Fix Missing Background Color On Some Cards

resources/less/metager/general/cards.less

@@ -16,4 +16,8 @@
     @media(min-width: @screen-small) {
         padding: 1rem;
     }
-}
\ No newline at end of file
+}
+
+.result-hoster>.card {
+    background-color: @background-color;
+}