Open the readme-style-code.css in your text editor (notepad) and copy all the text (css code) within this file. Then open your WordPress theme directory and you'll see a file name style.css, open this again using your text editor (notepad) then paste into the file, make sure you pasted into a free spot within the style sheet.
Alternatively you can paste the css code within your WordPress administration area, under 'Presentation' -> 'Theme' -> 'Theme Editor' -> click 'Stylesheet' from the list and paste into a free spot within the 'Editing' area, then click the 'Update File' button.




