
}

/* =============================================================================
   COLUMN HEADERS
   ============================================================================= */

.column-headers {
    display: flex;
    position: sticky;
    top: 0;
    z-index: 20;
    background: var(--sheet-header-bg);
}

.column-header {
    min-width: 100px;
    width: 100px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 1px solid var(--sheet-grid-border);
    border-bottom: 1px solid var(--sheet-grid-border);
    font-size: 12px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    user-select: none;
    cursor: pointer;
    transition: background 0.1s ease;
    position: relative;
}

.column-header:hover {
    background: var(--sentient-bg-hover, #e8e8e8);
}

.column-header.selected {
    background: var(--sheet-cell-selected);
    color: white;
}

.column-resize {
    position: absolute;
    right: -3px;
    top: 0;
    bottom: 0;
    width: 6px;
    cursor: col-resize;
    z-index: 10;
}

.column-resize:hover {
    background: var(--sheet-cell-selected);
}

/* =============================================================================
   ROW HEADERS
   ============================================================================= */

.row-headers {
    display: flex;
    flex-direction: column;
    position: sticky;
    left: 0;
    z-index: 20;
    background: var(--sheet-header-bg);
}

.row-header {
    width: 50px;
    min-height: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 1px solid var(--sheet-grid-border);
    border-bottom: 1px solid var(--sheet-grid-border);
    font-size: 12px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    user-select: none;
    cursor: pointer;
    transition: background 0.1s ease;
}

.row-header:hover {
    background: var(--sentient-bg-hover, #e8e8e8);
}

.row-header.selected {
    background: var(--sheet-cell-selected);
    color: white;
}

/* =============================================================================
   CELLS
   ============================================================================= */

.cells-container {
    position: relative;
    background: var(--sentient-bg-primary, #ffffff);
}

.cells {
    display: grid;
    grid-template-columns: repeat(26, 100px);
    grid-auto-rows: 24px;
}

.cell {
    min-width: 100px;
    width: 100px;
    height: 24px;
    padding: 0 6px;
    display: flex;
    align-items: center;
    border-right: 1px solid var(--sheet-grid-border);
    border-bottom: 1px solid var(--sheet-grid-border);
    font-size: 13px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: cell;
    transition: background 0.05s ease;
}

.cell:hover {
    background: var(--sentient-bg-hover, #f5f5f5);
}

.cell.selected {
    outline: 2px solid var(--sheet-cell-selected);
    outline-offset: -1px;
    z-index: 5;
}

.cell.in-range {
    background: var(--sheet-cell-range);
}

.cell.editing {
    padding: 0;
    overflow: visible;
}

.cell-input {
    width: 100%;
    height: 100%;
    border: none;
    outline: 2px solid var(--sheet-cell-selected);
    padding: 0 6px;
    font-size: 13px;
    font-family: inherit;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
}

/* =============================================================================
   SELECTION & INDICATORS
   ============================================================================= */

.selection-box {
    position: absolute;
    border: 2px solid var(--sheet-cell-selected);
    background: var(--sheet-cell-range);
    pointer-events: none;
    z-index: 10;
    display: none;
}

.copy-box {
    position: absolute;
    border: 2px dashed var(--sheet-cell-selected);
    pointer-events: none;
    z-index: 11;
}

.copy-box.hidden {
    display: none;
}

.autofill-handle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--sheet-cell-selected);
    border: 1px solid var(--sentient-bg-primary, #ffffff);
    cursor: crosshair;
    z-index: 15;
    display: none;
}

.cursor-indicators {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 20;
}

.cursor-indicator {
    position: absolute;
    border: 2px solid;
    pointer-events: none;
}

.cursor-label {
    position: absolute;
    top: -20px;
    left: 0;
    padding: 2px 6px;
    font-size: 11px;
    color: white;
    border-radius: 3px;
    white-space: nowrap;
}

/* =============================================================================
   SHEET TABS
   ============================================================================= */

.sheet-tabs-container {
    display: flex;
    align-items: center;
    padding: 0 12px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    border-top: 1px solid var(--sentient-border, #e0e0e0);
    height: 36px;
    flex-shrink: 0;
    gap: 4px;
}

.sheet-tabs {
    display: flex;
    align-items: center;
    gap: 2px;
    overflow-x: auto;
    flex: 1;
}

.sheet-tabs::-webkit-scrollbar {
    height: 0;
}

.sheet-tab {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: var(--sentient-bg-primary, #ffffff);
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-bottom: none;
    border-radius: 6px 6px 0 0;
    font-size: 13px;
    color: var(--sentient-text-secondary, #666);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.sheet-tab:hover {
    background: var(--sentient-bg-hover, #e8e8e8);
}

