Add ToC styling to CSS and settings to default archetype.

archetypes/default.adoc

@@ -7,6 +7,9 @@ type: {{ .Type }}
 draft: true
 tags:
 -
+toc: false
 ---
 
 :source-highlighter: pygments
+:toc:
+:toclevels: 2

assets/blog.css

@@ -158,3 +158,23 @@ kbd
     border: var(--fg-dim) solid 0.1em;
     border-radius: 0.2em;
 }
+
+.toc
+{
+    float: right;
+    margin-left: 1em;
+    padding: 0 0.2em;
+    max-width: 40ch;
+    box-shadow: 0 0 0.1em;
+    border-radius: 0.1em;
+}
+
+.toc h2, .toc ul, .toc ol
+{
+    margin: 0 0;
+}
+
+.toc h2
+{
+    font-size: 120%;
+}