diff --git a/docs/source/_static/theme-override.css b/docs/source/_static/theme-override.css
index 460812aca4..6bcb93349c 100644
--- a/docs/source/_static/theme-override.css
+++ b/docs/source/_static/theme-override.css
@@ -78,4 +78,16 @@ tbody tr:hover {
     .container:has(#left-sidebar) {
         grid-template-columns: 310px minmax(0, 1fr);
     }
+}
+
+#left-sidebar a.expandable {
+    padding: 0 0 0 12px;
+}
+
+#left-sidebar a>button {
+    width: 30px;
+    height: 30px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
 }
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