.sheet-tab.active {
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
    border-color: var(--sentient-border, #e0e0e0);
    border-bottom-color: var(--sentient-bg-primary, #ffffff);
    margin-bottom: -1px;
    font-weight: 500;
}

.tab-menu-btn {
    padding: 2px 4px;
    background: transparent;
    border: none;
    font-size: 10px;
    color: var(--sentient-text-muted, #999);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.sheet-tab:hover .tab-menu-btn {
    opacity: 1;
}

.btn-add-sheet {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    background: var(--sentient-bg-primary, #ffffff);
    border-radius: var(--sentient-radius-sm, 4px);
    color: var(--sentient-text-secondary, #666);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-add-sheet:hover {
    background: var(--sentient-bg-hover, #e8e8e8);
    color: var(--sentient-text-primary, #212121);
}

/* =============================================================================
   STATUS BAR
   ============================================================================= */

.sheet-status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 16px;
    background: var(--sentient-bg-primary, #ffffff);
    border-top: 1px solid var(--sentient-border, #e0e0e0);
    font-size: 12px;
    color: var(--sentient-text-secondary, #666);
    height: 28px;
    flex-shrink: 0;
}

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

.zoom-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-zoom {
    width: 24px;
    height: 24px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    background: var(--sentient-bg-primary, #ffffff);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    font-weight: 600;
    color: var(--sentient-text-secondary, #666);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-zoom:hover {
    background: var(--sentient-bg-secondary, #f5f5f5);
    color: var(--sentient-text-primary, #212121);
}

/* =============================================================================
   CHAT PANEL
   ============================================================================= */

.chat-panel {
    width: 320px;
    display: flex;
    flex-direction: column;
    background: var(--sentient-bg-primary, #ffffff);
    border-left: 1px solid var(--sentient-border, #e0e0e0);
    flex-shrink: 0;
    transition:
        width 0.3s ease,
        opacity 0.3s ease;
}

.chat-panel.collapsed {
    width: 0;
    opacity: 0;
    overflow: hidden;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--sentient-border, #e0e0e0);
}

.chat-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(
        135deg,
        var(--sentient-accent, #4285f4),
        #8e44ad
    );
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.chat-title h3 {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--sentient-text-primary, #212121);
}

.chat-status {
    font-size: 12px;
    color: var(--sentient-text-muted, #999);
}

.chat-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--sentient-text-muted, #999);
    border-radius: var(--sentient-radius-sm, 4px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.chat-close:hover {
    background: var(--sentient-bg-secondary, #f5f5f5);
    color: var(--sentient-text-primary, #212121);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-message {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-message.user {
    align-items: flex-end;
}

.chat-message.assistant {
    align-items: flex-start;
}

.message-bubble {
    max-width: 90%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 13px;
    line-height: 1.5;
}

.chat-message.user .message-bubble {
    background: var(--sentient-accent, #4285f4);
    color: white;
    border-bottom-right-radius: 4px;
}

.chat-message.assistant .message-bubble {
    background: var(--sentient-bg-secondary, #f5f5f5);
    color: var(--sentient-text-primary, #212121);
    border-bottom-left-radius: 4px;
}

.message-bubble p {
    margin: 0 0 8px 0;
}

.message-bubble p:last-child {
    margin-bottom: 0;
}

.message-bubble ul {
    margin: 8px 0 0 0;
    padding-left: 20px;
}

.message-bubble li {
    margin: 4px 0;
}

.chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 16px;
    border-top: 1px solid var(--sentient-border, #e0e0e0);
}

.suggestion-btn {
    padding: 6px 12px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: 16px;
    font-size: 12px;
    color: var(--sentient-text-secondary, #666);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.suggestion-btn:hover {
    background: var(--sentient-bg-hover, #e8e8e8);
    color: var(--sentient-text-primary, #212121);
    border-color: var(--sentient-accent, #4285f4);
}

.chat-input-container {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--sentient-border, #e0e0e0);
}

.chat-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: 20px;
    font-size: 13px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
    transition: border-color 0.15s ease;
}

.chat-input:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.chat-input::placeholder {
    color: var(--sentient-text-muted, #999);
}

.chat-send {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--sentient-accent, #4285f4);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease;
    flex-shrink: 0;
}

.chat-send:hover {
    background: var(--sentient-accent-hover, #3367d6);
}

.chat-toggle {
    position: relative;
}

.chat-toggle.has-notification::after {
    content: "";
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    background: #ea4335;
    border-radius: 50%;
}

