diff --git a/lean4-verso-xp/Main.lean b/lean4-verso-xp/Main.lean
index be5e8ce..9e1bcd9 100644
--- a/lean4-verso-xp/Main.lean
+++ b/lean4-verso-xp/Main.lean
@@ -9,6 +9,7 @@ where
   config := {
     -- destination := "dist",
     extraFiles := [("static", "static")],
+    extraCss := ["/static/overrides.css"],
     -- extraCss := ["/static/colors.css", "/static/theme.css", "/static/print.css", "/static/fonts/source-serif/source-serif-text.css", "/static/fonts/source-code-pro/source-code-pro.css", "/static/katex/katex.min.css"],
     -- extraJs := ["/static/katex/katex.min.js", "/static/math.js", "/static/print.js"],
     extraJs := ["/static/math.js"],
diff --git a/lean4-verso-xp/VersoXp/Math.lean b/lean4-verso-xp/VersoXp/Math.lean
index a9b1958..3a70432 100644
--- a/lean4-verso-xp/VersoXp/Math.lean
+++ b/lean4-verso-xp/VersoXp/Math.lean
@@ -7,8 +7,8 @@ open Lean.MessageSeverity
 -- #check Verso.Doc.MathMode
 
 open Verso Doc Elab in
-@[code_block_expander latex]
-def Manual.latex : CodeBlockExpander
+@[code_block_expander math]
+def Manual.math: CodeBlockExpander
   | _args, str => do
     return #[(← `(Doc.Block.para #[Doc.Inline.math Doc.MathMode.display s!"{$str}"]))]
 
@@ -32,9 +32,9 @@ $$`E=mc^2`
 
 ❌ But no support for multiline math yet.
 
-The following is a workaround inspired by [lecopivo/scientific-computing-lean](https://github.com/lecopivo/scientific-computing-lean/blob/ae7f1f6359465687136a9e75e0c83a1ef19525c2/ScientificComputingInLean/Meta/Latex.lean):
+The following is a workaround inspired by [lecopivo/scientific-computing-lean](https://github.com/lecopivo/scientific-computing-lean/blob/ae7f1f6359465687136a9e75e0c83a1ef19525c2/ScientificComputingInLean/Meta/Latex.lean), and the syntax is the same as [one variant of GFM for math](https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/writing-mathematical-expressions#writing-expressions-as-blocks):
 
-```latex
+```math
 f'(x) = \lim_{h → 0} \frac{f(x+h) - f(x)}{h}
 ```
 
diff --git a/lean4-verso-xp/static/overrides.css b/lean4-verso-xp/static/overrides.css
new file mode 100644
index 0000000..0095584
--- /dev/null
+++ b/lean4-verso-xp/static/overrides.css
@@ -0,0 +1,3 @@
+.section-toc {
+  display: none;
+}