.b_table { display:table; }
.b_row { display:table-row; }
.b_col { display:table-cell; padding:0.25em 0px 0.5em 0px; verticval-align:top; }
.b_field { display:table-cell; padding:0.25em 0px 0.5em 0px; vertical-align:top; }
@media all and (max-width:640px) {
.b_table, .b_row, .b_col, .b_field { display:block; }
.b_col { padding-bottom:0em; }
.b_field { padding-top:0.125em; }
}