Support overline markup

_source/_plugins/overline.rb

@@ -0,0 +1,15 @@
+module Jekyll
+  class OverlineFilter
+    def self.apply_overline(content)
+      content.gsub(/~([^~]+)~/, '<span class="overline">\1</span>')
+    end
+  end
+
+  Hooks.register [:documents, :pages], :pre_render do |item|
+    if item.output_ext == ".html"
+      item.content = OverlineFilter.apply_overline(item.content)
+    end
+  end
+end
+
+puts "✅ Overline plugin loaded!"

_source/assets/main.scss

@@ -0,0 +1,10 @@
+---
+# Custom stylesheet
+---
+
+@import "minima";
+
+.overline {
+    text-decoration: overline;
+}
+