// Sticky Header
        $header = $('.header');
        var currentScroll = 0;
        var isWhite = $header.hasClass('header-white');

        $win.on('scroll', function() {
            if ( $win.scrollTop() > currentScroll && $win.scrollTop() != 0 ) {
                $header.addClass('header-hidden');

                if ( $win.scrollTop() > 50 ) {
                    $header.addClass('header-white');
                }
            } else {
                if ( $win.scrollTop() < 50 && !isWhite) {
                    $header.removeClass('header-white');
                }

                $header.removeClass('header-hidden');
            }

            currentScroll = $win.scrollTop();
        });