/*  GRID OF THREE   ============================================================================= */

	
.span_3_of_3 {
	width: 100%; 
}

.span_2_of_3 {
	width: 66.13%; 
}

.span_1_of_3 {
	width: 32.26%; 
}

.col-vacias {
	width: calc((100% - 447px) / 2); 
}

.col-formulario {
	width: 431px; 
}
/*  GO FULL WIDTH AT LESS THAN 480 PIXELS */

@media only screen and (max-width: 480px) {
	.span_3_of_3 {
		width: 100%; 
	}
	.span_2_of_3 {
		width: 100%; 
	}
	.span_1_of_3 {
		width: 100%;
	}
	.col-formulario {
		float: none;
		margin: 0 auto;
		width: 90%;
	}
	.col-vacias {
		display: none;
		width: o;
	}
}