Learn More About CSS Pseudo Selectors By Building A Balance Sheet - Step 11

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<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Balance Sheet</title>
    <link rel="stylesheet" href="./styles.css">
  </head>
  <body>
    <main>
      <section>
        <h1>
          <span class="flex">
            <span>AcmeWidgetCorp</span>
            <span>Balance Sheet</span>
          </span>
        </h1>
        <div id="years" aria-hidden="true">
          <span class="year">2019</span>
          <span class="year">2020</span>
          <span class="year">2021</span>
        </div>
        <div class="table-wrap">
          <table>
            <caption>Assets</caption>
            <thead>
              <tr>
                <td></td>
                <th><span class="sr-only year">2019</span></th>
                <th><span class="sr-only year">2020</span></th>
                <th><span class="current">2021</span></th>
              </tr>
            </thead>
            <tbody>
            </tbody>
          </table>
          <table>
          </table>
          <table>
          </table>
        </div>
      </section>
    </main>
  </body>
</html>
/* file: styles.css */

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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:107.0) Gecko/20100101 Firefox/107.0

Challenge: Learn More About CSS Pseudo Selectors By Building A Balance Sheet - Step 11

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Hi there, what does the hint say?