<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Toggle Element Visibilty with CSS</title>
<link rel="stylesheet" type="text/css" href="style.css">
<meta name="viewport" content="width=device-width, initial-scale=1">
</style>
</head>
<body>
<div class="container">
<div class="toggleable-window">
<input class="toggle" type="checkbox" id="punch" checked>
<label for="punch">≡</label>
<div class="content">content<br>content<br>content</div>
</div>
</div>
</body>
</html>