diff --git a/content/typography.md b/content/typography.md
index 178ea57..730d296 100644
--- a/content/typography.md
+++ b/content/typography.md
@@ -98,6 +98,18 @@ Inlined definition/abbreviation, without link: {{def(id="voxel",link=false)}}
 {{ stub_notice(kind="article") }}
 {{ stub_notice(kind="section") }}
 
+---
+
+<details class="notice info">
+<summary id="details-with-summary" tabindex="0">This is a summary.</summary>
+
+Well would you *look* at that! There's **markdown** in here... :D
+
+Yet *moar* math: \\( f_n(\vec{p}) \to [-1, +1] = \enspace ? \\)
+
+</details>
+
+
 ---
 
 Exclusive Choice Set: