<html> <head> <meta charset="utf-8"> <title>メディアクエリ</title> <link rel="stylesheet" href="style.css"> </head> <body> <div id="container"> <div class="box"></div> <div class="box"></div> <div class="box"></div> <div class="box"></div> </div> </body> </html> @charset "utf-8"; /* CSS Doc…
