Remove sidebar, footer for mobile devices

@media handheld, only screen and (max-width: 979px) { #sidebar, #footer {display: none;} }

Link?

@media (max-width: 979px) {
aside.kad-sidebar, #containerfooter {display: none;}
}

Kadence Themes

Was this removed in later versions? I’m trying to do the opposite, I want footers on my mobile version, but can’t seem to figure out how to get them to appear.