<!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>