BuddyPress.org

I opened the folder and found the original custom css which is below and also the style.css which is after the custom. I didnt see where I could find the nav menu?

body {
width: 1000px;
}

#leftSidebar {
width: 182px;
float: left;
padding: 20px 5px 20px 20px;
background: url( images/sidebar_back.gif ) top left repeat-x;
margin-top: 1px;
overflow: hidden;
border-right: 1px solid #e4e4e4;
}

#leftSidebar .widget {
margin-bottom: 20px;
}

#leftSidebar h3.widgettitle {
background: #eaeaea;
padding: 5px 15px;
font-size: 12px;
clear: left;
margin: 10px -4px 10px -20px;
}

#wp-admin-bar div.padder {
width: 1000px !important;
}

#content div.padder {
float: left;
width: 525px;
border-left: 1px solid #e4e4e4;
margin-right: 226px;
border-right: 0px solid #e4e4e4;
-moz-border-radius-topleft: 0px;
-webkit-border-top-left-radius: 0px;
-moz-border-radius-bottomleft: 0px;
-webkit-border-bottom-left-radius: 0px;
margin-left: -1px;
}

div.post div.post-content, div.comment-content {
margin-left: 0px;
}

THIS IS THE STYLE.CSS
/*
Theme Name: BP Columns
Theme URI: http://buddypress.org
Description: A 3 Column Buddypress theme.
Version: 1.2
Author: modemlooper
Author URI: http://twitter.com/modemlooper
Template: bp-default
Tags: buddypress, three-columns
*/

/* Inherit the default theme styles */

@import url( ../../plugins/buddypress/bp-themes/bp-default/_inc/css/default.css );

/* Inherit the default theme adminbar styles */

@import url( ../../plugins/buddypress/bp-themes/bp-default/_inc/css/adminbar.css );

/* Custom styles */

@import url( custom.css );