I am trying to get rid of the 1px solid borders automatically created when using the PrimeFaces p:panelGrid, but yet all my attempts to do so fail.
I tried to integrate a style.css doing:
<h:body>
    <f:facet name="last">
        <h:outputStylesheet library="default" name="css/style.css" />
    </f:facet>
    // more code here
</h:body>
But when I check in the resulting HTML given back by the application server (I use Wildfly 8) I am unable to finde an entry like <link type="text/css" rel="stylesheet" href="css/style.css" />. And because of this missing CSS-entry I am not able to perform any CSS-changes within my document like killing the borders of p:panelGrid.
What must I do to integrate the CSS to get rid of the borders in p:panelGrid?
 
    