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<!DOCTYPE html>
<html lang="es">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Excel Clone Avanzado</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        .cell.selected {
            box-shadow: inset 0 0 0 2px #3b82f6;
        }
        .cell.editing {
            background-color: #1e293b;
            box-shadow: inset 0 0 0 2px #10b981;
        }
        .column-resize-handle {
            position: absolute;
            right: -2px;
            top: 0;
            width: 4px;
            height: 100%;
            background-color: transparent;
            cursor: col-resize;
            z-index: 10;
        }
        .row-resize-handle {
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 4px;
            background-color: transparent;
            cursor: row-resize;
            z-index: 10;
        }
        .scroll-shadow-right {
            box-shadow: inset -10px 0 8px -8px rgba(0, 0, 0, 0.4);
        }
        .scroll-shadow-bottom {
            box-shadow: inset 0 -10px 8px -8px rgba(0, 0, 0, 0.4);
        }
        .tab-active {
            border-bottom: 2px solid #3b82f6;
            color: #3b82f6;
        }
        .format-button.active {
            background-color: #374151;
        }
        .color-preview {
            width: 16px;
            height: 16px;
            display: inline-block;
            border: 1px solid #6b7280;
            vertical-align: middle;
            margin-left: 4px;
        }
    </style>
</head>
<body class="bg-gray-800 text-gray-100 h-screen flex flex-col overflow-hidden">
    <!-- Toolbar Superior -->
    <div class="bg-gray-900 p-2 flex items-center border-b border-gray-700">
        <!-- Archivo -->
        <div class="relative group">
            <button id="file-menu" class="px-3 py-1 rounded hover:bg-gray-700 text-blue-400 font-medium">
                <i class="fas fa-file mr-1"></i> Archivo
            </button>
            <div class="absolute hidden group-hover:block bg-gray-800 border border-gray-700 rounded shadow-lg z-20 w-48">
                <button id="new-file" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-green-400">
                    <i class="fas fa-file-circle-plus mr-2"></i> Nuevo
                </button>
                <button id="open-file" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-yellow-400">
                    <i class="fas fa-folder-open mr-2"></i> Abrir
                </button>
                <button id="save-file" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-purple-400">
                    <i class="fas fa-save mr-2"></i> Guardar
                </button>
                <div class="border-t border-gray-700"></div>
                <button id="export-pdf" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-red-400">
                    <i class="fas fa-file-pdf mr-2"></i> Exportar PDF
                </button>
            </div>
        </div>

        <!-- Edición -->
        <div class="relative group ml-2">
            <button class="px-3 py-1 rounded hover:bg-gray-700 text-green-400 font-medium">
                <i class="fas fa-edit mr-1"></i> Edición
            </button>
            <div class="absolute hidden group-hover:block bg-gray-800 border border-gray-700 rounded shadow-lg z-20 w-48">
                <button id="undo" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-blue-400">
                    <i class="fas fa-undo mr-2"></i> Deshacer
                </button>
                <button id="redo" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-purple-400">
                    <i class="fas fa-redo mr-2"></i> Rehacer
                </button>
                <div class="border-t border-gray-700"></div>
                <button id="cut" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-yellow-400">
                    <i class="fas fa-cut mr-2"></i> Cortar
                </button>
                <button id="copy" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-pink-400">
                    <i class="fas fa-copy mr-2"></i> Copiar
                </button>
                <button id="paste" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-indigo-400">
                    <i class="fas fa-paste mr-2"></i> Pegar
                </button>
                <div class="border-t border-gray-700"></div>
                <button id="clear-contents" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-red-400">
                    <i class="fas fa-eraser mr-2"></i> Limpiar contenido
                </button>
                <button id="clear-formats" class="block w-full text-left px-4 py-2 hover:bg-gray-700 text-orange-400">
                    <i class="fas fa-remove-format mr-2"></i> Limpiar formato
                </button>
            </div>
        </div>

        <!-- Formato -->
        <div class="flex items-center space-x-2 ml-4">
            <select id="font-family" class="bg-gray-800 border border-gray-700 rounded px-2 py-1 text-sm text-white hover:bg-gray-700">
                <option>Calibri</option>
                <option>Arial</option>
                <option>Times New Roman</option>
                <option>Courier New</option>
                <option>Verdana</option>
            </select>
            <select id="font-size" class="bg-gray-800 border border-gray-700 rounded px-2 py-1 text-sm text-white hover:bg-gray-700">
                <option>8</option>
                <option>10</option>
                <option>11</option>
                <option selected>12</option>
                <option>14</option>
                <option>16</option>
                <option>18</option>
                <option>20</option>
                <option>24</option>
            </select>
            <button id="bold" class="p-2 rounded hover:bg-gray-700 text-pink-400 format-button">
                <i class="fas fa-bold"></i>
            </button>
            <button id="italic" class="p-2 rounded hover:bg-gray-700 text-red-400 format-button">
                <i class="fas fa-italic"></i>
            </button>
            <button id="underline" class="p-2 rounded hover:bg-gray-700 text-orange-400 format-button">
                <i class="fas fa-underline"></i>
            </button>
            <div class="border-l border-gray-700 h-6 mx-1"></div>
            <button id="align-left" class="p-2 rounded hover:bg-gray-700 text-cyan-400 format-button">
                <i class="fas fa-align-left"></i>
            </button>
            <button id="align-center" class="p-2 rounded hover:bg-gray-700 text-emerald-400 format-button">
                <i class="fas fa-align-center"></i>
            </button>
            <button id="align-right" class="p-2 rounded hover:bg-gray-700 text-blue-400 format-button">
                <i class="fas fa-align-right"></i>
            </button>
            <div class="border-l border-gray-700 h-6 mx-1"></div>
            <div class="relative">
                <button id="text-color" class="p-2 rounded hover:bg-gray-700 text-yellow-400 flex items-center">
                    <i class="fas fa-font"></i>
                    <span id="text-color-preview" class="color-preview"></span>
                </button>
            </div>
            <div class="relative">
                <button id="fill-color" class="p-2 rounded hover:bg-gray-700 text-green-400 flex items-center">
                    <i class="fas fa-fill-drip"></i>
                    <span id="fill-color-preview" class="color-preview"></span>
                </button>
            </div>
            <button id="border-style" class="p-2 rounded hover:bg-gray-700 text-purple-400">
                <i class="fas fa-border-all"></i>
            </button>
            <button id="remove-colors" class="p-2 rounded hover:bg-gray-700 text-red-400">
                <i class="fas fa-palette"></i> <i class="fas fa-slash"></i>
            </button>
        </div>

