Hi there,

Parameters and Options > Custom CSS doesn't offer media grids because 99% of the users would not use that option, we try to keep only the options that users need and not bloat theme with many options.

If you want, you can add CSS code there and only select for example screen sizes  768 and  below.

/* Example */
@media screen and (max-width: 768px) {
    .your-selector {
        color: red;
    }
}

Kalium uses Bootstrap 3 media grids (read more).

(view on a new page)

I wish you a great day!

Hi there,

Sorry but this is a customization question and theme support doesn't offer customization services as we wrote on our support homepage and on this area.

If you're looking for professional help in this matter, there's always someone available for such tasks on the WP Kraken or Codeable. Pricing and timeline are always straightforward there and that's the main reason for recommending those services.

Thanks for your understanding!