please refer to 12th row in CSS at this link: http://jsfiddle.net/NLTf9/
in 12th row, I need at least .0743em border width to make it visible in Chrome and Opera last versions as of today. (I mean the borders of input and button)
for .0742em, borders are not visible. what I don't understand is 1em = 16px so 1px = .0625em and even .0742em > .0625em why the browser can't display the border?
what is the reason for this issue? Please aware that I use box-sizing: border-box; if it's important!
if reason is these browsers can't display if display width value < 1px so why .0743em = 1px here?
I think I don't know and missing some important equation here! can you please explain?
regards