I want to design the layout with 100% height of the viewport (minus header height: 70px;).
I’m able to achieve the outer layout, [see pen] (http://codepen.io/anon/pen/MKberp) here and I want the panel’s body also to be extend to 100% height through css (responsive).
I’m using bootstrap 3.3.6 and targeted browsers are IE11+ and latest browser’s.
If using the latest browsers, I guess one could use the viewport-unit vh in combination with calc, and maybe give that page-header and page-footer a fixed height.