You're using the classic version of the profiles. It's much easier to set up Wix on current profiles so that's what we wrote the code for. See that dropdown on the top left that says "classic"? Change that to "current". Then go to the profile, click edit profile, click the content button, and add a new media panel. Save, then delete all the other panels. Click edit on the media box and paste your media code in there. Update & save. Then go back to the page that you screenshotted and paste the CSS in the big box. (the small box should no longer be present - that's ok) You should paste the CSS last to make editing and deleting the panels easier.