Edit style.css

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Hello,

I have a really frustrating problem. I’m trying to edit styles.css but it seems to only contain the standard code from the theme. In firebug I located a code string that i’d like to edit but I can’t find it in the FTP program of in WP admin.

In firebug the css file is located here:

my-domain.com/wp-content/themes/responsive/style.css?ver=1.9.3.4

The closest thing I can find in my FTP-client is this:

my-domain.com/public_html/wp-content/themes/responsive/style.css

I have tried for hours trying to figure out how to find the right css file and edit it. I must be doing something wrong. The theme that I use is called Responsive and my domain is “elektroniskt.se”.

I would really appreciate if somebody could help me.

/Gustav