/* =============================================================================
   CONTEXT MENU
   ============================================================================= */

.context-menu {
    position: fixed;
    background: var(--sentient-bg-primary, #ffffff);
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-md, 8px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 180px;
    padding: 6px 0;
    z-index: 1000;
}

.context-menu.hidden {
    display: none;
}

.context-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    font-size: 13px;
    color: var(--sentient-text-primary, #212121);
    cursor: pointer;
    transition: background 0.1s ease;
}

.context-item:hover {
    background: var(--sentient-bg-secondary, #f5f5f5);
}

.context-item .shortcut {
    font-size: 11px;
    color: var(--sentient-text-muted, #999);
}

.context-divider {
    height: 1px;
    background: var(--sentient-border, #e0e0e0);
    margin: 6px 0;
}

/* =============================================================================
   MODALS
   ============================================================================= */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.2s ease;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--sentient-bg-primary, #ffffff);
    border-radius: var(--sentient-radius-lg, 12px);
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-content.modal-large {
    max-width: 600px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--sentient-border, #e0e0e0);
}

.modal-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--sentient-text-primary, #212121);
}

.btn-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--sentient-text-muted, #999);
    border-radius: var(--sentient-radius-sm, 4px);
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.btn-close:hover {
    background: var(--sentient-bg-secondary, #f5f5f5);
    color: var(--sentient-text-primary, #212121);
}

.modal-body {
    padding: 20px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--sentient-border, #e0e0e0);
}

/* Share Modal */
.share-input-group {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.share-input-group input,
.share-input-group select {
    padding: 10px 12px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
}

.share-input-group input {
    flex: 1;
}

.share-input-group input:focus,
.share-input-group select:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.share-link-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--sentient-border, #e0e0e0);
}

.share-link-section h4 {
    margin: 0 0 12px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--sentient-text-primary, #212121);
}

.share-link-group {
    display: flex;
    gap: 8px;
}

.share-link-group input {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 13px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    color: var(--sentient-text-secondary, #666);
}

/* Chart Modal */
.chart-type-selector {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.chart-type-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    border: 2px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-md, 8px);
    color: var(--sentient-text-secondary, #666);
    cursor: pointer;
    transition: all 0.15s ease;
}

.chart-type-btn:hover {
    border-color: var(--sentient-accent, #4285f4);
    color: var(--sentient-accent, #4285f4);
}

.chart-type-btn.active {
    border-color: var(--sentient-accent, #4285f4);
    background: rgba(66, 133, 244, 0.1);
    color: var(--sentient-accent, #4285f4);
}

.chart-type-btn span {
    font-size: 12px;
    font-weight: 500;
}

.chart-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chart-options label {
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-primary, #212121);
}

.chart-options input {
    padding: 10px 12px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
}

.chart-options input:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

/* =============================================================================
   RESPONSIVE
   ============================================================================= */

@media (max-width: 1024px) {
    .chat-panel {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 320px;
        z-index: 100;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    }

    .chat-panel.collapsed {
        transform: translateX(100%);
        width: 320px;
    }
}

@media (max-width: 768px) {
    .toolbar-center {
        display: none;
    }

    .sheet-name-input {
        max-width: 150px;
    }

    .btn-primary span {
        display: none;
    }

    .chat-panel {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .sheet-toolbar {
        padding: 6px 10px;
    }

    .toolbar-right {
        gap: 6px;
    }

    .btn-primary {
        padding: 8px 12px;
    }
}

/* =============================================================================
   PRINT
   ============================================================================= */

@media print {
    .sheet-toolbar,
    .formula-bar,
    .sheet-tabs-container,
    .sheet-status-bar,
    .chat-panel,
    .context-menu,
    .modal {
        display: none !important;
    }

    .sheet-app {
        height: auto;
    }

    .sheet-main {
        display: block;
    }

    .sheet-content {
        display: block;
    }

    .sheet-grid-container {
        overflow: visible;
    }

    .cell {
        background: white !important;
        color: black !important;
        border-color: #ccc !important;
    }
}

/* =============================================================================
   CHARTS & IMAGES DISPLAY
   ============================================================================= */

.charts-container,
.images-container {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 10;
}

.chart-wrapper {
    position: absolute;
    background: var(--sentient-bg-primary, #ffffff);
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-md, 8px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    pointer-events: auto;
    overflow: hidden;
}

.chart-wrapper:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.chart-wrapper.selected {
    border-color: var(--sentient-accent, #4285f4);
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    border-bottom: 1px solid var(--sentient-border, #e0e0e0);
    cursor: move;
}

