.tool-whiteboard .wb-toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:12px}
.tool-whiteboard .wb-toolbar label{font-size:13px;color:#666;display:inline-flex;align-items:center;gap:6px}
.tool-whiteboard input[type=color]{width:36px;height:28px;padding:0;border:1px solid #ddd;background:#fff}
.tool-whiteboard .wb-stage{border:1px solid #e5e5e5;background:#fff;overflow:auto;touch-action:none}
.tool-whiteboard #wb-canvas{display:block;width:100%;max-width:960px;height:auto;cursor:crosshair;background:
  linear-gradient(90deg,#f8fafc 1px,transparent 1px) 0 0/20px 20px,
  linear-gradient(#f8fafc 1px,transparent 1px) 0 0/20px 20px,#fff}
@media(max-width:760px){.tool-whiteboard #wb-canvas{max-width:100%}}