XF 1.2 Discussion List - Last message font

I am trying to change the fonts on the last message text on the discussion list page - without also changing the Title text.

In the ACP options they change together... Can someone point me to the right location to make an adjustment?
I have put this :

.lastThreadMeta {

    font-size: 11px !important;

in my extra.css file but does not have any effect.

have also tired .lastThreadMeta .type but no luck

Any suggestions?