body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    font-family: sans-serif;
}
canvas {
    border: 5px solid #333;
    background-color: #fff;
}
h1 {
    color: #333;
}

#speed-controls {
    margin: 10px 0;
    display: flex;
    gap: 8px;
    align-items: center;
}

button {
    padding: 6px 10px;
    font-size: 14px;
}

/* Simple responsive canvas container */
@media (max-width: 960px) {
    canvas { width: 100%; height: auto; }
}