%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% THIS FILE HAS BEEN MODIFIED FOR USE IN STELLARIUM
% The Legrand Orange Book
% Structural Definitions File
% Version 2.1.1 (14/07/16)
%
% Original author:
% Mathias Legrand (legrand.mathias@gmail.com) with modifications by:
% Vel (vel@latextemplates.com)
% Alexander Wolf (alex.v.wolf@gmail.com)
% Georg Zotti (georg.zotti@univie.ac.at)
% 
% This file has been downloaded from:
% http://www.LaTeXTemplates.com
%
% License:
% CC BY-NC-SA 3.0 (http://creativecommons.org/licenses/by-nc-sa/3.0/)
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%----------------------------------------------------------------------------------------
%	VARIOUS REQUIRED PACKAGES AND CONFIGURATIONS
%----------------------------------------------------------------------------------------
\usepackage[top=3cm,bottom=3cm,left=3cm,right=3cm,headsep=10pt,a4paper]{geometry} % Page margins
\usepackage{ifpdf}
% We want to create PDF and HTML. Some alternatives are required.
% https://tex.stackexchange.com/questions/93852/what-is-the-correct-way-to-check-for-latex-pdflatex-and-html-in-the-same-latex

\ifpdf
  \usepackage{graphicx} % Required for including pictures
\else % processed with htlatex?
  \usepackage[dvipdfmx]{graphicx} % Required for including pictures POSSIBLY some other option?
\fi
\graphicspath{{pictures/}} % Specifies the directory where pictures are stored

\usepackage{tikz} % Required for drawing custom shapes
\usepackage{longtable}
\usepackage{tabularx}
%\usepackage{tabu} % tabu makes problems with htlatex, sorry.
\usepackage{gensymb}
\usepackage[english]{babel} % English language/hyphenation

\usepackage{enumitem} % Customize lists
\setlist{nolistsep} % Reduce spacing between bullet points and numbered lists

\usepackage{booktabs} % Required for nicer horizontal rules in tables

\usepackage{xcolor} % Required for specifying colors by name
\definecolor{ocre}{RGB}{51,153,255} % Define the color used for highlighting throughout the book

\usepackage{color}
\usepackage{listings}
\usepackage{rotating} % Allow sidewaysfigure
\usepackage{fancyvrb}% provides \VerbatimFootnotes


%----------------------------------------------------------------------------------------
%	NEW COMMANDS AND ADDITIONS
%----------------------------------------------------------------------------------------

% Emergency definition as this is not in MiKTeX.
\makeatletter
%\DeclareRobustCommand*
\providecommand\textsubscript[1]{%
  \@textsubscript{\selectfont#1}}
\def\@textsubscript#1{%
  {\m@th\ensuremath{_{\mbox{\fontsize\sf@size\z@#1}}}}}
\makeatother


%% GZ: some typesetting macros given here once are better than immediate formatting.

%% File names. 
\newcommand{\file}[1]{\texttt{#1}}
%% Parameters for some programs. Only tt seems meaningful.
\newcommand{\parameter}[1]{\texttt{#1}}
%% Map keys.
\newcommand{\keymap}[1]{\texttt{#1}}
%% console commands, CLI arguments, etc.
\newcommand{\command}[1]{\texttt{#1}}
%% Names of 3rd-party software products like Photoshop, Sketchup etc. Not for OS names, they are too common. 
%% The footnotesize is required for a better size match.
\ifpdf
\newcommand{\program}[1]{\textsf{\textbf{\footnotesize #1}}}
\else
\newcommand{\program}[1]{\textsf{\textbf{#1}}}
\fi
\newcommand{\var}[1]{\texttt{#1}} %% variable name

%% Color boxes for config.ini 
\newcommand{\ccbox}[1]{#1\quad\colorbox[rgb]{#1}{\makebox(8,8){}}}
%% Color boxes for descriptions
\newcommand{\ccboxdsc}[1]{\colorbox[rgb]{#1}{\makebox(4,4){}}}

