#brushWrap{display:flex;gap:12px;align-items:flex-start;padding:12px 12px 16px;max-width:960px;margin:0 auto;}
  #brushCanvasCol{flex:1;min-width:0;}
  #brushLBCol{width:190px;flex-shrink:0;}
  @media(max-width:680px){
    #brushWrap{flex-direction:column;padding:8px 8px 12px;}
    #brushLBCol{width:100%;}
  }
  #g-canvas{display:block;width:100%;border-radius:16px;background:#111;border:none;cursor:none;touch-action:none;will-change:transform;image-rendering:auto;}
  #brushCanvasCol{touch-action:none;}