¿Como modificar el ancho de mi blog?

Hola buenos días.

¿Alguien sabría decirme como debo hacer para modificar el ancho de mi blog? es decir, donde aparecen los post en la página principal esta limitada la anchura, quisiera que llegara casi al final de la página. No consigo encontrar esta función. Mi blog es http://victorsnk.com/blogsnk

Adjunto el código de mi Stylesheet.:
¡Muchas gracias por la ayuda!

/*
Theme Name: Wiredrive Classic
Theme URI: http://www.wiredrive.com/customercare/wiredrive-classic-theme-for-wordpress-websites/
Author: Wiredrive, Drew Baker, Daniel Bondurant
Author URI: http://www.victorsnk.com/blosnk
License: GNU General Public License
License URI: license.txt

Tags: fixed-width, custom-colors, custom-header, custom-background, theme-options
*/

/* Globals */
html, body {
height: 100%;
margin: 0;
padding: 0;
}

body {
font-family: Helvetica, Arial, sans-serif;
font-size: 12px;
color: #999;
line-height: 1.4;
background-image: url(images/background.gif);
}

img {
border: none;
}

/* Links */
a {
color: #000;
text-decoration: none;
outline: none;
}
a:hover {
color: #fff;
text-decoration: underline;
}
a:active {
outline: none;
}
.nav a {
color: #888;
text-decoration: none;
}
.top-nav a {
color: white;
}
.nav .children a {
color: #ffffff;
}
.entry a.post-edit-link {
float: left;
clear: both;
width: 100%;
margin: 20px 0;
font-size: 10px;
}

/* Page Structure */
#container {
min-height: 100%;
margin: 0 auto;
position: relative;
width: 1000px;
}
#header {
position: relative;
}
#sidebar {
width: 200px;
float: left;
margin: 0 9px 20px 25px;
}
.content-wrapper {
padding: 40px 20px 80px 20px;
overflow: hidden;
}
#footer-wrapper {
height: 60px;
position: absolute;
bottom: 0;
width: 100%;
overflow: hidden;
}
#footer {
padding: 0 20px;
}

/* Header */
#logo {
max-width: 320px;
float: left;
}
#logo a {
display: block;
}
.title {
width: 460px;
text-align: right;
position: absolute;
bottom: 0;
right: 0;
margin-right: 20px;
}
.title h2 {
padding: 0;
margin: 0;
font-size: 24px;
}

/* Indervidual Page Styles */
.pagepost {
float: right;
width: 100%;
}
.entry {
overflow: hidden;
}
.entry p:first-child {
margin-top: 0;
}

/* Protected Forms */
.entry input {
margin: 3px 0;
}

/* Footer */
.footer-content {
width: 830px;
float: left;
}
/* Social Links */
.social-links {
float: right;
margin-top: 20px;
}
.social-links a {
display: inline-block;
height: 24px;
width: 24px;
margin: 0 0 0 10px;
}
.social-links span {
display: none;
}
.twitter {
background: url(images/icon-twitter.png);
}
.facebook {
background: url(images/icon-facebook.png);
}

/* Blog Styles */
.blog .post {
margin-top: 30px;
padding-top: 30px;
}
.blog .post:first-child {
margin-top: 0;
padding-top: 0;
border-top: none;
}
.pagepost .post-title {
display: block;
margin: 0;
}
.blog-nav {
margin-top: 20px;
}
.prev-posts {
float: left;
}
.next-posts {
float: right;
}
.metalinks {
font-size: 11px;
margin: 5px 0 15px 0;
clear: both;
}
.metalinks .by {
margin: 0;
}
.metalinks .date {
margin: 0;
}
.metalinks .comment_bubble {
background: url(images/icon-comment.png) no-repeat center left;
padding: 0 0 2px 19px;
text-decoration: none;
}
.sticky {
background: #EEEEEE;
border-top: 3px solid #DDDDDD;
border-bottom: 3px solid #DDDDDD;
padding: 20px 0;
}

