diff --git a/static/css/reynir.css b/static/css/reynir.css
new file mode 100644
index 0000000..8931046
--- /dev/null
+++ b/static/css/reynir.css
@@ -0,0 +1,4 @@
+span.explanation {
+  text-decoration: underline;
+  cursor: pointer;
+}