private val shadowPaint = Paint().apply {
    color = Color(0x66000000)
    blendMode = BlendMode.SrcAtop
    isAntiAlias = true
    style = PaintingStyle.Stroke
}

// Stroke 2 shadow
// - The blend mode only works if the calling DrawScope is being drawn in a separate
//   layer, via the modifier call:
//   graphicsLayer { compositingStrategy = CompositingStrategy.Offscreen }
drawIntoCanvas { canvas ->
    // It's important that all of our moving values scale based on the size of the drawing.
    // All of their values should be based on the strokeWidth.
    val shadowXInset = strokeWidth * 0.15f
    val shadowXOutset = strokeWidth * 0.15f
    val shadowStrokeWidth = strokeWidth * 0.2f
    val shadowBlurRadius = strokeWidth * 0.15f

    shadowPaint.strokeWidth = shadowStrokeWidth
    // BlurMaskFilter is read-only, so we need to set it every frame in case the blur radius has changed
    shadowPaint.asFrameworkPaint().maskFilter =
        BlurMaskFilter(shadowBlurRadius, BlurMaskFilter.Blur.NORMAL)

    // Stroke 1 Shadow
    run {
        val bottomLeftX = 0f + ((size.width - strokeWidth - shadowXOutset) * drawPercent)
        canvas.drawLine(
            p1 = Offset(x = 0f + shadowXInset, y = 0f), // Top left
            p2 = Offset(x = bottomLeftX, y = drawHeight), // Bottom left
            paint = shadowPaint,
        )
    }

    // Stroke 3 Shadow
    run {
        val topRight = Offset(x = strokeWidth + shadowXOutset, y = 0f)
        val bottomRightX = topRight.x + ((size.width - topRight.x) * drawPercent) - shadowXInset
        canvas.drawLine(
            p1 = topRight,
            p2 = Offset(x = bottomRightX, y = drawHeight),
            paint = shadowPaint
        )
    }
}