Cant change font-size on accordion hover

Cant change font-size on accordion hover

Hello,

Im trying to change the font size when I hover over the links in an accordion.

But I cant seem to get it to change. The below doesnt work. Im sure it's my selector.

  1.  .ui-widget-content a:hover{      
  2.   font-size:18px !important;         
  3.  }