How to create a responsive layout with grid using media queries

Source Code: (back to article)

<!DOCTYPE html>
<html>
  <head>
    <title>Title of the document</title>
    <style>
      body {
        margin: 40px;
      }
      .sidebar {
        grid-area: sidebar;
      }
      .sidebar2 {
        grid-area: sidebar2;
      }
      .content {
        grid-area: content;
      }
      .header {
        grid-area: header;
      }
      .footer {
        grid-area: footer;
      }
      .wrapper {
        background-color: #eeeeee;
        color: #444;
        display: grid;
        grid-gap: 1em;
        grid-template-areas: "header" "sidebar" "content" "sidebar2" "footer"
      }
      @media only screen and (min-width: 500px) {
        .wrapper {
          grid-template-columns: 20% auto;
          grid-template-areas: "header   header" "sidebar  content" "sidebar2 sidebar2" "footer   footer";
        }
      }
      @media only screen and (min-width: 600px) {
        .wrapper {
          grid-gap: 20px;
          grid-template-columns: 120px auto 120px;
          grid-template-areas: "header  header  header" "sidebar content sidebar2" "footer  footer  footer";
          max-width: 600px;
        }
      }
      .box {
        background-color: #444;
        color: #ffffff;
        border-radius: 5px;
        padding: 10px;
        font-size: 150%;
      }
      .header,
      .footer {
        background-color: #8ebf42;
      }
      .sidebar2 {
        background-color: #ccc;
        color: #444;
      }
    </style>
  </head>
  <body>
    <div class="wrapper">
      <div class="box header">Header</div>
      <div class="box sidebar">Sidebar</div>
      <div class="box sidebar2">Sidebar 2</div>
      <div class="box content">
        Content
        <br /> When you resize the browser this column will be quite tall.
      </div>
      <div class="box footer">Footer</div>
    </div>
  </body>
</html>