How to disable responsive layout in wordpress in tewntytwelve theme

<h2>change line #1421 of style.css:</h2>

@media screen and (min-width: 600px)
to
@media screen and (min-width:300px) 
</code></pre>

<h2>and add the following rule to the bottom of the css :</h2>


page {

width:960px; /or whatever width you want the site to be/
}
</code></pre>