title: Card width match with parent : flutter
body: <p>I am new in Flutter so I want to know that how can I set a width to match parent layout width</p>
  
  <pre><code>new Scaffold(
      body: new Container(
    decoration: new BoxDecoration(color: AppColors.hoBlue),
    child: Padding(
      padding: EdgeInsets.all(20.0),
      child: new Center(
          child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: &lt;Widget&gt;[
          Stack(
            children: &lt;Widget&gt;[
              Row(
                children: &lt;Widget&gt;[
                  Expanded(
                    child: Padding(
                      padding: EdgeInsets.all(20.0),
                      child: Card(
                        child: Padding(
                            padding: EdgeInsets.fromLTRB(20, 0.0, 20.0,20.0),
                            child: Column(
                              children: &lt;Widget&gt;[
                                 Card(
                                      elevation: 10.0,
                                      child: Padding(
                                        padding: EdgeInsets.all(20.0),
                                        child:
                                        Text("Sign Up Here"),
                                      ),
                                    ),
                                TextField(
                                  decoration: InputDecoration(
                                    labelText: "Email",
                                    hintText: "example@mail.com",
                                  ),
                                  autofocus: true,
                                ),
                                TextField(
                                  decoration: InputDecoration(
                                    labelText: "Password",
                                  ),
                                  autofocus: true,
                                ),
                                SizedBox(
                                  width: double.infinity,
                                  // height: double.infinity,
                                  child: new RaisedButton(
                                    color: AppColors.hoBlue,
                                    child: Text(
                                      "Sign In",
                                      style: TextStyle(
                                        color: Colors.white,
                                        fontFamily: 'Raleway',
                                        fontSize: 22.0,
                                      ),
                                    ),
                                    onPressed: () =&gt; print('Sign In'),
                                  ),
                                )
                              ],
                            )),
                      ),
                    ),
                  ),
                ],
              )
            ],
          ),
        ],
      )),
    ),
  ));
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/amWb6.png" rel="noreferrer">Result From Code Above</a></p>
  
  <p>i need help to make card stack with parent like 
  <a href="https://i.stack.imgur.com/uZ0zs.png" rel="noreferrer">Result I want</a></p>
  
  <p>i already try with using stack but the result card parent card overlaping the first card.</p>
  
  <p>I know about little bit on Expanded tag but Expanded expand view to both direction, i dont know how to do it. Help me if you know, Thanks in Advance.</p>