<div id="container">
    <div id="content_left">
    </div>
    <div id="content_right">
    </div>
    <div class="clear"></div>
</div>

#container{overflow:hidden;}  ??????

Source

<style type="text/css">@import 'style.php?c=css/styles.css';</style>

Next, create a file named style.php with the following content.

<?PHP
/*
	$foo='bar';
*/
header('content-type:text/css');
header("Expires: ".gmdate("D, d M Y H:i:s", (time()+900)) . " GMT");
$c=$_GET['c'];
if(preg_match('/\//',$c) or !preg_match('/.css/',$c))
{
	die('only local CSS files allowed!');
}
$css=load($c);
if($css=='')
{
	die('File not Found, sorry!');
}
preg_match_all("/\\$(\w+).*=.*\'(.*)\'/",$css,$constants);
for($i=0;$i<sizeof($constants[1]);$i++)
{
	$css=preg_replace('/\\$'.$constants[1][$i].'/',$constants[2][$i],$css);
}
$css=preg_replace("/\\#.*=.*?;\s+/s",'',$css);

echo $css;
/*
	Function load($file)
	reads the content of the file that you send and returns it
*/
function load($filelocation)
{
	if (file_exists($filelocation))
	{
		$newfile = fopen($filelocation,"r");
		$file_content = fread($newfile, filesize($filelocation));
		fclose($newfile);
		return $file_content;
	}
}
?>

Now in your css file, you can use variables just like this.

/*	Variables
	$fonts = '"MS Trebuchet", Arial, Sans-Serif';
	$color1 = '#999';
	$H1_size = '36px';
	$color2 = '#363';
	$color3 = '#cfc';
*/
body{
	text-align:center;
	background:#333;
	font-family:$fonts;
}
h1 {
	font-size: $H1_size;
	margin:1em auto;
	text-align:left;
	position:relative;
	width:40em;
	background:$color2;
	color: $color3;
}

First, To stop wordpress from asking you for FTP information on plugins, add the following code at the beginning of your wp-config.php file.

 define('FTP_BASE', '/httpdocs/');
define('FTP_CONTENT_DIR', '/httpdocs/wp-content/');
define('FTP_PLUGIN_DIR ', '/httpdocs/wp-content/plugins/');
define('FTP_USER', '<FTP_Username>');
define('FTP_PASS', '<FTP_Password>');
define('FTP_HOST', 'ftp.example.com:21');

If you dont want to add this, you can install Fix Plugin Update. However, using this method will set the permissions of apache:apache on any plugin you install or upgrade, so you wont be able to edit your plugins from FTP without changing the owner/group.

Next, to solve the permissions issues on .htaccess and uploads, were going to add the ‘apache’ user to the ‘psacln’ group by editing ‘/etc/group’ with your favorite text editor. Most advanced users use vi but I used nano.

nano /etc/group

Change:

psacln:x:2524:

to:

psacln:x:2524:apache

For my server I also added psaftp,psaadm:

psacln:x:2524:apache,psaftp,psaadm

Now, for any file/folder you want writable by wordpress, just make it writable by the group.

cd httpdocs
chmod g+w .htaccess
chmod -R g+w wp-content/uploads

Thats It!