html - How to apply css style for a span containing an active link

I currently have 2 links enclosed within 2 spans however
when a link is clicked an dis active, the link has a class"linkActive". I need to apply
a border for the span containing the active link how can one do this in css
styles

 HTML

            

 

            Link1
 
             class="sec">
 Link2

            


            

I would
like to apply border to span containing the anchor tag with link active
class

 i tried span.sec
            a.linkActive{
 border-bottom: 3px solid black;

            }

It does
not seem to work. Any help will be appreciated