.tools{margin:15px 0;display:flex;flex-direction:column;gap:10px}.tool-group{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center}button,input{padding:8px 12px;border:1px solid #ddd;border-radius:4px;cursor:pointer}button{background:#f0f0f0;color:#333;transition:all 0.3s;display:flex;align-items:center;gap:5px}button:hover{background:#e0e0e0}button.active{background:#007bff;color:white}#drawingCanvas{border:1px solid #ccc;background:white;cursor:crosshair;width:100%;height:500px;touch-action:none}.grid-enabled{background-image:linear-gradient(#ddd 1px,transparent 1px),linear-gradient(90deg,#ddd 1px,transparent 1px);background-size:20px 20px}