diff --git a/docs/content/assets/css/customizations.css b/docs/content/assets/css/customizations.css
index 320da152..25cb0274 100644
--- a/docs/content/assets/css/customizations.css
+++ b/docs/content/assets/css/customizations.css
@@ -102,3 +102,8 @@ div.md-content article.md-content__inner a.toclink code {
 .highlight.no-copy .md-clipboard { display: none; }
 
 /* ============================================================================================================= */
+
+/* Make the left-sidebar nav categories better distinguished from page links (bold text) */
+.md-nav__item--nested > .md-nav__link {
+  font-weight: 700;
+}