Use native lazy loading and a two-column pictures grid

_plugins/lazy_images.rb

@@ -0,0 +1,11 @@
+require 'nokogiri'
+
+module LazyImages
+  def lazy_images(content)
+    fragment = Nokogiri::HTML::DocumentFragment.parse(content)
+    fragment.css('img').each { |image| image['loading'] = 'lazy' }
+    fragment.to_html
+  end
+end
+
+Liquid::Template.register_filter(LazyImages)