Allargare le colonne area-testo centrale sul tema Twenty Fourteen

Salve ho installato il Tema Twenty Fourteen ma avrei bisogno di ampliare un pochino l'area in cui scrivo gli articoli. Cercando su google ho capito che devo aprire l'editor ed andare su style.css, ma non ho capito dove trovare mettere esattamente il nuovo parametro widht. Ecco l'introduzione della pagina dell'editor style.css...

/**
* Table of Contents:
*
* 1.0 - Reset
* 2.0 - Repeatable Patterns
* 3.0 - Basic Structure
* 4.0 - Header
* 5.0 - Navigation
* 6.0 - Content
* 6.1 - Post Thumbnail
* 6.2 - Entry Header
* 6.3 - Entry Meta
* 6.4 - Entry Content
* 6.5 - Galleries
* 6.6 - Post Formats
* 6.7 - Post/Image/Paging Navigation
* 6.8 - Attachments
* 6.9 - Archives
* 6.10 - Contributor Page
* 6.11 - 404 Page
* 6.12 - Full-width
* 6.13 - Singular
* 6.14 - Comments
* 7.0 - Sidebar
* 7.1 - Widgets
* 7.2 - Content Sidebar Widgets
* 8.0 - Footer
* 9.0 - Featured Content
* 10.0 - Multisite
* 11.0 - Media Queries
* 12.0 - Print


Il consiglio che ho trovato su internet riguardava la sidebar, ma non il contenuto centrale della pagina. Penso quindi debba cercare nella sezione 6.4 e cambiare il primo valore accanto a widht che trovo, giusto? Ma non vorrei fare stupidaggini. Ecco qui la sezione:

* 6.4 Entry Content
* -----------------------------------------------------------------------------
*/

.entry-content,
.entry-summary,
.page-content {
-webkit-hyphens: auto;
-moz-hyphens: auto;
-ms-hyphens: auto;
hyphens: auto;
word-wrap: break-word;
}

.site-content .entry-content,
.site-content .entry-summary,
.page-content {
background-color: #fff;
padding: 12px 10px 0;
}

.page .entry-content {
padding-top: 0;
}

.entry-content h1:first-child,
.entry-content h2:first-child,
.entry-content h3:first-child,
.entry-content h4:first-child,
.entry-content h5:first-child,
.entry-content h6:first-child,
.entry-summary h1:first-child,
.entry-summary h2:first-child,
.entry-summary h3:first-child,
.entry-summary h4:first-child,
.entry-summary h5:first-child,
.entry-summary h6:first-child,
.page-content h1:first-child,
.page-content h2:first-child,
.page-content h3:first-child,
.page-content h4:first-child,
.page-content h5:first-child,
.page-content h6:first-child {
margin-top: 0;
}

.entry-content a,
.entry-summary a,
.page-content a,
.comment-content a {
text-decoration: underline;
}

.entry-content a:hover,
.entry-summary a:hover,
.page-content a:hover,
.comment-content a:hover,
.entry-content a.button,
.entry-summary a.button,
.page-content a.button,
.comment-content a.button {
text-decoration: none;
}

.entry-content table,
.comment-content table {
font-size: 14px;
line-height: 1.2857142857;
margin-bottom: 24px;
}

.entry-content th,
.comment-content th {
font-weight: 700;
padding: 8px;
text-transform: uppercase;
}

.entry-content td,
.comment-content td {
padding: 8px;
}

.entry-content .edit-link {
clear: both;
display: block;
font-size: 12px;
font-weight: 400;
line-height: 1.3333333333;
text-transform: uppercase;
}

.entry-content .edit-link a {
color: #767676;
text-decoration: none;
}

.entry-content .edit-link a:hover {
color: #41a62a;
}

/* Mediaelements */

.hentry .mejs-container {
margin: 12px 0 18px;
}

.hentry .mejs-mediaelement,
.hentry .mejs-container .mejs-controls {
background: #000;
}

.hentry .mejs-controls .mejs-time-rail .mejs-time-loaded,
.hentry .mejs-controls .mejs-horizontal-volume-slider .mejs-horizontal-volume-current {
background: #fff;
}

.hentry .mejs-controls .mejs-time-rail .mejs-time-current {
background: #24890d;
}

.hentry .mejs-controls .mejs-time-rail .mejs-time-total,
.hentry .mejs-controls .mejs-horizontal-volume-slider .mejs-horizontal-volume-total {
background: rgba(255, 255, 255, .33);
}

.hentry .mejs-container .mejs-controls .mejs-time {
padding-top: 9px;
}

.hentry .mejs-controls .mejs-time-rail span,
.hentry .mejs-controls .mejs-horizontal-volume-slider .mejs-horizontal-volume-total,
.hentry .mejs-controls .mejs-horizontal-volume-slider .mejs-horizontal-volume-current {
border-radius: 0;
}

.hentry .mejs-overlay-loading {
background: transparent;
}

/* Page links */

.page-links {
clear: both;
font-size: 12px;
font-weight: 900;
line-height: 2;
margin: 24px 0;
text-transform: uppercase;
}

.page-links a,
.page-links > span {
background: #fff;
border: 1px solid #fff;
display: inline-block;
height: 22px;
margin: 0 1px 2px 0;
text-align: center;
width: 22px;
}

.page-links a {
background: #000;
border: 1px solid #000;
color: #fff;
text-decoration: none;
}

.page-links a:hover {
background: #41a62a;
border: 1px solid #41a62a;
color: #fff;
}

.page-links > .page-links-title {
height: auto;
margin: 0;
padding-right: 7px;
width: auto;
}




CHE COSA DEVO CAMBIARE? :???: