/*  GRID OF FOUR   ============================================================================= */
.span_4_of_4 {
	width: 100%; 
}
.span_3_of_4 {
	width: 74.6%; 
}
.span_2_of_4 {
	width: 49.2%; 
}
.span_1_of_4 {
	width: 25%; 

}
/*  GO FULL WIDTH AT LESS THAN 640 PIXELS */
@media only screen and (min-width: 1000px) {
	.span_4_of_4 {
		width: 25%; 
	}
	.span_3_of_4 {
		width: 25%; 
	}
	.span_2_of_4 {
		width: 25%; 
	}
	.span_1_of_4 {
		width: 25%; 
	}
}
/*  GO FULL WIDTH AT LESS THAN 640 PIXELS */
@media only screen and (max-width: 999px) {
	.span_4_of_4 {
		width: 25%; 
	}
	.span_3_of_4 {
		width: 25%; 
	}
	.span_2_of_4 {
		width: 25%; 
	}
	.span_1_of_4 {
		width: 50%; 
	}
}
/*  GO FULL WIDTH AT LESS THAN 640 PIXELS */
@media only screen and (max-width: 640px) {
	.span_4_of_4 {
		width: 25%; 
	}
	.span_3_of_4 {
		width: 25%; 
	}
	.span_2_of_4 {
		width: 25%; 
	}
	.span_1_of_4 {
		width: 25%; 
	}
}
/*  GO FULL WIDTH AT LESS THAN 600 PIXELS */
@media only screen and (max-width: 600px) {
	.span_4_of_4 {
		width: 25%; 
	}
	.span_3_of_4 {
		width: 25%; 
	}
	.span_2_of_4 {
		width: 25%; 
	}
	.span_1_of_4 {
		width: 50%; 
	}
}

/*  GO FULL WIDTH AT LESS THAN 480 PIXELS */
@media only screen and (max-width: 480px) {
	.span_4_of_4 {
		width: 25%; 
	}
	.span_3_of_4 {
		width: 25%; 
	}
	.span_2_of_4 {
		width: 25%; 
	}
	.span_1_of_4 {
		width: 50%; 
	}
}

/*  GO FULL WIDTH AT LESS THAN 320 PIXELS */
@media only screen and (max-width: 320px) {
	.span_4_of_4 {
		width: 25%; 
	}
	.span_3_of_4 {
		width: 25%; 
	}
	.span_2_of_4 {
		width: 25%; 
	}
	.span_1_of_4 {
		width: 50%; 
	}
}