.columns-responsive{-moz-columns:1;-moz-column-count:1;column-count:1}@media (min-width:390px){.columns-responsive{-moz-columns:2;-moz-column-count:2;column-count:2}}@media (min-width:667px){.columns-responsive{-moz-columns:3;-moz-column-count:3;column-count:3}}@media (min-width:992px){.columns-responsive{-moz-columns:4;-moz-column-count:4;column-count:4}}