/* Canvas Container */
        .canvas-container {
            flex: 1;
            position: relative;
            overflow: hidden;
            background: var(--canvas-bg);
        }

        #canvas {
            display: block;
            cursor: crosshair;
            background: var(--canvas-bg);
            /* Without this, touch input is treated as page scrolling/zooming */
            touch-action: none;
        }