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<html>
  <head>
    <meta charset="utf-8">
    <title>Test Nav</title>
    <link rel="stylesheet" href="master.css">
</head>
<body>
  <!-- Header -->
    <header class="header">
      <div class= "container">
        <a href="" class="logo">Test Navigation</a>
        <input class="menu-btn" type="checkbox" id="menu-btn"/>
        <label class="menu-icon" for="menu-btn"><span class="navicon"></span></label>

  <!-- Main Navigation -->
    <ul class="menu">
      <li><a href="#work">Our Work</a></li>
      <li><a href="#about">About</a></li>
      <li><a href="#careers">Careers</a></li>
      <li><a href="#contact">Contact</a></li>
    </ul>
  </div>
  </header>
</body>
</html>