960.gs is an awesome starter grid. Sadly it's content box... so I've made it play nice with border-box

960-border-box.sass

$width: 960px
$cols: 12
$gutter: 16px

@mixin clearfix-micro()
  &
		*zoom: 1

	&:before,
	&:after
		content: ""
		display: table

	&:after
		clear: both

%rows
	padding-left: $gutter / 2
	padding-right: $gutter / 2
	float: left
	min-height: 1px
%pushpull
	position: relative

*
	-moz-box-sizing: border-box
	-webkit-box-sizing: border-box
	box-sizing: border-box

.row
	+clearfix-micro
	margin: 0 auto
	width: $width

	@for $i from 1 through $cols
		.grid_#{$i}
			width: ( $width / $cols ) * $i
			@extend %rows
		.push_#{$i}
			@extend %pushpull
			left: ( $width / $cols ) * $i
		.pull_#{$i}
			@extend %pushpull
			left: -( ( $width / $cols ) * $i )

Hey!

I tried to compile it here and there. But i always get syntax errors. I never worked with SASS so i can´t debug.

Do you have a hint for me maybe?