How do I force a css grid container take the full width and height of the device screen for a single page app? Modified example is from Mozilla: [Firefox documentation][1]

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-css --&gt;

    .wrapper {
      display: grid;
      border-style: solid;
      border-color: red;
      grid-template-columns: repeat(3, 1fr);
      grid-template-rows: repeat(3, 1fr);
      grid-gap: 10px;
    }
    .one {
      border-style: solid;
      border-color: blue;
      grid-column: 1 / 3;
      grid-row: 1;
    }
    .two {
      border-style: solid;
      border-color: yellow;
      grid-column: 2 / 4;
      grid-row: 1 / 3;
    }
    .three {
      border-style: solid;
      border-color: violet;
      grid-row: 2 / 5;
      grid-column: 1;
    }
    .four {
      border-style: solid;
      border-color: aqua;
      grid-column: 3;
      grid-row: 3;
    }
    .five {
      border-style: solid;
      border-color: green;
      grid-column: 2;
      grid-row: 4;
    }
    .six {
      border-style: solid;
      border-color: purple;
      grid-column: 3;
      grid-row: 4;
    }


&lt;!-- language: lang-html --&gt;

    &lt;html&gt;
    &lt;div class=&quot;wrapper&quot;&gt;
      &lt;div class=&quot;one&quot;&gt;One&lt;/div&gt;
      &lt;div class=&quot;two&quot;&gt;Two&lt;/div&gt;
      &lt;div class=&quot;three&quot;&gt;Three&lt;/div&gt;
      &lt;div class=&quot;four&quot;&gt;Four&lt;/div&gt;
      &lt;div class=&quot;five&quot;&gt;Five&lt;/div&gt;
      &lt;div class=&quot;six&quot;&gt;Six&lt;/div&gt;
    &lt;/div&gt;
    &lt;/html&gt;


&lt;!-- end snippet --&gt;
I&#39;m not sure what to do to get this code to work.  Any ideas/suggestions would be appreciated.

  [1]: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout

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force css grid container to fill full screen of device