.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

#canvasContainer {
    position: relative;
    margin: 20px auto;
    max-width: 100%;
}

#mainCanvas {
    max-width: 100%;
    border: 1px solid #ccc;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}