I am not using the portean template, I am using a variation of the ocean template and there is no styles in this template. I tried to duplicate the portean template and alter the css to make my own styles and generally learn how things are done. but unfortunatley all the new template I created kept doing was  'duplicated error'. So i chose the ocean template that i could duplicate and create new templates/modules from. So that the orignal template would be untouched and the only thing i could break is my own template. That is why I need a way to insert my own CSS file so the template I am making is stand alone and does not mess up the orignal templates.