.one-half-column-left {
width:48%;
float:left;
}
.one-half-column-right {
width:48%;
float:right;
}
@media only screen and (max-width: 600px) {
.one-half-column-left, .one-half-column-right,
.one-third-column, .one-third-column-last {
float:none;
width:100%;
margin-right:0;
}
}