        <!-- Fórmulas y Datos -->
        <div class="ml-auto flex items-center space-x-2">
            <button id="insert-function" class="px-3 py-1 rounded hover:bg-gray-700 text-indigo-400">
                <i class="fas fa-sigma mr-1"></i> Fx
            </button>
            <button id="sort-asc" class="p-2 rounded hover:bg-gray-700 text-blue-400">
                <i class="fas fa-sort-amount-up"></i>
            </button>
            <button id="sort-desc" class="p-2 rounded hover:bg-gray-700 text-red-400">
                <i class="fas fa-sort-amount-down"></i>
            </button>
            <button id="filter" class="p-2 rounded hover:bg-gray-700 text-rose-400">
                <i class="fas fa-filter"></i>
            </button>
            <button id="chart" class="p-2 rounded hover:bg-gray-700 text-green-400">
                <i class="fas fa-chart-line"></i>
            </button>
        </div>
    </div>
    
    <!-- Pestañas de Hojas -->
    <div class="bg-gray-900 p-1 flex items-center border-b border-gray-700">
        <button id="add-sheet" class="px-2 py-1 rounded hover:bg-gray-700 text-green-400">
            <i class="fas fa-plus"></i>
        </button>
        <div class="flex ml-2 overflow-x-auto">
            <button class="px-3 py-1 rounded-l hover:bg-gray-700 text-sm font-medium tab-active">
                Hoja1
            </button>
            <button class="px-3 py-1 hover:bg-gray-700 text-sm font-medium text-gray-400">
                Hoja2
            </button>
            <button class="px-3 py-1 rounded-r hover:bg-gray-700 text-sm font-medium text-gray-400">
                Hoja3
            </button>
        </div>
    </div>
    
    <!-- Formula Bar -->
    <div class="bg-gray-900 p-1 flex items-center border-b border-gray-700">
        <div id="cell-reference" class="w-16 text-center text-sm font-mono text-blue-400">A1</div>
        <div class="flex-1 flex">
            <input type="text" id="formula-input" class="bg-gray-800 border border-gray-700 rounded-l px-2 py-1 text-sm w-full font-mono focus:outline-none focus:ring-1 focus:ring-blue-500" placeholder="Introduce fórmula...">
            <button id="apply-formula" class="bg-blue-600 hover:bg-blue-700 px-3 rounded-r">
                <i class="fas fa-check"></i>
            </button>
        </div>
        <div class="ml-2 text-xs text-gray-400">
            <span id="formula-help">F2 para editar celda, Enter para confirmar</span>
        </div>
    </div>
    
    <!-- Main Grid -->
    <div class="flex-1 flex overflow-hidden">
        <!-- Row Numbers -->
        <div class="bg-gray-900 border-r border-gray-700 overflow-hidden" id="row-numbers">
            <div class="w-10 h-8 flex items-center justify-center text-xs text-gray-400 border-b border-gray-700"></div>
            <!-- Rows will be added dynamically -->
        </div>
        
        <!-- Column Headers + Grid -->
        <div class="flex-1 flex flex-col overflow-hidden">
            <!-- Column Headers -->
            <div class="bg-gray-900 border-b border-gray-700 flex" id="column-headers">
                <!-- Columns will be added dynamically -->
            </div>
            
            <!-- Grid Container -->
            <div class="flex-1 overflow-auto relative scroll-shadow-right scroll-shadow-bottom" id="grid-container">
                <div id="grid" class="absolute"></div>
            </div>
        </div>
    </div>
    
    <!-- Status Bar -->
    <div class="bg-gray-900 p-1 flex items-center border-t border-gray-700 text-xs">
        <div class="flex space-x-4">
            <span id="status" class="text-green-400">Listo</span>
            <span id="num-lock" class="text-yellow-400 hidden">NUM</span>
            <span id="caps-lock" class="text-blue-400 hidden">MAYÚS</span>
            <span id="selection-info" class="text-purple-400">1 celda seleccionada</span>
        </div>
        <div class="ml-auto flex space-x-2">
            <span class="text-pink-400">Zoom: 100%</span>
            <button id="zoom-out" class="text-pink-400 hover:bg-gray-700 px-1 rounded">-</button>
            <button id="zoom-in" class="text-pink-400 hover:bg-gray-700 px-1 rounded">+</button>
            <button id="zoom-reset" class="text-pink-400 hover:bg-gray-700 px-1 rounded">100%</button>
        </div>
    </div>

    <!-- Color Picker (hidden by default) -->
    <div id="color-picker" class="hidden absolute bg-gray-800 border border-gray-700 rounded shadow-lg p-2 z-50">
        <div class="grid grid-cols-8 gap-1">
            <div class="w-4 h-4 bg-red-500 hover:border hover:border-white cursor-pointer" data-color="#ef4444"></div>
            <div class="w-4 h-4 bg-orange-500 hover:border hover:border-white cursor-pointer" data-color="#f97316"></div>
            <div class="w-4 h-4 bg-yellow-500 hover:border hover:border-white cursor-pointer" data-color="#eab308"></div>
            <div class="w-4 h-4 bg-green-500 hover:border hover:border-white cursor-pointer" data-color="#22c55e"></div>
            <div class="w-4 h-4 bg-emerald-500 hover:border hover:border-white cursor-pointer" data-color="#10b981"></div>
            <div class="w-4 h-4 bg-cyan-500 hover:border hover:border-white cursor-pointer" data-color="#06b6d4"></div>
            <div class="w-4 h-4 bg-blue-500 hover:border hover:border-white cursor-pointer" data-color="#3b82f6"></div>
            <div class="w-4 h-4 bg-indigo-500 hover:border hover:border-white cursor-pointer" data-color="#6366f1"></div>
            <div class="w-4 h-4 bg-purple-500 hover:border hover:border-white cursor-pointer" data-color="#8b5cf6"></div>
            <div class="w-4 h-4 bg-pink-500 hover:border hover:border-white cursor-pointer" data-color="#ec4899"></div>
            <div class="w-4 h-4 bg-rose-500 hover:border hover:border-white cursor-pointer" data-color="#f43f5e"></div>
            <div class="w-4 h-4 bg-amber-500 hover:border hover:border-white cursor-pointer" data-color="#f59e0b"></div>
            <div class="w-4 h-4 bg-lime-500 hover:border hover:border-white cursor-pointer" data-color="#84cc16"></div>
            <div class="w-4 h-4 bg-teal-500 hover:border hover:border-white cursor-pointer" data-color="#14b8a6"></div>
            <div class="w-4 h-4 bg-sky-500 hover:border hover:border-white cursor-pointer" data-color="#0ea5e9"></div>
            <div class="w-4 h-4 bg-violet-500 hover:border hover:border-white cursor-pointer" data-color="#8b5cf6"></div>
        </div>
        <div class="mt-2 flex justify-between">
            <button id="color-picker-cancel" class="px-2 py-1 text-xs bg-gray-700 rounded hover:bg-gray-600">Cancelar</button>
            <button id="color-picker-apply" class="px-2 py-1 text-xs bg-blue-600 rounded hover:bg-blue-700">Aplicar</button>
            <button id="color-picker-remove" class="px-2 py-1 text-xs bg-red-600 rounded hover:bg-red-700">Quitar</button>
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', function() {
            // Configuration
            const ROWS = 50;
            const COLS = 26;
            const CELL_WIDTH = 100;
            const CELL_HEIGHT = 25;
            const HEADER_HEIGHT = 25;
            
