Set the gap size between rows on desktop (1960px+), laptop (up to 1280px), tablet (up to 980px), and mobile (up to 640px)
matrix:row_gap(STRING on_desktop: "1.25em"
, STRING on_laptop: "1em"
, STRING on_tablet: "0.75em"
, STRING on_mobile: "0.5em")
matrix:row_gap("10px", "5%", "1vh", "0em")