.container { width:835px; margin: 0 auto; }
.column { float: left; margin-right: 10px; }
.span-10 { width: 390px; }
.last { margin-right: 0; }
.span-8 { width: 310px; }
.span-6 { width: 230px; }
.span-18 { width: 710px; }