I've created child themes before using the same method, but for some reason with Bootstrap3 themes (I've tried multiple) I can't override the CSS. I'm currently using this Flatty theme.
I'm thinking maybe the trouble comes from the fact that there is a style.css in the parent but the styles I'm attempting to change are in a css folder in a file called main.css. I've tried duplicating this folder and file as well, but no luck. I've also tried just putting the classes I want to change in my child style.css.
Any help would be greatly appreciated!