aair-one/public/stylesheets/grids.css

body {
  text-align: center;           /* center body content  */
}

#container {
  text-align: left;
  margin: 0 auto;
  width: 73.846em;              /* 73.846em 960px width */
  *width: 72.00em;              /* 97.5% adjust for IE  */
}

#content {
  overflow: hidden;
  width: auto;
  padding: 0.769em 0 0 0;       /* 0.769em 10px top     */
}

#main {
  float: left;
  padding: 0 0.385em;           /* 5px horiz. padding   */
  width: 49.231em;              /* 48.231em 640px width */
  *width: 48.00em;
}

#sidebar {
  float: right;
  padding: 0 0.385em;          /* 5px horiz. padding   */
  width: 23.077em;             /* 23.077em 300px width */
  *width: 22.50em;
}