Twenty Sixteen Full Width Template

Hi,

I’ve followed the instructions for created a full width page template in Twenty Sixteen –

That does work but not between 711-909px. The right margin is still present. I’ve tried adding:

@media screen and (min-width: 44.375em) and (max-width: 48.9375em) {
.page-template-page-fullwidth .content-area {
	float: left;
	margin-right: -100%;
	width: 100%;
}
}

Still the margin persists.

http://style960.com/wordpress

Also, when I’ve added my child theme with the same files to two other vanilla Twenty Sixteen installs, the full width template does not work at all. Using inspector tools the css is been rendered. How can I get this template work on the other two builds?

http://style960.com/build-sdminteriors
http://style960.com/build-blindsetc

Thanks,
Paul.