diff --git a/css/puls4.styl b/css/puls4.styl
index 5bdedb7..bc5565a 100644
--- a/css/puls4.styl
+++ b/css/puls4.styl
@@ -187,6 +187,17 @@ nav
 					margin 0 1em 0 0
 					padding 2px 5px
 					text-decoration none
+					position relative
+
+					&:after
+						border-bottom 9px solid transparent
+						border-right 5px solid transparent
+						border-left 5px solid transparent
+						border-top 7px solid gris_oscuro
+						content ""
+						right 0
+						position absolute
+						bottom -13px
 
 				.estrellita
 					text-decoration none