fix css on header
fix css on header

OuiShare/OuiShare-Fest-2016,OuiShare/OuiShare-Fest-2016,OuiShare/OuiShare-Fest-Barcelona-2015-Staging,OuiShare/OuiShare-Fest-2016,OuiShare/OuiShare-Fest-Barcelona-2015-Staging,OuiShare/OuiShare-Fest-Barcelona-2015-Staging