Prefix the classes and IDs in your custom CSS file with the project's abbreviation or initials. For example:
#EMAG_header{ .EMAG_sidebarTop{
} }
} }
#EMAG_leftColumn{ .EMAG_sidebarFill{
} }
#EMAG_rightColumn{ .EMAG_sidebarBtm{} }
} }
#EMAG_footer{ .EMAG_utilitylink{
} }