boxShadow: const <BoxShadow>[
          BoxShadow(
            color: Color(0xcc000000),
            offset: Offset(0, 2),
            blurRadius: 4,
          ),
          BoxShadow(
            color: Color(0x80000000),
            offset: Offset(0, 6),
            blurRadius: 20,
          ),
        ], 
      ),
      child: Text(
        'Lorem ipsum',
        style: bold24Roboto,
      ),
    ),
  ),
);

Making circles and ellipses

Making a circle in CSS requires a workaround of applying a
border-radius of 50% to all four sides of a rectangle,
though there are basic shapes.

While this approach is supported
with the borderRadius property of BoxDecoration,
Flutter provides a shape property
with BoxShape enum for this purpose.