            // State
            let selectedCell = null;
            let editingCell = null;
            let data = {};
            let formulas = {};
            let cellWidths = {};
            let cellHeights = {};
            let cellStyles = {};
            let activeSheet = 'Hoja1';
            let sheets = {
                'Hoja1': { data: {}, formulas: {}, cellStyles: {} },
                'Hoja2': { data: {}, formulas: {}, cellStyles: {} },
                'Hoja3': { data: {}, formulas: {}, cellStyles: {} }
            };
            let history = [];
            let historyIndex = -1;
            let isBold = false;
            let isItalic = false;
            let isUnderline = false;
            let textAlign = 'left';
            let currentColorPickerType = null;
            let defaultTextColor = '#ffffff'; // Blanco
            let defaultFillColor = 'transparent'; // Transparente
            
            // DOM Elements
            const grid = document.getElementById('grid');
            const gridContainer = document.getElementById('grid-container');
            const columnHeaders = document.getElementById('column-headers');
            const rowNumbers = document.getElementById('row-numbers');
            const formulaInput = document.getElementById('formula-input');
            const cellReference = document.getElementById('cell-reference');
            const statusElement = document.getElementById('status');
            const selectionInfo = document.getElementById('selection-info');
            const colorPicker = document.getElementById('color-picker');
            const numLockElement = document.getElementById('num-lock');
            const capsLockElement = document.getElementById('caps-lock');
            const textColorPreview = document.getElementById('text-color-preview');
            const fillColorPreview = document.getElementById('fill-color-preview');
            
            // Initialize grid
            function initGrid() {
                // Set grid dimensions
                grid.style.width = `${COLS * CELL_WIDTH}px`;
                grid.style.height = `${ROWS * CELL_HEIGHT}px`;
                
                // Create column headers (A, B, C...)
                for (let col = 0; col < COLS; col++) {
                    const colHeader = document.createElement('div');
                    const colLetter = String.fromCharCode(65 + col);
                    colHeader.className = 'h-8 flex items-center justify-center text-xs text-gray-400 border-b border-gray-700 relative';
                    colHeader.style.width = `${CELL_WIDTH}px`;
                    colHeader.textContent = colLetter;
                    
                    // Add resize handle
                    const resizeHandle = document.createElement('div');
                    resizeHandle.className = 'column-resize-handle';
                    resizeHandle.dataset.col = col;
                    resizeHandle.addEventListener('mousedown', startColumnResize);
                    colHeader.appendChild(resizeHandle);
                    
                    columnHeaders.appendChild(colHeader);
                }
                
                // Create row numbers (1, 2, 3...)
                for (let row = 1; row <= ROWS; row++) {
                    const rowNumber = document.createElement('div');
                    rowNumber.className = 'w-10 h-8 flex items-center justify-center text-xs text-gray-400 border-b border-gray-700 relative';
                    rowNumber.textContent = row;
                    
                    // Add resize handle
                    const resizeHandle = document.createElement('div');
                    resizeHandle.className = 'row-resize-handle';
                    resizeHandle.dataset.row = row - 1;
                    resizeHandle.addEventListener('mousedown', startRowResize);
                    rowNumber.appendChild(resizeHandle);
                    
                    rowNumbers.appendChild(rowNumber);
                }
                
                // Create cells
                for (let row = 0; row < ROWS; row++) {
                    for (let col = 0; col < COLS; col++) {
                        const cell = document.createElement('div');
                        const cellId = `${String.fromCharCode(65 + col)}${row + 1}`;
                        
                        cell.className = 'cell absolute bg-gray-800 border border-gray-700 p-1 overflow-hidden text-sm';
                        cell.style.width = `${CELL_WIDTH}px`;
                        cell.style.height = `${CELL_HEIGHT}px`;
                        cell.style.left = `${col * CELL_WIDTH}px`;
                        cell.style.top = `${row * CELL_HEIGHT}px`;
                        cell.dataset.row = row;
                        cell.dataset.col = col;
                        cell.dataset.id = cellId;
                        
                        cell.addEventListener('click', handleCellClick);
                        cell.addEventListener('dblclick', handleCellDoubleClick);
                        
                        grid.appendChild(cell);
                    }
                }
                
                // Set default color previews
                textColorPreview.style.backgroundColor = defaultTextColor;
                fillColorPreview.style.backgroundColor = defaultFillColor;
                
                // Add initial state to history
                saveState();
            }
            
            // Handle cell click
            function handleCellClick(e) {
                const cell = e.currentTarget;
                const cellId = cell.dataset.id;
                
                // Remove previous selection
                if (selectedCell) {
                    selectedCell.classList.remove('selected');
                }
                
                // Set new selection
                selectedCell = cell;
                cell.classList.add('selected');
                
                // Update formula bar
                formulaInput.value = formulas[cellId] || data[cellId] || '';
                formulaInput.focus();
                
                // Update cell reference
                cellReference.textContent = cellId;
                
                // Update selection info
                selectionInfo.textContent = "1 celda seleccionada";
                
                // Update status
                statusElement.textContent = "Listo";
                
                // Update format buttons based on cell style
                updateFormatButtons(cellId);
            }
            
            // Update format buttons based on cell style
            function updateFormatButtons(cellId) {
                // Reset all format buttons
                document.querySelectorAll('.format-button').forEach(btn => btn.classList.remove('active'));
                
                if (cellStyles[cellId]) {
                    const style = cellStyles[cellId];
                    
                    // Bold
                    if (style.bold) {
                        document.getElementById('bold').classList.add('active');
                    }
                    
                    // Italic
                    if (style.italic) {
                        document.getElementById('italic').classList.add('active');
                    }
                    
                    // Underline
                    if (style.underline) {
                        document.getElementById('underline').classList.add('active');
                    }
                    
                    // Text align
                    if (style.textAlign) {
                        document.getElementById(`align-${style.textAlign}`).classList.add('active');
                    }
                    
