html,body{margin:0;font-family:system-ui;background:#fafafa;color:#222}
main{max-width:720px;margin:24px auto;padding:12px}
.toolbar{display:flex;gap:8px;align-items:center;margin-bottom:8px}
canvas{background:#fff;border:1px solid #ddd;border-radius:6px;image-rendering:pixelated}
button{padding:.5rem .8rem;border:1px solid #ccc;background:#fff;border-radius:6px;cursor:pointer}
#status{color:#999;}