body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
}

#container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    width: 500px;
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

canvas {
    border: 1px solid #ccc;
    background-color: #eee;
    margin-bottom: 20px;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.controls label {
    font-weight: bold;
}

.controls input[type="range"] {
    width: 80%;
}

button {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    margin-top: 15px;
}