container width

I feel like I’ve experimented with everything I possibly can to try to widen the container holding the main blog content at https://www.actionflickchick.com/superaction

Isn’t this the part I should be editing?

#main_content { background: #000000 url(images/page-bg.jpg) repeat; float: left; margin: 0 auto 0 auto; padding: 0; width: 1000px; border: #cc9933 1px solid; }
#container { background: #F3EFEB; float: left; width: 660px; margin: 0 10px 0 10px; padding: 0 10px 10px 10px; border: #94927b 3px double; }
#container_wide { background: #e0dcc5; float: left; width: 1000px; margin: 0 0 0 35px; padding: 5px 5px 0 7px; border: #94927b 2px solid; }