body {
    background:#0b0f14;
    color:#e5e7eb;
    font-family:system-ui,sans-serif;
    text-align:center;
    margin:0;
}
canvas {
    background:#020617;
    display:block;
    margin:0 auto;
}
button {
    margin:8px;
    padding:8px 14px;
    border-radius:10px;
    border:none;
    background:#22c55e;
    color:#020617;
    font-weight:600;
}