I have presented a cleaner way to do this here.
Also, a lot of code in the block above seems to be specific to Indigo‘s website. For example the theme doesn’t have a .login-box, #match_information or .fixturesbox selector. CSS rules inside those selector blocks won’t do anything for most websites.
You should use whatever setup works for you, I just wanted to present my solution and point out potential flaws in the solution above.