                    // Update color previews
                    if (style.color) {
                        textColorPreview.style.backgroundColor = style.color;
                    } else {
                        textColorPreview.style.backgroundColor = defaultTextColor;
                    }
                    
                    if (style.backgroundColor) {
                        fillColorPreview.style.backgroundColor = style.backgroundColor;
                    } else {
                        fillColorPreview.style.backgroundColor = defaultFillColor;
                    }
                }
            }
            
            // Handle cell double click (edit mode)
            function handleCellDoubleClick(e) {
                const cell = e.currentTarget;
                const cellId = cell.dataset.id;
                
                // Exit previous edit mode
                if (editingCell) {
                    exitEditMode();
                }
                
                // Enter edit mode
                editingCell = cell;
                cell.classList.add('editing');
                
                // Create input element
                const input = document.createElement('input');
                input.type = 'text';
                input.className = 'w-full h-full bg-gray-800 text-white px-1 outline-none';
                input.value = data[cellId] || '';
                input.dataset.cellId = cellId;
                
                // Apply cell styles to input
                if (cellStyles[cellId]) {
                    if (cellStyles[cellId].bold) input.style.fontWeight = 'bold';
                    if (cellStyles[cellId].italic) input.style.fontStyle = 'italic';
                    if (cellStyles[cellId].underline) input.style.textDecoration = 'underline';
                    if (cellStyles[cellId].textAlign) input.style.textAlign = cellStyles[cellId].textAlign;
                    if (cellStyles[cellId].color) input.style.color = cellStyles[cellId].color;
                    if (cellStyles[cellId].backgroundColor) input.style.backgroundColor = cellStyles[cellId].backgroundColor;
                    if (cellStyles[cellId].fontSize) input.style.fontSize = cellStyles[cellId].fontSize + 'px';
                    if (cellStyles[cellId].fontFamily) input.style.fontFamily = cellStyles[cellId].fontFamily;
                }
                
                // Clear cell content and add input
                cell.innerHTML = '';
                cell.appendChild(input);
                input.focus();
                
                // Handle input events
                input.addEventListener('blur', handleInputBlur);
                input.addEventListener('keydown', handleInputKeyDown);
                
                // Update status
                statusElement.textContent = "Editando";
            }
            
            // Exit edit mode
            function exitEditMode() {
                if (!editingCell) return;
                
                const cell = editingCell;
                const cellId = cell.dataset.id;
                const input = cell.querySelector('input');
                
                if (input) {
                    // Save data
                    const value = input.value.trim();
                    if (value.startsWith('=')) {
                        formulas[cellId] = value;
                        try {
                            data[cellId] = evaluateFormula(value.substring(1));
                        } catch (e) {
                            data[cellId] = '#ERROR!';
                        }
                    } else {
                        data[cellId] = value;
                        delete formulas[cellId];
                    }
                    
                    // Update cell display
                    cell.innerHTML = '';
                    cell.textContent = data[cellId] || '';
                    
                    // Apply styles
                    applyCellStyles(cell, cellId);
                }
                
                cell.classList.remove('editing');
                editingCell = null;
                
                // Save state to history
                saveState();
                
                // Update status
                statusElement.textContent = "Listo";
            }
            
            // Apply cell styles
            function applyCellStyles(cell, cellId) {
                // Reset to defaults first
                cell.style = '';
                cell.className = 'cell absolute bg-gray-800 border border-gray-700 p-1 overflow-hidden text-sm';
                
                if (cellStyles[cellId]) {
                    const style = cellStyles[cellId];
                    if (style.bold) cell.style.fontWeight = 'bold';
                    if (style.italic) cell.style.fontStyle = 'italic';
                    if (style.underline) cell.style.textDecoration = 'underline';
                    if (style.textAlign) cell.style.textAlign = style.textAlign;
                    if (style.color) cell.style.color = style.color;
                    if (style.backgroundColor) cell.style.backgroundColor = style.backgroundColor;
                    if (style.fontSize) cell.style.fontSize = style.fontSize + 'px';
                    if (style.fontFamily) cell.style.fontFamily = style.fontFamily;
                }
                
                // Update color previews
                updateColorPreviews(cellId);
            }
            
            // Update color previews
            function updateColorPreviews(cellId) {
                if (cellStyles[cellId]) {
                    if (cellStyles[cellId].color) {
                        textColorPreview.style.backgroundColor = cellStyles[cellId].color;
                    } else {
                        textColorPreview.style.backgroundColor = defaultTextColor;
                    }
                    
                    if (cellStyles[cellId].backgroundColor) {
                        fillColorPreview.style.backgroundColor = cellStyles[cellId].backgroundColor;
                    } else {
                        fillColorPreview.style.backgroundColor = defaultFillColor;
                    }
                } else {
                    textColorPreview.style.backgroundColor = defaultTextColor;
                    fillColorPreview.style.backgroundColor = defaultFillColor;
                }
            }
            
            // Handle input blur (exit edit mode)
            function handleInputBlur(e) {
                exitEditMode();
            }
            
            // Handle input key events
            function handleInputKeyDown(e) {
                if (e.key === 'Enter') {
                    exitEditMode();
                } else if (e.key === 'Escape') {
                    const input = e.currentTarget;
                    const cell = input.parentElement;
                    
                    // Restore original content
                    cell.innerHTML = '';
                    cell.textContent = data[cell.dataset.id] || '';
                    applyCellStyles(cell, cell.dataset.id);
                    
                    cell.classList.remove('editing');
                    editingCell = null;
                    
                    // Update status
                    statusElement.textContent = "Listo";
                }
            }
            
            // Simple formula evaluation (very basic implementation)
            function evaluateFormula(formula) {
                // Basic SUM implementation
                if (formula.toUpperCase().startsWith('SUM(')) {
                    const range = formula.match(/\((.*?)\)/)[1];
                    const [start, end] = range.split(':');
                    
                    let sum = 0;
                    const startCol = start.charCodeAt(0) - 65;
                    const startRow = parseInt(start.substring(1)) - 1;
                    const endCol = end.charCodeAt(0) - 65;
                    const endRow = parseInt(end.substring(1)) - 1;
                    
                    for (let row = startRow; row <= endRow; row++) {
                        for (let col = startCol; col <= endCol; col++) {
                            const cellId = `${String.fromCharCode(65 + col)}${row + 1}`;
                            const value = parseFloat(data[cellId]) || 0;
                            sum += value;
                        }
                    }
                    
                    return sum;
                }
                
                // Basic arithmetic
                if (formula.includes('+')) {
                    const parts = formula.split('+');
                    return (parseFloat(parts[0]) || 0) + (parseFloat(parts[1]) || 0);
                }
                if (formula.includes('-')) {
                    const parts = formula.split('-');
                    return (parseFloat(parts[0]) || 0) - (parseFloat(parts[1]) || 0);
                }
                if (formula.includes('*')) {
                    const parts = formula.split('*');
                    return (parseFloat(parts[0]) || 0) * (parseFloat(parts[1]) || 0);
                }
                if (formula.includes('/')) {
                    const parts = formula.split('/');
                    return (parseFloat(parts[0]) || 0) / (parseFloat(parts[1]) || 1);
                }
                
