Initial working draft.

layouts/_shortcodes/banner.html

@@ -0,0 +1,4 @@
+{{ $src := .Get "src" }}
+{{ $alt := .Get "alt" }}
+{{ $title := .Get "title" }}
+<img class="banner img-fluid" src="{{ $src }}" alt="{{ $alt }}" title="{{ $title }}" width="100%">

layouts/_shortcodes/button.html

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+{{- $href := .Get "href" -}}
+{{- $text := .Get "text" -}}
+{{- $class := or (.Get "class") "btn-primary" -}}
+<a href="{{ $href }}" class="btn {{ $class }} mb-3">{{ $text }}</a>

layouts/_shortcodes/card.html

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+<div class="col">
+  <div class="card h-100">
+    <h5 class="card-header">{{ .Get "title" }}</h5>
+    <div class="card-body">
+      <p class="card-text">{{ .Inner }}</p>
+    </div>
+    {{- $link_href := .Get "link-href" -}}
+    {{- if $link_href }}
+      <div class="card-footer text-body-secondary">
+        <a href="{{ $link_href }}">{{ .Get "link-text" }}</a>
+      </div>
+    {{- end -}}
+  </div>
+</div>
+

layouts/_shortcodes/cards.html

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+{{- $cols := or (.Get "cols") 4 -}}
+<div class="row row-cols-1 row-cols-lg-{{ $cols }} g-4 mb-5">
+  {{ .Inner }}
+</div>
+

layouts/_shortcodes/cookie-settings.html

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+<p>
+  Aktuelle Cookie-Einstellung: <strong id="cookie-status">&mdash;</strong>
+</p>
+<button id="cookie-settings" onclick="reopenCookieBanner()" class="btn btn-secondary mb-3">
+  Cookie-Einstellung ändern
+</button>

layouts/_shortcodes/current-year.html

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+{{- now.Format "2006" -}}

layouts/_shortcodes/environment.html

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+<span class="small">{{ or hugo.BuildDate "live" }}/{{ hugo.Version }}/{{ hugo.Environment }}</span>

layouts/_shortcodes/img.html

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+{{- $src := .Get "src" }}
+{{- $alt := .Get "alt" }}
+{{- $title := .Get "title" }}
+{{- $class := .Get "class" }}
+<img class="img-fluid {{ $class }}" src="{{ $src }}" title="{{ $title }}" alt="{{ $alt }}">