<!DOCTYPE html>
<html lang="ja">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <style>
      body, html {
          margin: 0;
          padding: 0;
          width: 100%;
          height: 100%;
      }
      #iframeContainer {
          width: 100%;
          height: 100%;
          overflow: hidden;
      }
      iframe {
          width: 100%;
          height: 100%;
          border: none;
      }
    </style>
  </head>
  <body>
    <div id="iframeContainer"><iframe id="iframe" src=""></iframe></div>
  </body>
</html>