/* Menu’s and Navigation */
/* This is for the main site wide menu */
ul.nav {
margin: 0 0 10px 0;
padding: 0;
font-size: 14px;
}
ul.nav li, ul.nav li ul {
list-style: none;
margin: 0;
padding: 0;
}
.nav ul.children, .nav ul.sub-menu {
padding: 0;
overflow: hidden;
display: none;
}
.nav ul.children li {
margin: 0;
padding: 0;
}
.nav ul.children li a, .nav ul.sub-menu li a {
padding-left: 10px;
}
/* This is for the top drop down menus */
.top.menu {
margin: 0 20px 0 0;
padding: 0;
right: 0;
top: 50%;
position: absolute;
width: 650px;
text-align: right;
}
.top.menu ul, .top.menu li {
float: left;
padding: 0;
margin: 0;
list-style: none;
position: relative;
}
.top.menu ul {
float: right;
}
.top.menu li a {
text-decoration: none;
float: left;
}
.top.menu > ul > li {
margin-left: 20px;
}
.top.menu ul.sub-menu, .top.menu ul.children {
z-index: 10;
opacity: .95;
white-space: nowrap;
overflow: hidden;
float: left;
clear: left;
position: absolute;
top: 100%;
padding: 10px;
margin-left: -10px;
display: none;
z-index: 999;
}
.top.menu .sub-menu li, .top.menu .children li {
text-align: left;
clear: left;
float: left;
}
.top.menu .sub-menu li a, .top.menu .children li a {
padding-left: 0;

}
/* This is for the top nav on the indervidual pages */
ul.sub-nav {
margin: 0;
width: 400px;
overflow: auto;
font-size: 14px;
font-weight: 700;
text-align: right;
float: right;
}
ul.sub-nav li {
margin: 0 15px 0 0;
padding: 0;
color: white;
display: inline-block;
}
ul.sub-nav li:last-child {
margin: 0;
}

/* Comments */
#comments {
margin-top: 40px;
padding-top: 40px;
text-transform: uppercase;
}
#comment {
width: 98%;
}
ul.commentlist {
margin-left: 0;
padding-left: 0;
}
ul.commentlist > li {
list-style: none;
margin-bottom: 20px;
padding-bottom: 20px;
}
.comment-author .avatar {
float: left;
margin-right: 20px;
}
.comment-body .reply {
text-align: right;
}
ul.commentlist ul.children {
list-style: none;
}
ul.commentlist ul.children li {
margin-top: 20px;
padding-top: 20px;
}
#reply-title {
text-transform: uppercase;
}
.bypostauthor{
padding: 10px 0;
}
.form-allowed-tags {
font-size: 10px;
}

/* Widgets */
.nav li.widget {
margin: 10px 0;
display: block;
}
.widgettitle {
margin: 0;
text-transform: uppercase;
font-size: 14px;
}

/* Wiredrive Player Overides */
body .wd-player.popup ul.wd-thumb-list li {
margin: 0 3px 3px 0;
width: 178px;
}
body .wd-player.popup .wd-thumb {
width: 178px;
height: auto;
}
body .wd-player.popup.box-thumbs .wd-thumb {
width: auto;
height: auto;
}
/* WordPress Required */
#tagline {
display: none;
}
.aligncenter, div.aligncenter {
display: block;
margin-left: auto;
margin-right: auto;
}
img.aligncenter {
padding: 10px;
}
.alignleft {
float: left;
}
img.alignleft {
margin: 0 10px 0 0;
}
.alignright {
float: right;
}
img.alignright {
margin: 0 0 0 10px;
}
.gallery-caption {
text-align: center;
}
.wp-caption {
background-color: #f3f3f3;
border: 1px solid #ddd;
-khtml-border-radius: 3px;
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
border-radius: 3px; /* optional rounded corners for browsers that support it */
margin: 10px;
padding-top: 4px;
text-align: center;
}
.wp-caption img {
border: 0 none;
margin: 0;
padding: 0;
}
.wp-caption p.wp-caption-text {
font-size: 11px;
line-height: 17px;
margin: 0;
padding: 0 4px 5px;
}