body { margin:0; background:black; overflow:hidden; }
    canvas { display:block; }

    #controls {
      position: fixed;
      bottom: 50px;
      left: 10px;
      background: rgba(0,0,0,0.8);
      color: white;
      padding: 10px;
      border-radius: 8px;
      display: none;
      max-height: 80vh;
      overflow-y: auto;
    }

    #controlToggle {
      position: fixed;
      bottom: 10px;
      left: 10px;
      background: #222;
      color: white;
      border: none;
      border-radius: 50%;
      width: 40px;
      height: 40px;
      font-size: 20px;
      cursor: pointer;
    }

    label { display:block; margin-top:5px; font-size:14px; }
    input, select, button { margin-top:3px; width:100%; }