% show small icon in-line. Lower by #2. Optional #1 is scale of icon. Use 0.45 for dialog icons, 0.75 for lower bar buttons.
% Note that it's not possible to use \baselineskip. In Tabular environments this seems to be 0.
% htlatex apparently has issues with the raisebox. Just draw a box around the icon.
\ifpdf
\newcommand{\guibutton[3]}[0.45]{\raisebox{-#2mm}{\fbox{\includegraphics[scale=#1]{#3}}}}
\else
\newcommand{\guibutton[3]}[0.45]{\fbox{\includegraphics[scale=#1]{#3}}}
\fi
% Will become a boxed text, representing a GUI button label.
%\newcommand{\button}[1]{\fbox{\textbf{\textsf{\scriptsize #1}}}}
% V1.0: Better use menu
\newcommand{\button}[1]{\menu{#1}}
%% Person names. In some places they have been italicised, in others bold. Make them appear the same with this, and add them to the index.
%% Names should be given with First names and surnames like \name[Johann]{Bayer}. The index will be built sorted by entry surnames.
%% Unfortunately, these cause problems (Ugly rendering, and Stack size exceeded) with tex4ht. But we don't have an index in the HTML version, so just ignore.
\ifhtlatex
\newcommand{\name}[2][]{\textbf{#2}}
\newcommand{\indexterm}[2][]{\emph{#2}}
\else
\newcommand{\name}[2][]{%
	\ifthenelse{\equal{#1}{}}{\textsc{#2}\index{#2}}%
	                         {\textsc{#1 #2}\index{#2, #1}}}
%% Some new term that is presented here with emphasis and also goes immediately to the index. 
%% If you want to have a different argument for the index command, use an optional first argument here. (E.g. different capitalisation, or index structuring, ...)
%\newcommand{\indexterm}[1]{\emph{#2}\index{#2}}
\newcommand{\indexterm}[2][]{%
	\ifthenelse{\equal{#1}{}}{\emph{#2}\index{#2}}{\emph{#2}\index{#1}}}
\fi	
	
	
	
	
%% This will avoid overshooting of the margin notes out of the page.
\setlength{\marginparwidth}{0.6\marginparwidth}
%% A command to show the version number when a feature was introduced in the margin.
%% Inside, give ONLY the version number like \newFeature{0.21.2}
%% TODO Decide on formatting etc.
%% Starting with the 1.0 release, we suppress marginpar notes of new features for version hints starting with 0. 
\usepackage{xstring}
\newcommand{\newFeature}[1]{%
\IfBeginWith{\StelVersion}{0}%
        {\marginpar{\centering{\small v #1}}}%
        {\IfBeginWith{#1}{0}%
                {}% Gobble content of 0.x numbers
                {\marginpar{\centering{\small v #1}}}}}

%% A few units. Add what you need in the same style here.
\newcommand{\m}{\ensuremath{\,\mathrm{m}}}
\newcommand{\cm}{\ensuremath{\,\mathrm{cm}}}
\newcommand{\mm}{\ensuremath{\,\mathrm{mm}}}
\newcommand{\km}{\ensuremath{\,\mathrm{km}}}
\newcommand{\um}{\ensuremath{\,\mathrm{\mu m}}}
\newcommand{\AU}{\ensuremath{\,\mathrm{AU}}}
\newcommand{\LY}{\ensuremath{\,\mathrm{LY}}}
\newcommand{\pc}{\ensuremath{\,\mathrm{pc}}}
\newcommand{\kpc}{\ensuremath{\,\mathrm{kpc}}}
\newcommand{\Mpc}{\ensuremath{\,\mathrm{Mpc}}}
\newcommand{\Hz}{\ensuremath{\,\mathrm{Hz}}}
\newcommand{\MHz}{\ensuremath{\,\mathrm{MHz}}}
\newcommand{\mJy}{\ensuremath{\,\mathrm{mJy}}}
\newcommand{\kg}{\ensuremath{\,\mathrm{kg}}}
\newcommand{\g}{\ensuremath{\,\mathrm{g}}}
\newcommand{\px}{\ensuremath{\,\mathrm{px}}} % pixels
\newcommand{\cy}{\ensuremath{\,\mathrm{cy}}} % century
\newcommand{\cdpmQ}{\ensuremath{\,\mathrm{cd}/\mathrm{m}^2}} % candela


% Define JavaScript for script listings
% Taken from https://tex.stackexchange.com/questions/89574/language-option-supported-in-listings
%\definecolor{lightgray}{rgb}{.9,.9,.9}
\definecolor{darkgray}{rgb}{.4,.4,.4}
%\definecolor{purple}{rgb}{0.65, 0.12, 0.82}
\lstdefinelanguage{JavaScript}{
   basicstyle=\fontfamily{pcr}\selectfont,
%  keywords={break, case, catch, continue, debugger, default, delete, do, else, false, finally, for, function, if, in, instanceof, new, null, return, switch, this, throw, true, try, typeof, var, void, while, with},
% The following includes TypeScript
  keywords={abstract, any, as, boolean, break, case, catch, class, console, 
    const, continue, debugger, declare, default, delete, do, else, enum, export, 
    extends, false, finally, for, from, function, get, if, implements, import, in, 
    infer, instanceof, interface, keyof, let, module, namespace, never, new, null, 
    number, object, package, private, protected, public, readonly, require, return, 
    set, static, string, super, switch, symbol, this, throw, true, try, type, typeof, 
    undefined, unique, unknown, var, void, while, with, yield},
  morecomment=[l]{//},
  morecomment=[s]{/*}{*/},
  morestring=[b]',
  morestring=[b]",
  keepspaces=true,%
  showstringspaces=false,
  escapeinside={(*}{*)},%
  keywords=[2]{class, export, boolean, throw, implements, import, this},
  keywordstyle=\color{green!40!black}\bfseries, % or blue in the example.
  keywordstyle=[2]\color{darkgray}\bfseries,
  identifierstyle=\color{blue},
  commentstyle=\color{purple!40!black}\ttfamily,
  stringstyle=\color{orange}\ttfamily,
  sensitive=true
}

