index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.css" />
    <title>Number Guesser</title>

</head>
<body>
   <div class="container">
       <h1>Number Guesser</h1>
       <div id="game">
           <p>Guess a number between <span class="min-num"></span> and <span class="max-num"></span>.</p>
           <input type="number" id="guess-input" placeholder="Enter your guess...">
           <input type="submit" value="Submit" id="guess-btn">
           <p class="message"></p>
       </div>
   </div> 
   
   <script src="app.js"></script>
</body>
</html>