KNACSS/css/grids.css

/* ----------------------------- */
/* ==grids                       */
/* ----------------------------- */

/* grids inspired from SUIT https://github.com/suitcss/suit */
/* font-family hack explained here : https://github.com/raphaelgoetter/KNACSS/issues/37 */

.grid {
	overflow: hidden;
	font-family: FreeSans, Arimo, "Droid Sans", Helvetica, Arial, sans-serif;
}
.grid > * {
	display: block;
	padding: 0;
	margin-left: -20px; /* gutter value */
	text-align: left;
	letter-spacing: -0.31em;
	text-rendering: optimizespeed;
}
/* Opera hack */
.opera:-o-prefocus,
.grid > * {
	word-spacing: -0.43em;
}
.grid > * > * {
	display: inline-block;
	width: 100%;	
	padding-left: 20px; /* gutter value */
	margin-left: 0;
	vertical-align: top;
	text-align: left;
	letter-spacing: normal;
	word-spacing: normal;
	text-rendering: auto;
	*display: inline; *zoom: 1; /* IE67 hack */
	font-family: helvetica, arial, sans-serif;
}
.grid2 > * {width: 50%;}
.grid3 > * {width: 33.333%;}
.grid4 > * {width: 25%;}
.grid5 > * {width: 20%;}
.grid6 > * {width: 16.667%;}
.grid8 > * {width: 12.5%;}
.grid10 > * {width: 10%;}
.grid12 > * {width: 8.333%;}

/* unequal grids (1-2, 2-1, 1-3 and 3-1) for 2 blocks */
.grid2-1 > *:first-child,
.grid1-2 > * + * { width: 66.666%; }
.grid1-2 > *:first-child,
.grid2-1 > * + * { width: 33.333%; }
.grid1-3 > *:first-child,
.grid3-1 > * + * { width: 25%; }
.grid3-1 > *:first-child,
.grid1-3 > * + * { width: 75%; }

/* Responsiv-o-matic */
@media (max-width: 1024px) {
	.grid5 > *,
	.grid6 > *,
	.grid8 > *,
	.grid10 > *,
	.grid12 > * {width: 33.333%}
}
@media (max-width: 768px) {
	.grid3 > *,
	.grid4 > *,
	.grid5 > *,
	.grid6 > *,
	.grid8 > *,
	.grid10 > *,
	.grid12 > * {width: 50%}
}
@media (max-width: 640px) {
	.grid > * > * {width: 100% !important}
}