how to change/apply a style/styleName in a Mosaic page

Hello,
I 'am tryingto set upa page foracomposite application.
I usedthepanelcomplex type ("<view:Panellabel="ComplexPanel"styleName="TabbedPanelStyle">")and I would liketo knowhow I canchange thestyleName(custom)or evencreate my ownstyle sheetand apply it tomymashuppage.
Isthat possible?if so how?
andwhere isthe differentattributes of"styleName"?
Thank you in advance