% It seems the lstenvironments are much too complicated or need big efforts for decorating in HTML/CSS. Just replace by something simpler.
% We must repeat the same definitions with small and scriptsize (executed in PDF only), and later remove the optional size argument. 							 
\ifhtlatex
\DefineVerbatimEnvironment{commands}{Verbatim}{numbers=left,numbersep=2mm,frame=lines,framerule=1pt}
\DefineVerbatimEnvironment{commandsScr}{Verbatim}{numbers=left,numbersep=2mm,frame=lines,framerule=1pt}
\DefineVerbatimEnvironment{configfile}{Verbatim}{frame=single}
\DefineVerbatimEnvironment{configfileScr}{Verbatim}{frame=single}
\DefineVerbatimEnvironment{script}{Verbatim}{numbers=left,frame=single}
\else
\lstnewenvironment{commands}[1][\small]{\lstset{language=sh,basicstyle=\ttfamily#1,showstringspaces=false,%
                                     backgroundcolor=\color{black!5},frame=leftline,rulecolor=\color{blue},framerule=1pt}%
                             }{}%
\lstnewenvironment{commandsScr}[1][\scriptsize]{\lstset{language=sh,basicstyle=\ttfamily#1,showstringspaces=false,%
                                     backgroundcolor=\color{black!5},frame=leftline,rulecolor=\color{blue},framerule=1pt}%
                             }{}%
\lstnewenvironment{configfile}[1][\small]{\lstset{language=sh,basicstyle=\ttfamily#1,showstringspaces=false,%
                                   backgroundcolor=\color{black!5},frame=shadowbox,rulecolor=\color{blue},framerule=1pt}%
                             }{}%
\lstnewenvironment{configfileScr}[1][\scriptsize]{\lstset{language=sh,basicstyle=\ttfamily#1,showstringspaces=false,%
                                   backgroundcolor=\color{black!5},frame=shadowbox,rulecolor=\color{blue},framerule=1pt}%
                             }{}%
\lstnewenvironment{script}{\lstset{language=JavaScript,                   
                               backgroundcolor=\color{black!5},%
                               frame=leftline,%
                               rulecolor=\color{blue},%
                               framerule=1pt}%
                         }{}%
\fi
%% Allow chapter authors where this seems appropriate.
%% From http://tex.stackexchange.com/questions/156862/displaying-author-for-each-chapter-in-book
\usepackage{suffix}

\newcommand\chapterauthor[1]{\authortoc{#1}\printchapterauthor{#1}}
\WithSuffix\newcommand\chapterauthor*[1]{\printchapterauthor{#1}}

\newcommand\sectionauthor[1]{\authortoc{#1}\printsectionauthor{#1}}
\WithSuffix\newcommand\sectionauthor*[1]{\printsectionauthor{#1}}

\makeatletter
\ifhtlatex
\newcommand{\printchapterauthor}[1]{%
  {\parindent0pt\vspace*{-25pt}%
  \linespread{1.1}\large#1%
  \par\nobreak\vspace*{35pt}}
  \@afterheading%
}
\newcommand{\authortoc}[1]{%
  \addtocontents{toc}{\vskip-10pt}%
  \addtocontents{toc}{%
    \protect\contentsline{chapter}%
    {\hskip1.3em\mdseries\protect\scriptsize#1}{}{}}
  \addtocontents{toc}{\vskip5pt}%
}
\newcommand{\printsectionauthor}[1]{%
  {\parindent0pt\vspace*{-5pt}%
  \linespread{1.1}\large#1%
  \par\nobreak\vspace*{15pt}}
  \@afterheading%
}
\else
\newcommand{\printchapterauthor}[1]{%
  {\parindent0pt\vspace*{-25pt}%
  \linespread{1.1}\large\scshape#1%
  \par\nobreak\vspace*{35pt}}
  \@afterheading%
}
\newcommand{\authortoc}[1]{%
  \addtocontents{toc}{\vskip-10pt}%
  \addtocontents{toc}{%
    \protect\contentsline{chapter}%
    {\hskip1.3em\mdseries\scshape\protect\scriptsize#1}{}{}}
  \addtocontents{toc}{\vskip5pt}%
}
\newcommand{\printsectionauthor}[1]{%
  {\parindent0pt\vspace*{-5pt}%
  \linespread{1.1}\large\scshape#1%
  \par\nobreak\vspace*{15pt}}
  \@afterheading%
}
\fi
\makeatother