.chart-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-primary, #212121);
    margin: 0;
}

.chart-actions {
    display: flex;
    gap: 4px;
}

.chart-actions button {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--sentient-text-secondary, #666);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-actions button:hover {
    background: var(--sentient-bg-tertiary, #e0e0e0);
}

.chart-content {
    padding: 16px;
    min-height: 200px;
}

.chart-canvas {
    width: 100%;
    height: 100%;
}

.chart-bar-container {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 100%;
    padding: 8px;
    gap: 8px;
}

.chart-bar {
    flex: 1;
    background: var(--sentient-accent, #4285f4);
    border-radius: 4px 4px 0 0;
    min-width: 20px;
    max-width: 60px;
    transition: height 0.3s ease;
}

.chart-bar:nth-child(2) {
    background: #34a853;
}

.chart-bar:nth-child(3) {
    background: #fbbc04;
}

.chart-bar:nth-child(4) {
    background: #ea4335;
}

.chart-bar:nth-child(5) {
    background: #9c27b0;
}

.chart-line-container {
    position: relative;
    height: 100%;
    padding: 8px;
}

.chart-line {
    fill: none;
    stroke: var(--sentient-accent, #4285f4);
    stroke-width: 2;
}

.chart-line-point {
    fill: var(--sentient-accent, #4285f4);
}

.chart-pie-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 16px;
    border-top: 1px solid var(--sentient-border, #e0e0e0);
    font-size: 11px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.image-wrapper {
    position: absolute;
    border: 1px solid transparent;
    border-radius: var(--sentient-radius-sm, 4px);
    pointer-events: auto;
    cursor: move;
    overflow: hidden;
}

.image-wrapper:hover {
    border-color: var(--sentient-border, #e0e0e0);
}

.image-wrapper.selected {
    border-color: var(--sentient-accent, #4285f4);
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
}

.image-resize-handle {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--sentient-accent, #4285f4);
    border: 2px solid white;
    border-radius: 50%;
    cursor: se-resize;
    bottom: -5px;
    right: -5px;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.image-wrapper:hover .image-resize-handle,
.image-wrapper.selected .image-resize-handle {
    opacity: 1;
}

/* =============================================================================
   FIND & REPLACE MODAL
   ============================================================================= */

.find-replace-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.find-replace-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
}

.find-replace-group input {
    padding: 10px 12px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
}

.find-replace-group input:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.find-replace-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--sentient-text-primary, #212121);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--sentient-accent, #4285f4);
}

.find-results {
    padding: 10px 12px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 13px;
    color: var(--sentient-text-secondary, #666);
    margin-bottom: 16px;
}

/* =============================================================================
   CONDITIONAL FORMATTING MODAL
   ============================================================================= */

.cf-section {
    margin-bottom: 16px;
}

.cf-section label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    margin-bottom: 6px;
}

.cf-section input,
.cf-section select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
}

.cf-section input:focus,
.cf-section select:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.cf-values {
    display: flex;
    gap: 12px;
}

.cf-values input {
    flex: 1;
}

.cf-style-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.cf-style-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.cf-style-row label {
    margin-bottom: 0;
    min-width: 80px;
}

.cf-style-row input[type="color"] {
    width: 40px;
    height: 32px;
    padding: 2px;
    cursor: pointer;
}

.cf-style-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--sentient-accent, #4285f4);
}

.cf-preview {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--sentient-border, #e0e0e0);
}

.cf-preview label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    margin-bottom: 8px;
}

.cf-preview-cell {
    width: 120px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    background: #ffeb3b;
}

/* =============================================================================
   DATA VALIDATION MODAL
   ============================================================================= */

.dv-tabs {
    display: flex;
    border-bottom: 1px solid var(--sentient-border, #e0e0e0);
    margin-bottom: 16px;
}

.dv-tab {
    padding: 10px 16px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    cursor: pointer;
    transition: all 0.15s ease;
}

.dv-tab:hover {
    color: var(--sentient-text-primary, #212121);
}

.dv-tab.active {
    color: var(--sentient-accent, #4285f4);
    border-bottom-color: var(--sentient-accent, #4285f4);
}

.dv-tab-content {
    display: none;
}

.dv-tab-content.active {
    display: block;
}

.dv-section {
    margin-bottom: 16px;
}

.dv-section label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    margin-bottom: 6px;
}

.dv-section input,
.dv-section select,
.dv-section textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
    font-family: inherit;
}

