Reponsive HTML5 scale to content

I'm trying to publish a series of short documents through the responsive html5 setting in the publishing pod.

When I test the output the default stretches the content across the entire width of the screen when viewed on a computer, which looks horrible and is tough reading.

Is there any setting where the default would scale to content so that when the window first opened the default layout have the aspect ratio of the original framemaker document, or the printed page.