%% --------------- Headings setup --------------------------------------

 \RequirePackage{fancyhdr}

 \pagestyle{fancy}

 \@ifundefined{chapter}%

    {}%

 	 {\renewcommand{\chaptermark}[1]{%

 			\ifthenelse{\value{chapter} < 1}%

 				{\markboth{#1}{}}%

 				{\markboth{\thechapter.\ #1}{}}

 		}}

 \addtolength{\headheight}{\baselineskip}

 \renewcommand{\headrulewidth}{0pt} %% thin line under header

 %\renewcommand{\headrulewidth}{0.4pt} %% no line under header

 \renewcommand{\footrulewidth}{0pt}

 \fancyhf{}                            %% Clear all fields.

 %\fancyhead[LE,RO]{\sffamily\thepage} %{\bf \rightmark}

 %\fancyhead[LO,RE]{\sffamily\nouppercase{\leftmark}}  %{\slshape \leftmark}

 \fancyhead[R]{\sffamily\thepage} %{\bf \rightmark}

 \fancyhead[L]{\sffamily\nouppercase{\leftmark}}  %{\slshape \leftmark}

 \fancypagestyle{plain}{%

 	\fancyhf{} % clear all header and footer fields

 	\fancyfoot[C]{\sffamily\thepage} % except the center

 	\renewcommand{\headrulewidth}{0pt}

 	\renewcommand{\footrulewidth}{0pt}

 }