main {
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

canvas {
    border: 1px solid #ccc;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.controls {
    margin-top: 20px;
}
button {
    font-size: 16px;
    padding: 10px 20px;
    margin: 0 10px;
    cursor: pointer;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #fff;
    transition: background-color 0.3s, box-shadow 0.3s;
}
button:hover {
    background-color: #e9e9e9;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
footer {
    text-align: center;
    padding: 20px;
    background-color: #333;
    color: #fff;
    position: relative;
}