                // Cell reference
                if (/^[A-Z]+\d+$/.test(formula)) {
                    return data[formula] || 0;
                }
                
                return formula; // Return as is if not a recognized formula
            }
            
            // Handle column resize
            let isResizingColumn = false;
            let resizingCol = null;
            let startX = 0;
            let startWidth = 0;
            
            function startColumnResize(e) {
                e.preventDefault();
                e.stopPropagation();
                
                isResizingColumn = true;
                resizingCol = parseInt(e.currentTarget.dataset.col);
                startX = e.clientX;
                startWidth = CELL_WIDTH;
                
                document.addEventListener('mousemove', handleColumnResize);
                document.addEventListener('mouseup', stopColumnResize);
                
                // Update status
                statusElement.textContent = "Redimensionando columna";
            }
            
            function handleColumnResize(e) {
                if (!isResizingColumn) return;
                
                const dx = e.clientX - startX;
                const newWidth = Math.max(30, startWidth + dx);
                
                // Update column width
                const colLetter = String.fromCharCode(65 + resizingCol);
                cellWidths[colLetter] = newWidth;
                
                // Update header
                columnHeaders.children[resizingCol].style.width = `${newWidth}px`;
                
                // Update all cells in this column
                const cells = document.querySelectorAll(`.cell[data-col="${resizingCol}"]`);
                cells.forEach(cell => {
                    cell.style.width = `${newWidth}px`;
                });
                
                // Update grid width
                updateGridDimensions();
            }
            
            function stopColumnResize() {
                isResizingColumn = false;
                document.removeEventListener('mousemove', handleColumnResize);
                document.removeEventListener('mouseup', stopColumnResize);
                
                // Save state to history
                saveState();
                
                // Update status
                statusElement.textContent = "Listo";
            }
            
            // Handle row resize
            let isResizingRow = false;
            let resizingRow = null;
            let startY = 0;
            let startHeight = 0;
            
            function startRowResize(e) {
                e.preventDefault();
                e.stopPropagation();
                
                isResizingRow = true;
                resizingRow = parseInt(e.currentTarget.dataset.row);
                startY = e.clientY;
                startHeight = CELL_HEIGHT;
                
                document.addEventListener('mousemove', handleRowResize);
                document.addEventListener('mouseup', stopRowResize);
                
                // Update status
                statusElement.textContent = "Redimensionando fila";
            }
            
            function handleRowResize(e) {
                if (!isResizingRow) return;
                
                const dy = e.clientY - startY;
                const newHeight = Math.max(20, startHeight + dy);
                
                // Update row height
                cellHeights[resizingRow + 1] = newHeight;
                
                // Update row number display
                rowNumbers.children[resizingRow + 1].style.height = `${newHeight}px`;
                
                // Update all cells in this row
                const cells = document.querySelectorAll(`.cell[data-row="${resizingRow}"]`);
                cells.forEach(cell => {
                    cell.style.height = `${newHeight}px`;
                });
                
                // Update grid height
                updateGridDimensions();
            }
            
            function stopRowResize() {
                isResizingRow = false;
                document.removeEventListener('mousemove', handleRowResize);
                document.removeEventListener('mouseup', stopRowResize);
                
                // Save state to history
                saveState();
                
                // Update status
                statusElement.textContent = "Listo";
            }
            
            // Update grid dimensions after resize
            function updateGridDimensions() {
                let totalWidth = 0;
                for (let col = 0; col < COLS; col++) {
                    const colLetter = String.fromCharCode(65 + col);
                    totalWidth += cellWidths[colLetter] || CELL_WIDTH;
                }
                
                let totalHeight = 0;
                for (let row = 0; row < ROWS; row++) {
                    totalHeight += cellHeights[row + 1] || CELL_HEIGHT;
                }
                
                grid.style.width = `${totalWidth}px`;
                grid.style.height = `${totalHeight}px`;
            }
            
            // Handle formula input
            formulaInput.addEventListener('keydown', function(e) {
                if (e.key === 'Enter' && selectedCell) {
                    const value = formulaInput.value.trim();
                    const cellId = selectedCell.dataset.id;
                    
                    if (value.startsWith('=')) {
                        formulas[cellId] = value;
                        try {
                            data[cellId] = evaluateFormula(value.substring(1));
                        } catch (e) {
                            data[cellId] = '#ERROR!';
                        }
                    } else {
                        data[cellId] = value;
                        delete formulas[cellId];
                    }
                    
                    selectedCell.textContent = data[cellId] || '';
                    formulaInput.blur();
                    
                    // Save state to history
                    saveState();
                }
            });
            
            // Apply formula button
            document.getElementById('apply-formula').addEventListener('click', function() {
                if (selectedCell) {
                    const value = formulaInput.value.trim();
                    const cellId = selectedCell.dataset.id;
                    
                    if (value.startsWith('=')) {
                        formulas[cellId] = value;
                        try {
                            data[cellId] = evaluateFormula(value.substring(1));
                        } catch (e) {
                            data[cellId] = '#ERROR!';
                        }
                    } else {
                        data[cellId] = value;
                        delete formulas[cellId];
                    }
                    
                    selectedCell.textContent = data[cellId] || '';
                    
                    // Save state to history
                    saveState();
                }
            });
            
            // Format buttons
            document.getElementById('bold').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    // Initialize cell style if not exists
                    if (!cellStyles[cellId]) {
                        cellStyles[cellId] = {};
                    }
                    
                    // Toggle bold
                    cellStyles[cellId].bold = !cellStyles[cellId].bold;
                    selectedCell.style.fontWeight = cellStyles[cellId].bold ? 'bold' : 'normal';
                    
                    // Toggle active class
                    this.classList.toggle('active');
                    
                    // Save state to history
                    saveState();
                }
            });
            
            document.getElementById('italic').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (!cellStyles[cellId]) {
                        cellStyles[cellId] = {};
                    }
                    
                    cellStyles[cellId].italic = !cellStyles[cellId].italic;
                    selectedCell.style.fontStyle = cellStyles[cellId].italic ? 'italic' : 'normal';
                    
                    this.classList.toggle('active');
                    saveState();
                }
            });
            
            document.getElementById('underline').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (!cellStyles[cellId]) {
                        cellStyles[cellId] = {};
                    }
                    
                    cellStyles[cellId].underline = !cellStyles[cellId].underline;
                    selectedCell.style.textDecoration = cellStyles[cellId].underline ? 'underline' : 'none';
                    
                    this.classList.toggle('active');
                    saveState();
                }
            });
            
