It keeps giving me this error: Oops, try again. It looks like your border-width isn't 1px.
I'm quite certain it is 1px though. Tried entering "border-width: 1px;" as an extra line but that doesn't work either.
I'm using Firefox 45.0.1 on Windows 8.1.
When I tried again using another computer (again Firefox 45.0.1 on Windows 8.1), I passed the lessons without problem. I'm sure I used exactly the same code since the one I wrote on my first computer was saved and I didn't change any of it on the second computer.
I then tried again with my first computer, but it still gave me the error.