use https://github.com/nunocoracao/blowfish.git

themes/blowfish/layouts/_default/_markup/render-heading.html

@@ -0,0 +1,12 @@
+{{ $strAnchor := urlize .Anchor }}
+{{ $replacedAnchor := replaceRE "%25" "" $strAnchor }}
+<h{{ .Level }} class="relative group">{{ .Text | safeHTML }} 
+    <div id="{{ .Anchor | safeURL | urlize }}" class="anchor"></div>
+    {{ if.Page.Params.showHeadingAnchors | default (.Page.Site.Params.article.showHeadingAnchors | default true) }}
+    <span
+        class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100">
+        <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700"
+            style="text-decoration-line: none !important;" href="#{{ $replacedAnchor | safeURL }}" aria-label="{{ i18n "article.anchor_label" }}">#</a>
+    </span>        
+    {{ end }}
+</h{{ .Level }}>

themes/blowfish/layouts/_default/_markup/render-image.html

@@ -0,0 +1,47 @@
+{{ $disableImageOptimization := .Page.Site.Params.disableImageOptimization | default false }}
+{{ $url := urls.Parse .Destination }}
+{{ $altText := .Text }}
+{{ $caption := .Title }}
+{{ if findRE "^https?" $url.Scheme }}
+  <figure>
+    <img class="my-0 rounded-md" loading="lazy" src="{{ $url.String }}" alt="{{ $altText }}" />
+    {{ with $caption }}<figcaption>{{ . | markdownify }}</figcaption>{{ end }}
+  </figure>
+{{ else }}
+  {{ $resource := "" }}
+  {{ if $.Page.Resources.GetMatch ($url.String) }}
+    {{ $resource = $.Page.Resources.GetMatch ($url.String) }}
+  {{ else if resources.GetMatch ($url.String) }}
+    {{ $resource = resources.Get ($url.String) }}
+  {{ end }}
+  {{ with $resource }}
+    <figure>
+      {{ if $disableImageOptimization }}
+      <img
+        class="my-0 rounded-md"
+        loading="lazy"
+        src="{{ .RelPermalink }}"
+        alt="{{ $altText }}"
+      />
+      {{ else }}
+      <img
+        class="my-0 rounded-md"
+        loading="lazy"
+        srcset="
+        {{ (.Resize "330x").RelPermalink }} 330w,
+        {{ (.Resize "660x").RelPermalink }} 660w,
+        {{ (.Resize "1024x").RelPermalink }} 1024w,
+        {{ (.Resize "1320x").RelPermalink }} 2x"
+        src="{{ (.Resize "660x").RelPermalink }}"
+        alt="{{ $altText }}"
+      />
+      {{ end }}
+      {{ with $caption }}<figcaption>{{ . | markdownify }}</figcaption>{{ end }}
+    </figure>
+  {{ else }}
+    <figure>
+      <img class="my-0 rounded-md" loading="lazy" src="{{ $url.String }}" alt="{{ $altText }}" />
+      {{ with $caption }}<figcaption>{{ . | markdownify }}</figcaption>{{ end }}
+    </figure>
+  {{ end }}
+{{ end }}

themes/blowfish/layouts/_default/_markup/render-link.html

@@ -0,0 +1,2 @@
+<a href="{{ .Destination | safeURL }}" {{ with .Title}} title="{{ . }}"{{ end }} {{ if or (strings.HasPrefix .Destination "http:") (strings.HasPrefix .Destination "https:") }} target="_blank"{{ end }}>
+    {{ .Text | safeHTML }}</a>