Hi I'm working with a Wordpress template. I have a separate template page for the blog section. On the other pages of the site I have class that works fine and looks like this

.post header h2 { display:none; } 

On the blog page, I add this to the CSS and it works as it should

#main .post header h2 { display:block; }

However if I try that with other classes like

#main .wrapper { background-color:#000000; }

Nothing happens. I've tried adding !important, I've also tried writing like such

body.page-id-15 #main .wrapper { background-color:#000000; }

with no luck. Here is a link to the site. http://gregtregunno.ca/news