This question has been answered by BobRay. See the first response.
<html>
<head>
<title>[[*pagetitle]]</title>
</head>
<body>
<h2>[[*longtitle]]</h2>
<div class="content_div">
[[*content]]
</div>
</body>
</html>
<html>
<head>
<title>[[*pagetitle]]</title>
</head>
<body>
<div class="header_div>
[[$header]]
</div>
[[Wayfinder? &startId=`0`]]
<h2>[[*longtitle]]</h2>
<div class="content_div">
[[*content]]
</div>
<div class="side_bar_div>
[[$sidebar]]
</div>
<div class="footer_div">
[[$footer]]
</div>
</body>
</html>
) who happen by -- If you see a page on the web that you like, type Ctrl-u, or select "View Source" in your browser's menu. You will be looking at the raw HTML of the page, and with a little practice, you can learn to see how the author gets the page to look like it does. In a good browser, you can also click on the links to CSS and JS files and see their content displayed in your browser too. 
You can make your grid using bootstrap, LK is absolutely an expert in this area.I prefer semantic gs less/sass mixin or css grid
