Flutter: Make Buttons stretch - flutter

Question

I having an issue with a Flutter Widget tree I am building:
I Want the Buttons on the Bottom to be bigger and fill all the available space from the text above to the bottom of the screen.
Here my current Code:
class Body extends StatelessWidget {
#override
Widget build(BuildContext context) {
Size size = MediaQuery.of(context).size;
return SafeArea(
child: Column(
children: [
UpperDetailsContainer(),
TitleAndPrice(),
//The Row below contains the Two Buttons
Expanded(
child: Row(
children: [
Container(
width: size.width / 2,
child: TextButton(
child: Text("Buy Now"),
style: TextButton.styleFrom(
backgroundColor: kPrimaryColor,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(
topRight: Radius.circular(50)
)
)
),
),
),
Container(
width: size.width / 2,
child: TextButton(
child: Text("Description"),
style: TextButton.styleFrom(
backgroundColor: kPrimaryColor,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(50)
)
)
),
),
),
],
),
)
],
),
);
}
}
I have already tried:
Making the upper widgets smaller
Adding Mainaxisaligment.spacebetween to the surrounding column
Adding Crossaxisaligment.stretch to the Row that contains the buttons
Removing SafeArea bottom / SafeArea as a whole
Setting the height for the buttons manually as an absolute value, but I don't really wanna do this for obvious reasons
What else can i do? And where does that grey bottom Stripe come from?

Answer 1

add crossAxisAlignment: CrossAxisAlignment.stretch to the row, so that it fills all available vertical space
note: you need the Expanded widget so that the constraint your row gets, isn't infinite
#override
Widget build(BuildContext context) {
Size size = MediaQuery.of(context).size;
return SafeArea(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
SizedBox(
height: size.height * 0.7,
child: Container(
color: Colors.amber,
),
),
Expanded(
child: Row(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
_buildBuyNowButton(size),
_buildDescriptionButton(size),
],
),
)
],
),
);
}
Runnable example: https://www.dartpad.dev/4f568d8e0a334d23e7211207081356b4?null_safety=true