media queries visual bar
When I use em for media queries, the GUI or the visual bar doesn't represent the measurement right.
for example, I set the media query on (min-width: 40em) which is equal to 640px. but the visual bar represent them wrong at 960px.
and the list goes on if i add more media queries, non of them are represented right but the desired effect for my css is right when i move the slider right and left , the live preview is correct, only the visual bar representation.