Sidebar woe

OK, I have the following CSS running on http://www.thejudge13.com that alters the widths of sidebars and content along with some rather nice dividing lines between these elements. Also included is the hiding of thumbs down votes from my commentators.

div.rating-nero-value + div.rating-nero-icon, div.rating-nero-value +
div.rating-nero-icon + div.rating-nero-value {
display: none !important;
}

#page {
background-color: white;
max-width: 1100px;
}

body.custom-background {
background-color: black;
}

#content {
border-left: 1px solid #ddd;
border-right: 1px solid #ddd;
padding: 0 1.75%;
}

.featured-image img.attachment-archive-thumbnail.wp-post-image {
width: 100%;
}

#content {
width: 55%;
}

#tertiary {
float: right;
width: 20%;
}

@media (max-width: 768px) {
#content {
width: 100%;
}
}

So what I think would make me complete and totally happy with things would be the removal of the right hand side bar entirely when viewing a post.

I’ve search the numerous CSS tweaks on the forum for total sidebar removal and nothing seems to work in the editor.

Can anyone point out a fix?