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1 Answer

Justin Page
1,172 PointsYou need to create a style.css file
in your twentythirdchild/
or as the video shows, twentythirteenchild
folder and follow the video in designating the proper comments in order to associate child belonging to a parent theme.
If you are referring to parent style.css
. This would be located in twentythirteen\style.css
within your themes folder.