body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#canvas-container {
    width: 90%;
    height: 80vh;
    background-color: #fff;
    border: 2px solid #ddd;
    overflow: auto;
    position: relative;
}

canvas {
    width: 100%;
    height: 100%;
}

button {
    margin-top: 20px;
    padding: 10px 15px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 4px;
}

button:hover {
    background-color: #45a049;
}