here is the bug photo--> http://prntscr.com/bec6un
Usually this message appears when your web browser's zoom setting is something other than 100%.
Why? : When you increase/decrease your zoom you also increase/decrease the size of elements on your page. So a 1px line might now be 3px.
What to do? : Often, resetting zoom to default will do the trick. You can reset it with cmd-0 (Mac) or ctrl-0 (PC).
You may need to experiment to get it right with your browser.
thnx you bro my browser zoom was 110%. today i learn something new
but why with prev course i was fine
If you point me to an exact exercise then I can have a look.
e..x from the beggining of course css