.dv-section input:focus,
.dv-section select:focus,
.dv-section textarea:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.dv-section textarea {
    min-height: 80px;
    resize: vertical;
}

.dv-value-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
}

.dv-list {
    margin-top: 12px;
}

/* =============================================================================
   PRINT PREVIEW MODAL
   ============================================================================= */

.modal-fullscreen {
    width: 95vw;
    max-width: 1400px;
    height: 90vh;
    display: flex;
    flex-direction: column;
}

.modal-fullscreen .modal-header {
    flex-shrink: 0;
}

.modal-fullscreen .modal-body {
    flex: 1;
    overflow: hidden;
    padding: 0;
}

.print-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    margin: 0 24px;
}

.print-toolbar select {
    padding: 6px 10px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 13px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
}

.print-toolbar .checkbox-label {
    font-size: 12px;
}

.print-preview-body {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background: var(--sentient-bg-tertiary, #e0e0e0);
    overflow: auto;
    padding: 24px;
}

.print-preview-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.print-page {
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 48px;
}

.print-page.portrait {
    width: 8.5in;
    min-height: 11in;
}

.print-page.landscape {
    width: 11in;
    min-height: 8.5in;
}

.print-content {
    width: 100%;
    overflow: hidden;
}

.print-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 10pt;
}

.print-content td,
.print-content th {
    border: 1px solid #ccc;
    padding: 4px 8px;
    text-align: left;
}

.print-content th {
    background: #f5f5f5;
    font-weight: 600;
}

/* =============================================================================
   CUSTOM NUMBER FORMAT MODAL
   ============================================================================= */

.cnf-section {
    margin-bottom: 16px;
}

.cnf-section label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    margin-bottom: 6px;
}

.cnf-section input,
.cnf-section select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
}

.cnf-section input:focus,
.cnf-section select:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.cnf-preview {
    padding: 12px 16px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 16px;
    font-family: monospace;
    text-align: right;
}

.cnf-formats-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    max-height: 180px;
    overflow-y: auto;
}

.cnf-format-item {
    padding: 10px 12px;
    background: var(--sentient-bg-secondary, #f5f5f5);
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 13px;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s ease;
}

.cnf-format-item:hover {
    border-color: var(--sentient-accent, #4285f4);
    background: var(--sentient-bg-primary, #ffffff);
}

.cnf-format-item.selected {
    border-color: var(--sentient-accent, #4285f4);
    background: rgba(66, 133, 244, 0.1);
}

/* =============================================================================
   INSERT IMAGE MODAL
   ============================================================================= */

.img-tabs {
    display: flex;
    border-bottom: 1px solid var(--sentient-border, #e0e0e0);
    margin-bottom: 16px;
}

.img-tab {
    padding: 10px 16px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    cursor: pointer;
    transition: all 0.15s ease;
}

.img-tab:hover {
    color: var(--sentient-text-primary, #212121);
}

.img-tab.active {
    color: var(--sentient-accent, #4285f4);
    border-bottom-color: var(--sentient-accent, #4285f4);
}

.img-tab-content {
    display: none;
}

.img-tab-content.active {
    display: block;
}

.img-section {
    margin-bottom: 16px;
}

.img-section label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    margin-bottom: 6px;
}

.img-section input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-sm, 4px);
    font-size: 14px;
    background: var(--sentient-bg-primary, #ffffff);
    color: var(--sentient-text-primary, #212121);
}

.img-section input:focus {
    outline: none;
    border-color: var(--sentient-accent, #4285f4);
}

.img-drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px;
    border: 2px dashed var(--sentient-border, #e0e0e0);
    border-radius: var(--sentient-radius-md, 8px);
    color: var(--sentient-text-secondary, #666);
    transition: all 0.15s ease;
}

.img-drop-zone:hover,
.img-drop-zone.dragover {
    border-color: var(--sentient-accent, #4285f4);
    background: rgba(66, 133, 244, 0.05);
}

.img-drop-zone p {
    margin: 0;
    font-size: 14px;
}

.img-preview-container {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--sentient-border, #e0e0e0);
}

.img-preview-container label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--sentient-text-secondary, #666);
    margin-bottom: 8px;
}

.img-preview-container img {
    max-width: 100%;
    max-height: 200px;
    border-radius: var(--sentient-radius-sm, 4px);
    border: 1px solid var(--sentient-border, #e0e0e0);
}

/* =============================================================================
   NUMBER FORMAT SELECT
   ============================================================================= */

.number-format {
    min-width: 140px;
}

/* =============================================================================
   UTILITY CLASSES
   ============================================================================= */

.hidden {
    display: none !important;
}