TB067

 % \documentclass[14pt]{extarticle}
 
 % page setup
 \usepackage[a4paper,
             top=2.5cm,
             bottom=2.5cm,
             left=2.00cm,
             right=2.00cm,
             bmargin=2.0cm]{geometry}
 
 \usepackage{titlesec}
 \usepackage{fontspec}
 \usepackage{tabularx}
 
 % make pictures caption font bold and small
 \usepackage[font={footnotesize,bf}]{caption}
 
 % inline code (backticks in md)
 \linespread{1.05}
 % \definecolor{bgcolor}{HTML}{e0e0e0}
 \definecolor{bgcolor}{HTML}{f8f8f8}
 \let\oldtexttt\texttt
 
 \renewcommand{\texttt}[1]{
     % \colorbox{bgcolor}{\oldtexttt{#1}}
     \tcbox[ on line,
             boxsep=1pt,
             left=0pt,
             right=0pt,
             top=0pt,
             bottom=0pt,
             arc=1pt,
             outer arc=1pt,
             grow to left by=2.5pt,
             grow to right by=2.5pt,
             colframe=bgcolor,
             colback=bgcolor]{\oldtexttt{#1}}
 }
 
 % code blocks
 \usepackage{verbatimbox}
 \newenvironment{fullgrayverb}
 {\verbbox}
 % {\endverbbox\par\colorbox{gray!25}{\parbox{\textwidth}{\theverbbox}}\par}
 {\endverbbox\par\colorbox{bgcolor}{\parbox{\textwidth}{\theverbbox}}\par}
 
 % change boldfont bold to extrabold
 % \setmainfont[
 %  BoldFont={Inter-ExtraBold}
 % ]{Inter}
 
 % change regular font to light font
 % \setmainfont{Inter light}
 
 \newfontfamily\titlefont{Inter}[
 UprightFont     =   *-Regular,
 BoldFont        =   *-ExtraBold,
 Scale           =   1.00
 ]
 
 \newfontfamily\sectionsfont{Inter}[
 UprightFont     =   *-Regular,
 BoldFont        =   *-Bold,
 ]
 
 \setmathfont{Fira Math}
 
 \usepackage{xcolor}
 \definecolor{ugrey}{HTML}{333333}
 
 \titleformat{\section}
 {\color{ugrey}\titlefont\LARGE\bfseries}
 {\color{ugrey}}
 {0em}
 {}
 
 \titleformat{\subsection}
 {\color{ugrey}\sectionsfont\Large\bfseries}
 {\color{ugrey}}
 {0em}
 {}
 
 \titleformat{\subsubsection}
 {\color{ugrey}\sectionsfont\large\bfseries}
 {\color{ugrey}}
 {0em}
 {}
 
 \titleformat{\paragraph}
 {\color{ugrey}\sectionsfont\normalsize\bfseries}
 {\color{ugrey}\theparagraph}
 {0em}
 {}
 
 \titleformat{\subparagraph}
 {\color{ugrey}\normalfont\bfseries}
 {\color{ugrey}\theparagraph}
 {0em}
 {}
 
 % spacing: how to read {12pt plus 4pt minus 2pt}
 %       12pt is what we would like the spacing to be
 %       plus 4pt means that TeX can stretch it by at most 4pt
 %       minus 2pt means that TeX can shrink it by at most 2pt
 %
 % \titlespacing{command}{left spacing}{before spacing}{after spacing}[right]
 
 \titlespacing*{\section}
 {0pt}{2ex plus 1ex minus .2ex}{1.75ex plus .2ex}
 
 \titlespacing*{\subsection}
 {0pt}{1.75ex plus 1ex minus .2ex}{1.5ex plus .2ex}
 
 \titlespacing*{\subsubsection}
 {0pt}{1.5ex plus 1ex minus .2ex}{1.25ex plus .2ex}
 
 \titlespacing*{\paragraph}
 {0pt}{1.5ex plus 1ex minus .2ex}{1.0ex plus .2ex}
 
 \titlespacing*{\subparagraph}
 {0pt}{1.25ex plus 1ex minus .2ex}{1.0ex plus .2ex}
 