            // Alignment buttons
            document.getElementById('align-left').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (!cellStyles[cellId]) {
                        cellStyles[cellId] = {};
                    }
                    
                    cellStyles[cellId].textAlign = 'left';
                    selectedCell.style.textAlign = 'left';
                    
                    // Update active state
                    document.querySelectorAll('.format-button').forEach(btn => btn.classList.remove('active'));
                    this.classList.add('active');
                    
                    saveState();
                }
            });
            
            document.getElementById('align-center').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (!cellStyles[cellId]) {
                        cellStyles[cellId] = {};
                    }
                    
                    cellStyles[cellId].textAlign = 'center';
                    selectedCell.style.textAlign = 'center';
                    
                    document.querySelectorAll('.format-button').forEach(btn => btn.classList.remove('active'));
                    this.classList.add('active');
                    
                    saveState();
                }
            });
            
            document.getElementById('align-right').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (!cellStyles[cellId]) {
                        cellStyles[cellId] = {};
                    }
                    
                    cellStyles[cellId].textAlign = 'right';
                    selectedCell.style.textAlign = 'right';
                    
                    document.querySelectorAll('.format-button').forEach(btn => btn.classList.remove('active'));
                    this.classList.add('active');
                    
                    saveState();
                }
            });
            
            // Font family change
            document.getElementById('font-family').addEventListener('change', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (!cellStyles[cellId]) {
                        cellStyles[cellId] = {};
                    }
                    
                    cellStyles[cellId].fontFamily = this.value;
                    selectedCell.style.fontFamily = this.value;
                    
                    saveState();
                }
            });
            
            // Font size change
            document.getElementById('font-size').addEventListener('change', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (!cellStyles[cellId]) {
                        cellStyles[cellId] = {};
                    }
                    
                    cellStyles[cellId].fontSize = parseInt(this.value);
                    selectedCell.style.fontSize = this.value + 'px';
                    
                    saveState();
                }
            });
            
            // Text color button
            document.getElementById('text-color').addEventListener('click', function(e) {
                currentColorPickerType = 'text';
                showColorPicker(e.currentTarget);
            });
            
            // Fill color button
            document.getElementById('fill-color').addEventListener('click', function(e) {
                currentColorPickerType = 'background';
                showColorPicker(e.currentTarget);
            });
            
            // Remove colors button
            document.getElementById('remove-colors').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (cellStyles[cellId]) {
                        // Remove color properties
                        delete cellStyles[cellId].color;
                        delete cellStyles[cellId].backgroundColor;
                        
                        // Apply changes
                        applyCellStyles(selectedCell, cellId);
                        
                        // Save state
                        saveState();
                        
                        // Update status
                        statusElement.textContent = "Colores eliminados";
                        setTimeout(() => statusElement.textContent = "Listo", 2000);
                    }
                }
            });
            
            // Show color picker
            function showColorPicker(target) {
                const rect = target.getBoundingClientRect();
                colorPicker.style.top = `${rect.bottom + 5}px`;
                colorPicker.style.left = `${rect.left}px`;
                colorPicker.classList.remove('hidden');
            }
            
            // Color picker selection
            colorPicker.querySelectorAll('[data-color]').forEach(color => {
                color.addEventListener('click', function() {
                    const selectedColor = this.dataset.color;
                    
                    if (selectedCell && currentColorPickerType) {
                        const cellId = selectedCell.dataset.id;
                        
                        if (!cellStyles[cellId]) {
                            cellStyles[cellId] = {};
                        }
                        
                        if (currentColorPickerType === 'text') {
                            cellStyles[cellId].color = selectedColor;
                            selectedCell.style.color = selectedColor;
                            textColorPreview.style.backgroundColor = selectedColor;
                        } else {
                            cellStyles[cellId].backgroundColor = selectedColor;
                            selectedCell.style.backgroundColor = selectedColor;
                            fillColorPreview.style.backgroundColor = selectedColor;
                        }
                        
                        saveState();
                    }
                    
                    colorPicker.classList.add('hidden');
                });
            });
            
            // Color picker remove
            document.getElementById('color-picker-remove').addEventListener('click', function() {
                if (selectedCell && currentColorPickerType) {
                    const cellId = selectedCell.dataset.id;
                    
                    if (cellStyles[cellId]) {
                        if (currentColorPickerType === 'text') {
                            delete cellStyles[cellId].color;
                            selectedCell.style.color = '';
                            textColorPreview.style.backgroundColor = defaultTextColor;
                        } else {
                            delete cellStyles[cellId].backgroundColor;
                            selectedCell.style.backgroundColor = '';
                            fillColorPreview.style.backgroundColor = defaultFillColor;
                        }
                        
                        saveState();
                    }
                }
                
                colorPicker.classList.add('hidden');
            });
            
            // Color picker cancel
            document.getElementById('color-picker-cancel').addEventListener('click', function() {
                colorPicker.classList.add('hidden');
            });
            
            // Clear contents button
            document.getElementById('clear-contents').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    // Clear data and formulas but keep formatting
                    delete data[cellId];
                    delete formulas[cellId];
                    
                    selectedCell.textContent = '';
                    
                    // Save state
                    saveState();
                    
                    // Update status
                    statusElement.textContent = "Contenido eliminado";
                    setTimeout(() => statusElement.textContent = "Listo", 2000);
                }
            });
            
            // Clear formats button
            document.getElementById('clear-formats').addEventListener('click', function() {
                if (selectedCell) {
                    const cellId = selectedCell.dataset.id;
                    
                    // Remove all formatting
                    delete cellStyles[cellId];
                    
                    // Reset cell styles
                    selectedCell.style = '';
                    selectedCell.className = 'cell absolute bg-gray-800 border border-gray-700 p-1 overflow-hidden text-sm selected';
                    
                    // Reset color previews
                    textColorPreview.style.backgroundColor = defaultTextColor;
                    fillColorPreview.style.backgroundColor = defaultFillColor;
                    
                    // Reset format buttons
                    document.querySelectorAll('.format-button').forEach(btn => btn.classList.remove('active'));
                    
                    // Save state
                    saveState();
                    
                    // Update status
                    statusElement.textContent = "Formato eliminado";
                    setTimeout(() => statusElement.textContent = "Listo", 2000);
                }
            });
            
            // File operations
            document.getElementById('new-file').addEventListener('click', function() {
                if (confirm('¿Crear nuevo archivo? Se perderán los cambios no guardados.')) {
                    // Reset all data
                    data = {};
                    formulas = {};
                    cellStyles = {};
                    cellWidths = {};
                    cellHeights = {};
                    
