Untitled

<!DOCTYPE html>
<html lang="en">

<head>
  <link rel="stylesheet" href="./index.css">
  <title>CSS</title>
</head>

<body>

  <h2 id="content-header">Content</h2>


  <div id="main-content">

    <P>Hello fellow <strong>programmers</strong></P>
    <P class="test">Do your best, be a programmer</P>


    <div id="sub-content">
      <p>More Content</p>
    </div>

  </div>


  <div class="all-articles">
    <h2>HELLO 1</h2>
    <P>first p tag</P>
    <P>p tag</P>
    <P>p tag</P>

    <h2>HELLO 2</h2>
    <P>second p tag</P>
    <P>p tag</P>
    <P>p tag</P>

  </div>

</body>

</html>