 % spacing between formulas and text
 \setlength{\abovedisplayskip}{5pt}
 \setlength{\belowdisplayskip}{2pt}
 
 \setlength{\abovedisplayshortskip}{9pt}
 \setlength{\belowdisplayshortskip}{2pt}
 
 \setlength{\belowdisplayshortskip}{\belowdisplayskip}
 
 \setlength{\baselineskip}{10pt}
 
 % \usepackage{setspace}
 % \setstretch{1.25}
 
 % \renewcommand{\figurename}{Fig.}
 
 \usepackage{caption}
 \captionsetup{labelformat=empty}
 
 % \renewcommand{\contentsname}{Índice}
 \renewcommand\contentsname{\vspace*{-45pt}}
 
 % TOC dots separation
 % \renewcommand{\cftdotsep}{10}
 
 % \setlength{\cftsecindent}{0pt}% Remove indent for \section
 % \setlength{\cftsubsecindent}{5pt}% Remove indent for \subsection
 % \setlength{\cftsubsubsecindent}{0pt}% Remove indent for \subsubsec
 
 \setcounter{tocdepth}{4}
 
 \usepackage{titling}
 \renewcommand{\maketitle}{ 
     \begin{flushleft}
     {\bfseries\Huge\thetitle}
     \vspace{1mm}
     \end{flushleft}
     \thispagestyle{empty}
 }
 
 % remove the page number from all the pages that the TOC occupies
 \addtocontents{toc}{\protect\thispagestyle{empty}}
 
 % add page break after TOC set it to page number 1
 \let\oldtableofcontents\tableofcontents % remember the definition
 \renewcommand\tableofcontents{
     \oldtableofcontents % use the standard toc
     \thispagestyle{empty}
     \pagebreak
     \setcounter{page}{1}
 }
 
 % Set text color for all document
 % \color{ugrey}
 
 \usepackage[titles]{tocloft}
 \renewcommand{\cftdotsep}{1.5}
 \renewcommand{\cftsetpnumwidth}{1.5}
 \renewcommand{\cftsetrmarg}{1.5}
 
 \usepackage{float}
 \makeatletter
 \def\fps@figure{H}
 \makeatother
 
 % nicer chemical figures
 \usepackage{chemfig}
 
 % change style of quote, see also https://tex.stackexchange.com/a/436253/114857
 \usepackage[most]{tcolorbox}
 
 \definecolor{linequote}{RGB}{224,215,188}
 \definecolor{bordercolor}{RGB}{221,221,221}
 % \definecolor{backquote}{RGB}{249,245,233}
 \definecolor{backquote}{RGB}{230,230,230}
 
 % change left border: https://tex.stackexchange.com/a/475716/114857
 % change left margin: https://tex.stackexchange.com/a/457936/114857
 \newtcolorbox{myquote}[1][]{%
     enhanced,
     breakable,
     size=minimal,
     left=12pt,
     top=12pt,
     bottom=12pt,
     right=12pt,
     boxrule=1pt,
     sharp corners=all,
     % colback=backquote,
     colback=bgcolor,
     colframe=black,
     #1}
 
 % redefine quote environment to use the myquote environment, see
 % https://tex.stackexchange.com/a/337587/114857
 \renewenvironment{quote}{\begin{myquote}}{\end{myquote}}
 
 % better fractions
 \usepackage{nicefrac,xfrac}
 
 % surround footnotes number with square brackets and always use numbers (even
 % inside quoted text)
 % https://www.overleaf.com/learn/latex/Footnotes
 \renewcommand*{\thefootnote}{\ [\arabic{footnote}]\ }
 \renewcommand*{\thempfootnote}{\ [\arabic{mpfootnote}]\ }
 
 % space between text and footer
 \setlength\footskip{25pt}
 \setlength{\skip\footins}{12pt}
 
 % align first letter of all the lines in the footnotes
 \usepackage[bottomfloats,belowfloats,hang]{footmisc}
 \setlength{\footnotemargin}{1em}