Wrong code in terminal

I have a question that I can't find an answer for.

I entered input:focus { outline: none; } into terminal trying to get rid of the blue glow input box on some webpages. The result in terminal was -bash: syntax error near unexpected token `}' and nothing actually changed in safari (blue box still there) . My question is what does that code mean and does my computer now have a bad line of code, and if it does how do I get rid of the bad code?

Please help me. Thank you