<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="app.css">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Animated Like Button!</title>
</head>
<body>
    <div class="button">
        <input type="checkbox" id="liked"><label for="liked"><span></span></label>
    </div>
</body>
</html>