                    // Clear all cells
                    document.querySelectorAll('.cell').forEach(cell => {
                        cell.textContent = '';
                        cell.style = '';
                        cell.className = 'cell absolute bg-gray-800 border border-gray-700 p-1 overflow-hidden text-sm';
                    });
                    
                    // Reset column widths
                    for (let col = 0; col < COLS; col++) {
                        columnHeaders.children[col].style.width = `${CELL_WIDTH}px`;
                        document.querySelectorAll(`.cell[data-col="${col}"]`).forEach(cell => {
                            cell.style.width = `${CELL_WIDTH}px`;
                        });
                    }
                    
                    // Reset row heights
                    for (let row = 0; row < ROWS; row++) {
                        rowNumbers.children[row + 1].style.height = `${CELL_HEIGHT}px`;
                        document.querySelectorAll(`.cell[data-row="${row}"]`).forEach(cell => {
                            cell.style.height = `${CELL_HEIGHT}px`;
                        });
                    }
                    
                    // Reset grid dimensions
                    grid.style.width = `${COLS * CELL_WIDTH}px`;
                    grid.style.height = `${ROWS * CELL_HEIGHT}px`;
                    
                    // Reset formula bar
                    formulaInput.value = '';
                    cellReference.textContent = 'A1';
                    
                    // Reset color previews
                    textColorPreview.style.backgroundColor = defaultTextColor;
                    fillColorPreview.style.backgroundColor = defaultFillColor;
                    
                    // Reset format buttons
                    document.querySelectorAll('.format-button').forEach(btn => btn.classList.remove('active'));
                    
                    // Save state
                    saveState();
                    
                    // Update status
                    statusElement.textContent = "Nuevo archivo creado";
                    setTimeout(() => statusElement.textContent = "Listo", 2000);
                }
            });
            
            document.getElementById('save-file').addEventListener('click', function() {
                // In a real app, this would save to server or download file
                const excelData = {
                    data: data,
                    formulas: formulas,
                    cellStyles: cellStyles,
                    cellWidths: cellWidths,
                    cellHeights: cellHeights
                };
                
                console.log('Datos a guardar:', excelData);
                statusElement.textContent = "Archivo guardado (consola)";
                setTimeout(() => statusElement.textContent = "Listo", 2000);
            });
            
            document.getElementById('export-pdf').addEventListener('click', function() {
                // In a real app, this would generate a PDF
                statusElement.textContent = "Exportando a PDF...";
                setTimeout(() => {
                    statusElement.textContent = "PDF generado (simulado)";
                    setTimeout(() => statusElement.textContent = "Listo", 2000);
                }, 1000);
            });
            
            // Edit operations
            document.getElementById('undo').addEventListener('click', undo);
            document.getElementById('redo').addEventListener('click', redo);
            document.getElementById('cut').addEventListener('click', cut);
            document.getElementById('copy').addEventListener('click', copy);
            document.getElementById('paste').addEventListener('click', paste);
            
            let clipboard = null;
            
            function cut() {
                if (selectedCell) {
                    copy();
                    data[selectedCell.dataset.id] = '';
                    selectedCell.textContent = '';
                    saveState();
                    statusElement.textContent = "Texto cortado";
                }
            }
            
            function copy() {
                if (selectedCell) {
                    clipboard = {
                        value: data[selectedCell.dataset.id] || '',
                        style: cellStyles[selectedCell.dataset.id] || null
                    };
                    statusElement.textContent = "Texto copiado";
                }
            }
            
            function paste() {
                if (selectedCell && clipboard) {
                    const cellId = selectedCell.dataset.id;
                    data[cellId] = clipboard.value;
                    
                    if (clipboard.style) {
                        cellStyles[cellId] = {...clipboard.style};
                        applyCellStyles(selectedCell, cellId);
                    }
                    
                    selectedCell.textContent = data[cellId] || '';
                    saveState();
                    statusElement.textContent = "Texto pegado";
                }
            }
            
            // Save state to history
            function saveState() {
                // Truncate history if we're not at the end
                if (historyIndex < history.length - 1) {
                    history = history.slice(0, historyIndex + 1);
                }
                
                // Save current state
                history.push({
                    data: {...data},
                    formulas: {...formulas},
                    cellStyles: {...cellStyles},
                    cellWidths: {...cellWidths},
                    cellHeights: {...cellHeights}
                });
                
                historyIndex = history.length - 1;
                
                // Limit history size
                if (history.length > 50) {
                    history.shift();
                    historyIndex--;
                }
            }
            
            // Undo
            function undo() {
                if (historyIndex > 0) {
                    historyIndex--;
                    restoreState();
                    statusElement.textContent = "Deshacer";
                }
            }
            
            // Redo
            function redo() {
                if (historyIndex < history.length - 1) {
                    historyIndex++;
                    restoreState();
                    statusElement.textContent = "Rehacer";
                }
            }
            
            // Restore state from history
            function restoreState() {
                const state = history[historyIndex];
                
                data = {...state.data};
                formulas = {...state.formulas};
                cellStyles = {...state.cellStyles};
                cellWidths = {...state.cellWidths};
                cellHeights = {...state.cellHeights};
                
                // Update all cells
                document.querySelectorAll('.cell').forEach(cell => {
                    const cellId = cell.dataset.id;
                    cell.textContent = data[cellId] || '';
                    applyCellStyles(cell, cellId);
                });
                
                // Update column widths
                for (let col = 0; col < COLS; col++) {
                    const colLetter = String.fromCharCode(65 + col);
                    const width = cellWidths[colLetter] || CELL_WIDTH;
                    columnHeaders.children[col].style.width = `${width}px`;
                    
                    const cells = document.querySelectorAll(`.cell[data-col="${col}"]`);
                    cells.forEach(cell => {
                        cell.style.width = `${width}px`;
                    });
                }
                
                // Update row heights
                for (let row = 0; row < ROWS; row++) {
                    const height = cellHeights[row + 1] || CELL_HEIGHT;
                    rowNumbers.children[row + 1].style.height = `${height}px`;
                    
                    const cells = document.querySelectorAll(`.cell[data-row="${row}"]`);
                    cells.forEach(cell => {
                        cell.style.height = `${height}px`;
                    });
                }
                
                // Update grid dimensions
                updateGridDimensions();
                
                // Update color previews
                if (selectedCell) {
                    updateColorPreviews(selectedCell.dataset.id);
                    updateFormatButtons(selectedCell.dataset.id);
                }
            }
            
            // Insert function button
            document.getElementById('insert-function').addEventListener('click', function() {
                if (selectedCell) {
                    formulaInput.value = '=SUM(';
                    formulaInput.focus();
                    statusElement.textContent = "Insertando función SUM";
                }
            });
            
