title: Correct method to center elements in ionic2
body: <p>I have placed some text and a button on page. I am currenlty centering it using traditional css methods that i know of. Is this the correct way to center in IONIC 2?</p>
  
  <pre><code>&lt;ion-content padding class="login-signup"&gt;
  
    &lt;ion-card&gt;
  
    &lt;div class="or-label"&gt;
     SOME-TEXT
    &lt;/div&gt;
  
    &lt;div class="signup-button"&gt;
      &lt;button outline&gt;Signup&lt;/button&gt;
    &lt;/div&gt;
  
  &lt;/ion-content&gt;
  </code></pre>
  
  <p>// corresponding css</p>
  
  <pre><code> .or-label {
      width: 20%;
      font-size: 16px;
      margin: 0 auto;
      margin-top: 2em;
      margin-bottom: 2em;
      height: 50px;
      text-align: center;
      color: red;
    }
  
  
  .signup-button {
    text-align:center;
  }
  </code></pre>