/*  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: 23.8%; 
}


/*  GO FULL WIDTH AT LESS THAN 480 PIXELS */

@media only screen and (max-width: 480px) {
    .span_4_of_4 {
	width: 100%; 
    }
    .span_3_of_4 {
	width: 100%; 
    }
    .span_2_of_4 {
	width: 100%; 
    }
    .span_1_of_4 {
	width: 100%; 
    }
}