diff --git a/agaric/css/agaric.css b/agaric/css/agaric.css
index d70dba6..82d2d07 100644
--- a/agaric/css/agaric.css
+++ b/agaric/css/agaric.css
@@ -7742,7 +7742,8 @@ a.navbar-link:focus,
 
 a.card {
   display: block;
-  height: 100%; }
+  height: 100%;
+  width: 100%; }
 
 .card.is-blue {
   color: #FFFFFF;