How can I get the article height in a Joomla Template to be a minimum 100% of the available viewport. In other words, I do not want it to push out the horizontal menu, header, or footer, and if the page is longer than the view port I do want to to scroll, BUT if I have a short article, I still want the container to fill the space between the header and the footer.
For example, if I have a home page with a short tag line, and a "Learn More" button, and those items sit atop a background image, I want the container to fill the space so the background image shows and the position of the tag line on the background image can be controlled.