--description--

CSS Grid can be an easy way to make your site more responsive by using media queries to rearrange grid areas, change dimensions of a grid, and rearrange the placement of items.

In the preview, when the viewport width is 300px or more, the number of columns changes from 1 to 2. The advertisement area then occupies the left column completely.

--instructions--

When the viewport width is 400px or more, make the header area occupy the top row completely and the footer area occupy the bottom row completely.

--hints--

When the viewport is 400px or more, container class should have a grid-template-areas property in which the header and footer areas occupy the top and bottom rows respectively and advert and content occupy the left and right columns of the middle row.

assert(
  __helpers
    .removeCssComments(code)
    .match(
      /@media\s*?\(\s*?min-width\s*?:\s*?400px\s*?\)[\s\S]*.container\s*?{[\s\S]*grid-template-areas\s*?:\s*?"\s*?header\s*?header\s*?"\s*?"\s*?advert\s*?content\s*?"\s*?"\s*?footer\s*?footer\s*?"\s*?;[\s\S]*}/gi
    )
);

--seed--

--seed-contents--

<style>
  .item1 {
    background: LightSkyBlue;
    grid-area: header;
  }

  .item2 {
    background: LightSalmon;
    grid-area: advert;
  }

  .item3 {
    background: PaleTurquoise;
    grid-area: content;
  }

  .item4 {
    background: lightpink;
    grid-area: footer;
  }

  .container {
    font-size: 1.5em;
    min-height: 300px;
    width: 100%;
    background: LightGray;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: 50px auto 1fr auto;
    grid-gap: 10px;
    grid-template-areas:
      "header"
      "advert"
      "content"
      "footer";
  }

  @media (min-width: 300px){
    .container{
      grid-template-columns: auto 1fr;
      grid-template-rows: auto 1fr auto;
      grid-template-areas:
        "advert header"
        "advert content"
        "advert footer";
    }
  }

  @media (min-width: 400px){
    .container{
      grid-template-areas:
      /* Only change code below this line */
        "advert header"
        "advert content"
        "advert footer";
      /* Only change code above this line */
    }
  }
</style>

<div class="container">
  <div class="item1">header</div>
  <div class="item2">advert</div>
  <div class="item3">content</div>
  <div class="item4">footer</div>
</div>

--solutions--

<style>
  .item1 {
    background: LightSkyBlue;
    grid-area: header;
  }

  .item2 {
    background: LightSalmon;
    grid-area: advert;
  }

  .item3 {
    background: PaleTurquoise;
    grid-area: content;
  }

  .item4 {
    background: lightpink;
    grid-area: footer;
  }

  .container {
    font-size: 1.5em;
    min-height: 300px;
    width: 100%;
    background: LightGray;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: 50px auto 1fr auto;
    grid-gap: 10px;
    grid-template-areas:
      "header"
      "advert"
      "content"
      "footer";
  }

  @media (min-width: 300px){
    .container{
      grid-template-columns: auto 1fr;
      grid-template-rows: auto 1fr auto;
      grid-template-areas:
        "advert header"
        "advert content"
        "advert footer";
    }
  }

  @media (min-width: 400px){
    .container{
      grid-template-areas:
        "header header"
        "advert content"
        "footer footer";
    }
  }
</style>

<div class="container">
  <div class="item1">header</div>
  <div class="item2">advert</div>
  <div class="item3">content</div>
  <div class="item4">footer</div>
</div>