diff --git a/docs/source/css/custom.css b/docs/source/css/custom.css
new file mode 100644
index 0000000000000000000000000000000000000000..78981922613b2afb6025042ff6bd878ac1994e85
--- /dev/null
+++ b/docs/source/css/custom.css
@@ -0,0 +1 @@
+a