This is column 1

This is column 2

This is column 3

.section {
clear: both;
padding: 0px;
margin: 0px;
}

/* COLUMN SETUP */
.col {
display: block;
float:left;
margin: 1% 0 1% 1.6%;
}
.col:first-child { margin-left: 0; }

/* GROUPING */
.group:before,
.group:after { content:""; display:table; }
.group:after { clear:both;}
.group { zoom:1; /* For IE 6/7 */ }

.span_3_of_3 { width: 100%; }
.span_2_of_3 { width: 66.13%; }
.span_1_of_3 { width: 32.26%; }

/* GO FULL WIDTH BELOW 480 PIXELS */
@media only screen and (max-width: 480px) {
.col { margin: 1% 0 1% 0%; }
.span_3_of_3, .span_2_of_3, .span_1_of_3 { width: 100%; }
}