@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document url-prefix("http://www.google.com/calendar/"), 
               url-prefix("https://www.google.com/calendar/") {

    #maincell.has-sn #gridcontainer {
        margin-right: 10px !important;
    }
    #maincell.has-sn-ex #gridcontainer {
        margin-right: 0 !important;
    }
    #calcontent #gadgetcell {
        margin-right: 0 !important;
    }
    #calcontent #rhstogglecell.rhstogglecell-open {
        right: 178px !important;
    }

}