@media (min-width: 768px) {
  .page-layout-2columns-left .columns { display: block; }
  .page-layout-2columns-left .sidebar-main {
    width: 25%; float: left; order: 1; padding-right: 2%; clear: left;
  }
  .page-layout-2columns-left .column.main {
    width: 75%; float: right; order: 2;
  }
  .page-layout-2columns-left .columns:after { content: ""; display: table; clear: both; }
}