body {
    font-family: Arial, sans-serif;
}

#toolbar {
    background-color: #f0f0f0;
    padding: 10px;
    border-bottom: 1px solid #ccc;
}

#spreadsheet {
    margin: 20px;
    border: 1px solid #ccc;
    padding: 10px;
    min-height: 400px;
}

.cell {
    border: 1px solid #000;
    margin: 5px;
    padding: 5px;
    display: inline-block;
    min-width: 50px;
    min-height: 20px;
}

#drawingCanvas {
    display: none;
    margin-top: 20px;
}