.span_3_of_3{width: 1%;}
.span_2_of_3{width: 1%;}
.span_1_of_3{width: 97%;}
@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%;}
}