diff --git a/docs/config/_default/config.toml b/docs/config/_default/config.toml
index 0314232e90f..c0c5bea05e7 100644
--- a/docs/config/_default/config.toml
+++ b/docs/config/_default/config.toml
@@ -38,7 +38,7 @@ theme = "learn"
   # Order sections in menu by "weight" or "title". Default to "weight"
   ordersectionsby = "weight"
   # Provide a list of custom css files to load relative from the `static/` folder in the site root.
-  custom_css = ["css/labels.css", "css/shadow-around-images.css", "css/table-of-contents.css"]
+  custom_css = ["css/chapters.css", "css/labels.css", "css/shadow-around-images.css", "css/table-of-contents.css"]
 
 [outputs]
   home = ["HTML", "RSS", "JSON"]
diff --git a/docs/static/css/chapters.css b/docs/static/css/chapters.css
new file mode 100644
index 00000000000..4df40c79507
--- /dev/null
+++ b/docs/static/css/chapters.css
@@ -0,0 +1,4 @@
+#chapter h2 ~ p {
+    text-align: left;
+    font-size: 1rem;
+}