[How To?] Change theme width

[envision]

I've got a tiny issue with wanting to change my theme's width (wrapper). I've cleared my cookies and cache to make sure the modifications were applied.

#wrapper {
	width: 80%;
	padding: 0;
	background-color: #121212;
	border-right-width: 1px;
	border-left-width: 1px;
	border-right-style: solid;
	border-left-style: solid;
	border-right-color: #2b2b2b;
	border-left-color: #2b2b2b;
	margin-top: 0;
	margin-right: auto;
	margin-bottom: 0;
	margin-left: auto;
	height: auto;
}

Basically, the end product I would like it to extend to the green lines (As shown below).

[atnun]

I don't understand what you have already changed. I would start by changing the width of #wrapper from 80% to 100%.