body { font-family: monospace; background:#111; color:#eee; }
.panel { width: 90%; max-width:600px; margin: 30px auto; padding:20px; background:#222; border-radius:10px; box-shadow:0 0 20px #000; }
button { margin:5px; padding:10px; border:none; border-radius:5px; background:#f00; color:#fff; cursor:pointer; font-weight:bold; }
button:hover { background:#ff4444; }
.logs { background:#000; padding:10px; border-radius:5px; margin-top:10px; height:200px; overflow:auto; }
canvas { margin-top:20px; background:#111; border-radius:5px; }