            // Sort buttons
            document.getElementById('sort-asc').addEventListener('click', function() {
                statusElement.textContent = "Orden ascendente (simulado)";
            });
            
            document.getElementById('sort-desc').addEventListener('click', function() {
                statusElement.textContent = "Orden descendente (simulado)";
            });
            
            // Filter button
            document.getElementById('filter').addEventListener('click', function() {
                statusElement.textContent = "Filtro aplicado (simulado)";
            });
            
            // Chart button
            document.getElementById('chart').addEventListener('click', function() {
                statusElement.textContent = "Creando gráfico (simulado)";
                setTimeout(() => {
                    alert('Gráfico creado (simulación)');
                    statusElement.textContent = "Listo";
                }, 1000);
            });
            
            // Zoom buttons
            document.getElementById('zoom-in').addEventListener('click', function() {
                const currentZoom = parseInt(gridContainer.style.zoom || '100');
                const newZoom = Math.min(currentZoom + 10, 200);
                gridContainer.style.zoom = `${newZoom}%`;
                document.querySelector('.text-pink-400').textContent = `Zoom: ${newZoom}%`;
                statusElement.textContent = `Zoom: ${newZoom}%`;
            });
            
            document.getElementById('zoom-out').addEventListener('click', function() {
                const currentZoom = parseInt(gridContainer.style.zoom || '100');
                const newZoom = Math.max(currentZoom - 10, 50);
                gridContainer.style.zoom = `${newZoom}%`;
                document.querySelector('.text-pink-400').textContent = `Zoom: ${newZoom}%`;
                statusElement.textContent = `Zoom: ${newZoom}%`;
            });
            
            document.getElementById('zoom-reset').addEventListener('click', function() {
                gridContainer.style.zoom = '100%';
                document.querySelector('.text-pink-400').textContent = 'Zoom: 100%';
                statusElement.textContent = 'Zoom: 100%';
            });
            
            // Add sheet button
            document.getElementById('add-sheet').addEventListener('click', function() {
                const sheetButtons = document.querySelectorAll('.tab-active + button, .tab-active');
                const lastSheet = sheetButtons[sheetButtons.length - 1];
                const sheetNumber = parseInt(lastSheet.textContent.replace('Hoja', '')) + 1;
                
                const newSheetButton = document.createElement('button');
                newSheetButton.className = 'px-3 py-1 hover:bg-gray-700 text-sm font-medium text-gray-400';
                newSheetButton.textContent = `Hoja${sheetNumber}`;
                
                lastSheet.parentNode.insertBefore(newSheetButton, lastSheet.nextSibling);
                
                // Add to sheets data
                sheets[`Hoja${sheetNumber}`] = { data: {}, formulas: {}, cellStyles: {} };
                
                statusElement.textContent = `Hoja${sheetNumber} añadida`;
            });
            
            // Sheet tab click
            document.querySelectorAll('[class*="tab-"]').forEach(tab => {
                tab.addEventListener('click', function() {
                    if (!this.classList.contains('tab-active')) {
                        // Switch sheet
                        document.querySelector('.tab-active').classList.remove('tab-active', 'text-blue-400');
                        document.querySelector('.tab-active').classList.add('text-gray-400');
                        
                        this.classList.add('tab-active', 'text-blue-400');
                        this.classList.remove('text-gray-400');
                        
                        // Update active sheet
                        activeSheet = this.textContent.trim();
                        
                        // In a real app, we would load the sheet data
                        statusElement.textContent = `Cambiado a ${activeSheet}`;
                    }
                });
            });
            
            // Detect num lock and caps lock
            document.addEventListener('keydown', function(e) {
                if (e.getModifierState('NumLock')) {
                    numLockElement.classList.remove('hidden');
                } else {
                    numLockElement.classList.add('hidden');
                }
                
                if (e.getModifierState('CapsLock')) {
                    capsLockElement.classList.remove('hidden');
                } else {
                    capsLockElement.classList.add('hidden');
                }
            });
            
            // Initialize
            initGrid();
            
            // Add keyboard navigation
            document.addEventListener('keydown', function(e) {
                if (!selectedCell) return;
                
                const row = parseInt(selectedCell.dataset.row);
                const col = parseInt(selectedCell.dataset.col);
                
                if (e.key === 'ArrowRight' && col < COLS - 1) {
                    const nextCell = document.querySelector(`.cell[data-row="${row}"][data-col="${col + 1}"]`);
                    nextCell.click();
                } else if (e.key === 'ArrowLeft' && col > 0) {
                    const nextCell = document.querySelector(`.cell[data-row="${row}"][data-col="${col - 1}"]`);
                    nextCell.click();
                } else if (e.key === 'ArrowDown' && row < ROWS - 1) {
                    const nextCell = document.querySelector(`.cell[data-row="${row + 1}"][data-col="${col}"]`);
                    nextCell.click();
                } else if (e.key === 'ArrowUp' && row > 0) {
                    const nextCell = document.querySelector(`.cell[data-row="${row - 1}"][data-col="${col}"]`);
                    nextCell.click();
                } else if (e.key === 'Enter') {
                    selectedCell.dispatchEvent(new MouseEvent('dblclick'));
                } else if (e.key === 'F2') {
                    selectedCell.dispatchEvent(new MouseEvent('dblclick'));
                } else if (e.key === 'Tab') {
                    e.preventDefault();
                    if (e.shiftKey && col > 0) {
                        const prevCell = document.querySelector(`.cell[data-row="${row}"][data-col="${col - 1}"]`);
                        prevCell.click();
                    } else if (col < COLS - 1) {
                        const nextCell = document.querySelector(`.cell[data-row="${row}"][data-col="${col + 1}"]`);
                        nextCell.click();
                    }
                }
            });
        });
    </script>
<p style="border-radius: 8px; text-align: center; font-size: 12px; color: #fff; margin-top: 16px;position: fixed; left: 8px; bottom: 8px; z-index: 10; background: rgba(0, 0, 0, 0.8); padding: 4px 8px;">Made with <img src="https://enzostvs-deepsite.hf.space/logo.svg" alt="DeepSite Logo" style="width: 16px; height: 16px; vertical-align: middle;display:inline-block;margin-right:3px;filter:brightness(0) invert(1);"><a href="https://enzostvs-deepsite.hf.space" style="color: #fff;text-decoration: underline;" target="_blank" >DeepSite</a> - 🧬 <a href="https://enzostvs-deepsite.hf.space?remix=LJMolotov/my-multi-notes" style="color: #fff;text-decoration: underline;" target="_blank" >Remix</a></p></body>
</html>