expand_less
<body class="fluid d-flex flex-column h-100">
<header>{{*header|core}}{{:header|core}}</header>
<article class="container flex-shrink-0" role="main">{{_main|open}}{{_main|titled}}</article>
<footer class="footer mt-auto py-3">{{*footer|core}}{{:footer|core}}</footer>
</body>