vernaculars-come-to-matter/00_contributions/FINAL/layout/00_header.tex

\documentclass[a5, 10pt, twosides]{book}
\usepackage[utf8]{inputenc}
\usepackage{fontspec}
\usepackage{graphicx}
\usepackage{tikz}
\usepackage{fancyhdr} 
\usepackage{fontenc}[T1]
\usepackage[raggedright]{titlesec}
\usepackage{tocloft}
\usepackage{geometry}
\usepackage{setspace}
\usepackage{csquotes}
\usepackage{afterpage}
\usepackage{listings}
\usepackage{array} % for fixed width tables
\usepackage{tabularx} % for multiple alignments in cells
\usepackage[hang]{footmisc}
% \usepackage[a4,cross,pdftex,center]{crop} % cropmarks
\usepackage{perpage}
\usepackage{setspace}
\usepackage{hyphenat}
\usepackage{scrextend}
\usepackage{xcolor}
\usepackage{tcolorbox}
\usepackage{afterpage}
\usepackage{paralist}
\usepackage[vskip=12pt]{quoting}
\usepackage{caption}
\usepackage[hyphens]{url}
\usepackage{ltablex}
\usepackage{vcell}
\usepackage{float}
\usepackage{calc}

% CONFIGURE PACKAGES

\usetikzlibrary{positioning}
\RequirePackage{fix-cm}

\tcbuselibrary{skins}

\setlength\LTpre{12pt}
\setlength\LTpost{12pt}

% CONFIGURE PACKAGES > SIZE

\geometry{a5paper,left=24mm,top=12mm,bottom=20mm,right=16mm}

% COMMANDS

\let\endchangemargin=\endlist 
\setlength{\footnotemargin}{1em} % footnote space

% VARIABLES

\newcommand{\chapterfontsize}{24pt}
\newcommand{\chapterlineheight}{24pt}
\newcommand{\imgwidth}{\textwidth}
\newcommand{\imgdir}{00_contributions/FINAL/}
\newcommand{\ballsize}{6mm}

% VARIABLES > CHAPTER SIGNS

\newcommand{\chaptersignone}{*}
\newcommand{\chaptersigntwo}{†}
\newcommand{\chaptersignthree}{‡}
\newcommand{\chaptersignfour}{§}
\newcommand{\chaptersignfive}{¶}
\newcommand{\chaptersignsix}{¶}

% FONT-FACES

\setmainfont[Scale=0.95]{Arial}
\setsansfont[Scale=0.95]{Arial}
\setmonofont[Scale=0.95]{Courier}

\newfontfamily\sectionfont{Times}[ItalicFont    ={* Italic},
                    BoldFont      ={* Bold},
                    BoldItalicFont={* Bold Italic}]

% PAGE STYLES

% All pages

\pagestyle{fancy}
\fancyhf{}
\fancyhead[LE,RO]{}
\fancyhead[RE,LO]{}
\fancyfoot[CE,CO]{}
\fancyfoot[LE,RO]{\thepage}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}

% Chapter pages

\fancypagestyle{plain}{

	\fancyhf{} 
	\fancyfoot[LE,RO]{\fontsize{\chapterfontsize}{\chapterlineheight}\selectfont\bfseries\thepage}
	\fancyfoot[LO,RE]{\fontsize{\chapterfontsize}{\chapterlineheight}\selectfont\bfseries\thechapter}
	\renewcommand{\headrulewidth}{0pt}
	\renewcommand{\footrulewidth}{0pt}
	\renewcommand{\fontruleskip}{0}
	\renewcommand{\headruleskip}{0}
}

% COVER
\usetikzlibrary{positioning,fadings,through}
\definecolor{left} {HTML}{000000}
\title{''Titre du livre''}
\author{''Nom de l'auteur''}
\date{''date de fin de rédaction''} 

% CONTENTS
\renewcommand{\contentsname}{}
\renewcommand\cftchapfont{\bfseries}
\renewcommand\cftchappagefont{\bfseries}

% CHAPTER
\renewcommand{\chaptername}{}
\renewcommand{\thechapter}{\fnsymbol{chapter}}
\titleformat{\chapter}[block]{\bfseries\fontsize{\chapterfontsize}{\chapterlineheight}\selectfont}{\chaptername}{}{}
\titlespacing{\chapter}{0pt}{0pt}{0pt}

% SECTION
\renewcommand{\thesection}{\arabic{section}}
\titleformat{\section}{\sectionfont\fontsize{\chapterfontsize}{\chapterlineheight}\selectfont}{}{24pt}{}
\titlespacing{\section}{}{8pt}{12pt}{}

% SUBSECTION
\renewcommand{\thesubsection}{\arabic{subsection}}
\titleformat{\subsection}{\bfseries\fontsize{10pt}{12pt}\selectfont}{}{}{}
\titlespacing{\subsection}{}{12pt}{12pt}{}

% SUBSUBSECTION
\renewcommand{\thesubsubsection}{\arabic{subsubsection}}
\titleformat{\subsubsection}{\sectionfont\fontsize{11pt}{12pt}\selectfont}{}{}{}
\titlespacing{\subsubsection}{24pt}{12pt}{12pt}{}

% PARAGRAPHS
\setlength{\parindent}{2em}
\setlength{\parskip}{0}
\renewcommand{\baselinestretch}{1.0}

% CODE STYLE
\lstset{
aboveskip=3mm,
belowskip=3mm,
showstringspaces=false,
columns=flexible,
basicstyle={\small\ttfamily},
numbers=none,
numberstyle=\tiny,
keywordstyle=\bfseries,
commentstyle=
stringstyle=,
breaklines=true,
breakatwhitespace=true,
tabsize=3espace=true,
tabsize=3
}

\setlength{\textfloatsep}{0cm}


% FOOTNOTE

\begin{document}

\setlength{\baselineskip}{12pt}
\frenchspacing
\urlstyle{sf}
\tcbset{enhanced}

% CONTENTS
% \addtocontents{toc}{\protect\setcounter{tocdepth}{0}}
% \vspace*{-8\baselineskip}
% \tableofcontents{\thispagestyle{empty}}
% \clearpage{\thispagestyle{empty}\cleardoublepage}