Tagline font size in Catch Base Pro

Hello, The tagline font-size is way too small. I tried to change the font-size using Custom CSS but nothing happened. I followed advice from another post and added this code:

@media screen and (min-width: 961px) {	
    #site-description {
        font-size: 24px;
    }
}

Can anyone tell me how to change the font-size for the tagline?