
        <!DOCTYPE html>
        <html lang="en">
        <head>
          <meta charset="UTF-8">
          <title>Login</title>
          <style>
            body { font-family: Arial, sans-serif; text-align: center; margin-top: 10%; background: #fafafa; }
            form { display: inline-block; text-align: left; border: 1px solid #ccc; padding: 20px; border-radius: 10px; background: #fff; }
            input { margin: 5px; padding: 6px 10px; width: 200px; }
            h1 { color: #333; }
          </style>
        </head>
        <body>
          <h1>Login</h1>
          <form action="/" method="post">
            <label>Username:<br/><input type="text" name="user" /></label><br/>
            <label>Password:<br/><input type="password" name="pass" /></label><br/><br/>
            <input type="submit" value="Login" />
          </form>
        </body>
        </html>