Simple Grid (http://thisisdallas.github.com/Simple-Grid/) extended.

simplegrid.scss

/*
  Simple Grid
  Learn More - http://dallasbass.com/simple-grid-a-lightweight-responsive-css-grid/
  Project Page - http://thisisdallas.github.com/Simple-Grid/
  Author - Dallas Bass
  Site - dallasbass.com
*/

*, *:after, *:before {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
}

body {
	margin: 0px;
}

[class*='col-'] {
	float: left;
	padding-right: 30px; /* column-space */
}

.grid {
	width: 100%;
	max-width: 1140px;
	min-width: 755px;
	margin: 0 auto;
	overflow: hidden;
}

.grid:after {
	content: "";
	display: table;
	clear: both;
}

.grid-pad {
	padding-top: 20px;
	padding-left: 20px; /* grid-space to left */
	padding-right: 0px; /* grid-space to right: (grid-space-left - column-space) e.g. 20px-20px=0 */
}

.push-right {
	float: right;
}

.no-pad {
	padding-right: 0px;
}

.add-pad {
	padding-right: 20px !important;
	padding-left: 20px !important;
}

/* Content Columns */

.col-1-1 {
	width: 100%;
}
.col-2-3, .col-8-12 {
	width: 66.66%;
}

.col-1-2, .col-6-12 {
	width: 50%;
}

.col-1-3, .col-4-12 {
	width: 33.33%;
}

.col-1-4, .col-3-12 {
	width: 25%;
}

.col-1-5 {
	width: 20%;
}

.col-1-6, .col-2-12 {
	width: 16.667%;
}

.col-1-7 {
	width: 14.28%;
}

.col-1-8 {
	width: 12.5%;
}

.col-1-9 {
	width: 11.1%;
}

.col-1-10 {
	width: 10%;
}

.col-1-11 {
	width: 9.09%;
}

.col-1-12 {
	width: 8.33%
}

/* Layout Columns */

.col-11-12 {
	width: 91.66%
}

.col-10-12 {
	width: 83.333%;
}

.col-3-4, .col-9-12 {
	width: 75%;
}

.col-5-12 {
	width: 41.66%;
}

.col-7-12 {
	width: 58.33%
}



/* Pushing blocks */

.push-2-3, .push-8-12 {
	margin-left: 66.66%;
}

.push-1-2, .push-6-12 {
	margin-left: 50%;
}

.push-1-3, .push-4-12 {
	margin-left: 33.33%;
}

.push-1-4, .push-3-12 {
	margin-left: 25%;
}

.push-1-5 {
	margin-left: 20%;
}

.push-1-6, .push-2-12 {
	margin-left: 16.667%;
}

.push-1-7 {
	margin-left: 14.28%;
}

.push-1-8 {
	margin-left: 12.5%;
}

.push-1-9 {
	margin-left: 11.1%;
}

.push-1-10 {
	margin-left: 10%;
}

.push-1-11 {
	margin-left: 9.09%;
}

.push-1-12 {
	margin-left: 8.33%
}


/* ===========================================
    Mobile
   =============================================*/

@media handheld, only screen and (max-width: 767px) {
	.grid {
		width: 100%;
		min-width: 0;
		margin-left: 0px;
		margin-right: 0px;
		padding-left: 20px; /* grid-space to left */
		padding-right: 10px; /* grid-space to right: (grid-space-left - column-space) e.g. 20px-10px=10px */
	}
	
	[class*='col-'] {
		width: auto;
		float: none;
		margin-left: 0px;
		margin-right: 0px;
		margin-top: 10px;
		margin-bottom: 10px;
		padding-left: 0px;
		padding-right: 10px; /* column-space */
	}
	
	
	/* Mobile Layout */
	
	[class*='mobile-col-'] {
		float: left;
		margin-left: 0px;
		margin-right: 0px;
		margin-top: 0px;
		margin-bottom: 10px;
		padding-left: 0px;
		padding-right: 10px; /* column-space */
		padding-bottom: 0px;
	}
	
	.mobile-col-1-1 {
		width: 100%;
	}
	.mobile-col-2-3, .mobile-col-8-12 {
		width: 66.66%;
	}

	.mobile-col-1-2, .mobile-col-6-12 {
		width: 50%;
	}

	.mobile-col-1-3, .mobile-col-4-12 {
		width: 33.33%;
	}

	.mobile-col-1-4, .mobile-col-3-12 {
		width: 25%;
	}

	.mobile-col-1-5 {
		width: 20%;
	}

	.mobile-col-1-6, .mobile-col-2-12 {
		width: 16.667%;
	}

	.mobile-col-1-7 {
		width: 14.28%;
	}

	.mobile-col-1-8 {
		width: 12.5%;
	}

	.mobile-col-1-9 {
		width: 11.1%;
	}

	.mobile-col-1-10 {
		width: 10%;
	}

	.mobile-col-1-11 {
		width: 9.09%;
	}

	.mobile-col-1-12 {
		width: 8.33%
	}

	/* Layout Columns */

	.mobile-col-11-12 {
		width: 91.66%
	}

	.mobile-col-10-12 {
		width: 83.333%;
	}

	.mobile-col-9-12 {
		width: 75%;
	}

	.mobile-col-5-12 {
		width: 41.66%;
	}

	.mobile-col-7-12 {
		width: 58.33%
	}
	
	.hide-on-mobile {
		display: none !important;
		width: 0;
		height: 0;
	}
}


/* ===========================================
    Tablet
   =============================================*/

@media (min-width: 768px) and (max-width: 1029px) {

	.tablet-col-1-1 {
		width: 100%;
	}
	.tablet-col-2-3, .tablet-col-8-12 {
		width: 66.66%;
	}

	.tablet-col-1-2, .tablet-col-6-12 {
		width: 50%;
	}

	.tablet-col-1-3, .tablet-col-4-12 {
		width: 33.33%;
	}

	.tablet-col-1-4, .tablet-col-3-12 {
		width: 25%;
	}

	.tablet-col-1-5 {
		width: 20%;
	}

	.tablet-col-1-6, .tablet-col-2-12 {
		width: 16.667%;
	}

	.tablet-col-1-7 {
		width: 14.28%;
	}

	.tablet-col-1-8 {
		width: 12.5%;
	}

	.tablet-col-1-9 {
		width: 11.1%;
	}

	.tablet-col-1-10 {
		width: 10%;
	}

	.tablet-col-1-11 {
		width: 9.09%;
	}

	.tablet-col-1-12 {
		width: 8.33%
	}

	/* Layout Columns */

	.tablet-col-11-12 {
		width: 91.66%
	}

	.tablet-col-10-12 {
		width: 83.333%;
	}

	.tablet-col-9-12 {
		width: 75%;
	}

	.tablet-col-5-12 {
		width: 41.66%;
	}

	.tablet-col-7-12 {
		width: 58.33%
	}

}