How can I style this?

Hello,

I am looking to style this form, espacilly the Source languages section (where I would like columns). This CSS is working but is blacklisted in Podio:

[data-reactid=".0.0:$1.$language-pair.1"]{column-count: 6 !important;
column-width: 58px !important;}
.category-field.form-group.validation-group {
column-count: 3;
column-width: 227px;
}

What can I do? I have soo many rows at Source languages. Thank you.