Real-Time Editor

<!DOCTYPE html>
      <html>
        <head>
          <title>My Portfolio</title>
          <meta charset="UTF-8" />
          <meta name="viewport" content="width=device-width, initial-scale=1.0" />
          <link rel="stylesheet" href="style.css" />
        </head>
        <style>
          body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
          }
      
          header {
            background-color: #333;
            color: #fff;
            padding: 20px;
          }
      
          header h1 {
            margin: 0;
          }
      
          nav ul {
            margin: 0;
            padding: 0;
            list-style: none;
          }
      
          nav li {
            display: inline-block;
            margin-right: 20px;
          }
      
          nav li:last-child {
            margin-right: 0;
          }
      
          nav a {
            color: #fff;
            text-decoration: none;
          }
      
          section {
            padding: 50px 20px;
          }
      
          section h2 {
            margin-bottom: 20px;
          }
      
          ul {
            list-style: none;
            padding: 0;
          }
      
          li {
            margin-bottom: 20px;
          }
      
          label {
            display: block;
            margin-bottom: 10px;
          }
      
          input[type="text"],
          input[type="email"],
          textarea {
            padding: 10px;
            border-radius: 5px;
            margin-bottom: 20px;
          }
      
          input[type="submit"] {
            background-color: #333;
            color: #fff;
            padding: 10px 20px;
            border-radius: 5px;
            cursor: pointer;
          }
      
          footer {
            background-color: #333;
            color: #fff;
            padding: 20px;
            text-align: center;
          }
        </style>
        <body>
          <header>
            <h1>My Portfolio</h1>
            <nav>
              <ul>
                <li><a href="#about">About Me</a></li>
                <li><a href="#projects">My Projects</a></li>
                <li><a href="#contact">Contact Me</a></li>
              </ul>
            </nav>
          </header>
      
          <section id="about">
            <h2>About Me</h2>
            <p>Insert your description here.</p>
          </section>
      
          <section id="projects">
            <h2>My Projects</h2>
            <ul>
              <li>
                <h3>Project 1</h3>
                <p>Description of Project 1</p>
              </li>
              <li>
                <h3>Project 2</h3>
                <p>Description of Project 2</p>
              </li>
              <li>
                <h3>Project 3</h3>
                <p>Description of Project 3</p>
              </li>
            </ul>
          </section>
      
          <section id="contact">
            <h2>Contact Me</h2>
            <form>
              <label for="name">Name:</label>
              <input type="text" id="name" name="name" /><br />
      
              <label for="email">Email:</label>
              <input type="email" id="email" name="email" /><br />
      
              <label for="message">Message:</label>
              <textarea id="message" name="message"></textarea><br />
      
              <input type="submit" value="Send" />
            </form>
          </section>
      
          <footer>
            <p>© 2023 My Portfolio</p>
          </footer>
        </body>
      </html>