<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Guestbook</title> <style> body {{ max-width:95%; margin:auto; }} .container {{ border:1px solid red; }} </style> </head> <body> <main> {content} </main> </body> </html>
