add special 'cards' (i.e. zettel) layout

layouts/cards/single.html

@@ -0,0 +1,48 @@
+{{ define "main" -}}
+
+<div class="row">
+  {{- $mainwidth := or (and .Params.noSidebar "12") "8" -}}
+  <div class="col-md-{{ $mainwidth }}">
+    <article class="card mt-3 mb-3" 
+             itemscope itemtype="http://schema.org/BlogPosting">
+      {{ if .Title -}}
+      <header class="post-header card-header">
+        <h2 class="post-title" itemprop="name headline">{{ .Title }}</h2>
+        {{ if and (not .Params.nodate) .Date -}}
+        <p class="post-meta">
+          <time datetime='{{ .Date.Format "2006-01-02T15:04:05Z07:00" }}' 
+                itemprop="datePublished">{{ .Date.Format (i18n "dateFormat") }}</time>
+          {{ with .Params.Author -}} • 
+            <span itemprop="author" itemscope 
+                  itemtype="http://schema.org/Person">
+              <span itemprop="name">{{ . }}</span></span>
+          {{- end }}
+        </p>
+        {{- end }}
+      </header>
+      {{- end }}
+      {{ with .Content -}}
+      <div class="post-content card-body" itemprop="articleBody">{{ . }}</div>
+      {{- end }}
+      
+	  {{- $related := .Site.RegularPages.RelatedTo (keyVals "parents" .Params.pageid) -}}
+      {{ range sort (sort $related "Date" "desc") "Weight" }}
+        <div class="card-body">
+          <h3 class="post-title" itemprop="name headline">{{ .Title }}</h3>
+          {{ with .Content -}}
+          <div itemprop="articleBody">{{ . }}</div>
+          {{- end }}
+  	    </div>
+      {{ end }}
+
+	</article>
+
+  </div>
+ 
+  {{ if not .Params.noSidebar -}}
+    {{ partial "sidebar.html" . }}
+  {{- end }}
+</div>
+
+{{- end }}
+