Dark mode (#66)

layouts/shortcodes/img.html

@@ -1,4 +1,4 @@
-{{ $source := ($.Page.Resources.ByType "image").GetMatch (printf "*%s*" (.Get "name")) }}
+{{ $source := ($.Page.Resources.ByType "image").GetMatch (printf "%s" (.Get "name")) }}
 {{ $customAlt := .Get "alt" }}
 {{ $customSize := .Get "size" }}
 {{ $lazyLoad := default (default true $.Site.Params.GeekdocImageLazyLoading) (.Get "lazy") }}
@@ -16,21 +16,19 @@
 <div class="flex justify-center">
 <figure class="gdoc-markdown__figure">
     <a class="gdoc-markdown__link--raw" href="{{ .RelPermalink }}">
-        <img
-            {{ if $lazyLoad }}loading="lazy"{{ end }}
-            {{ with $customSize }}
-            src="{{ index $size $customSize }}" alt="{{ $caption }}"
-            {{ else }}
-            srcset="{{ $size.tiny }} 320w,
-                    {{ $size.small }} 600w,
-                    {{ $size.medium }} 1200w,
-                    {{ $size.large }} 2x"
-            sizes="(max-width: 320px) 320w,
-                   (max-width: 600px) 600w,
-                   (max-width: 1200px) 1200w,
-                   2x"
-            src="{{ $size.large }}" alt="{{ $caption }}"
-            {{ end }}/>
+        <picture>
+            <source
+                {{ with $customSize }}
+                srcset="{{ index $size $customSize }}"
+                {{ else }}
+                srcset="{{ $size.small }} 600w,
+                        {{ $size.medium }} 1200w"
+                sizes="100vw"
+                {{ end }} />
+            <img
+                {{ if $lazyLoad }}loading="lazy"{{ end }}
+                src="{{ $size.large }}" alt="{{ $caption }}" />
+        </picture>
     </a>
     {{ with $caption }}
     <figcaption>{{ . }}{{ with $source.Params.credits }} ({{ . | $.Page.RenderString }}){{ end }}</figcaption>