(function($) {
    $(document).ready(function() {
        function customHeaderFixed(){
            $waypoint_selector = $('#main-content');
            $introDesktopHeight = $('.intro-desktop').height();
            $adminBar = $('#wpadminbar');

            if ($adminBar.length) {
                $introDesktopHeight = $introDesktopHeight - $adminBar.height();
            }

            $fullWidthMenu = $('.main_menu');

            $waypoint_selector.waypoint( {
                handler : function( direction ) {
                    if ( direction === 'down' ) {
                        $fullWidthMenu.addClass( 'wpc-fixed-menu' );
                        $('body').addClass('wpc-scrolled');
                        $('#about').css('padding-top', ($fullWidthMenu.height() + $adminBar.height() - 20));
                        if ( $(window).width() <= 980 ) {
                            $('#about').css('padding-top', ($fullWidthMenu.height() + $adminBar.height() - 20));
                            $('#joinus').css('padding-top', ($fullWidthMenu.height() + $adminBar.height()));
                            $('#visitus').css('padding-top', ($fullWidthMenu.height() + $adminBar.height()));
                            $('#contactus').css('padding-top', ($fullWidthMenu.height() + $adminBar.height()));
                        }
                    } else {
                        $fullWidthMenu.removeClass( 'wpc-fixed-menu' );
                        $('body').removeClass('wpc-scrolled');
                        $('#about').css('padding-top', 20);
                    }
                },
                offset: -$introDesktopHeight
            } );
        }
        setTimeout(customHeaderFixed, 100);
    });
})(jQuery);