Overlapping InkWells with Stack

main.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: MyWidget(),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Conversation Gallery')),
      backgroundColor: Colors.grey,
      body: Container(
        child: Stack(
          children: <Widget>[
            Center(
              child: Card(
                child: InkWell(
                  onTap: () => null,
                  child: Container(
                    width: 240,
                    height: 180,
                  ),
                ),
              ),
            ),
            Center(
              child: InputChip(
                onPressed: () => null,
                label: const Text('Tap'),
              ),
            ),
          ],
        ),
      ),
    );
  }
}