%----------------------------------------------------------------------------------------
%	FONTS
%----------------------------------------------------------------------------------------

\usepackage{avant} % Use the Avantgarde font for headings
%\usepackage{times} % Use the Times font for headings
\usepackage{mathptmx} % Use the Adobe Times Roman as the default text font together with math symbols from the Symbol, Chancery and Computer Modern fonts

\usepackage{microtype} % Slightly tweak font spacing for aesthetics
\usepackage[utf8]{inputenc} % Required for including letters with accents
\usepackage[T1]{fontenc} % Use 8-bit encoding that has 256 glyphs
\usepackage{newunicodechar} % Must be loaded after [utf8]inputenc
\newunicodechar{°}{\degree}
% It seems Ubuntu on Windows10 has a bit outdated utf8 inputenc? https://tex.stackexchange.com/questions/13067/utf8x-vs-utf8-inputenc
% But all is OK in TeXLive2017.
%\newunicodechar{ē}{\=e}
%\newunicodechar{ū}{\=u}

%----------------------------------------------------------------------------------------
%	BIBLIOGRAPHY AND INDEX
%----------------------------------------------------------------------------------------

\usepackage{csquotes} % recommended when using biblatex and babel
%\usepackage[style=numeric,citestyle=numeric,sorting=nyt,sortcites=true,autopunct=true,autolang=hyphen,hyperref=true,abbreviate=false,backref=true,backend=biber]{biblatex}
\usepackage[style=authoryear-comp,citestyle=authoryear,natbib=true,sorting=nyt,sortcites=true,autopunct=true,autolang=hyphen,hyperref=true,abbreviate=false,backref=true,backend=biber]{biblatex}
\addbibresource{guide.bib} % BibTeX bibliography file
\defbibheading{bibempty}{}
% This command prints >>title (name, year)<< for more extensive citations.
\newcommand{\citetp}[1]{\citetitle{#1} \citep{#1}}
% NOTE on citations: we have several options, provided with the natbib compatibility interface.
% \citet  --> Zotti and Wolf (2017)
% \citep  --> (Zotti and Wolf, 2017)
% \cite   --> Zotti and Wolf, 2017
% \citetp --> Stellarium User Guide (Zotti and Wolf, 2017)


\usepackage{calc} % For simpler calculation - used for spacing the index letter headings correctly

\ifhtlatex
% We don't have an index in HTML version. If anybody want to play with it, go for it...
\else
\usepackage{makeidx} % Required to make an index
\makeindex % Tells LaTeX to create the files required for indexing
\fi

%----------------------------------------------------------------------------------------
%	MAIN TABLE OF CONTENTS
%----------------------------------------------------------------------------------------

\usepackage{titletoc} % Required for manipulating the table of contents

\contentsmargin{0cm} % Removes the default margin

% Part text styling
\titlecontents{part}[0cm]
{\addvspace{20pt}\centering\large\bfseries}
{}
{}
{}

% Chapter text styling
\titlecontents{chapter}[1.35cm] % Indentation
{\addvspace{12pt}\large\sffamily\bfseries} % Spacing and font options for chapters
{\color{ocre!60}\contentslabel[\Large\thecontentslabel]{1.35cm}\color{ocre}} % Chapter number
{\color{ocre}}  
{\color{ocre!60}\normalsize\;\titlerule*[.5pc]{.}\;\thecontentspage} % Page number

% Section text styling
\titlecontents{section}[1.35cm] % Indentation
{\addvspace{3pt}\sffamily\bfseries} % Spacing and font options for sections
{\contentslabel[\thecontentslabel]{1.35cm}} % Section number
{}
{\hfill\color{black}\thecontentspage} % Page number
[]

% Subsection text styling
\titlecontents{subsection}[1.35cm] % Indentation
{\addvspace{1pt}\sffamily\small} % Spacing and font options for subsections
{\contentslabel[\thecontentslabel]{1.35cm}} % Subsection number
{}
{\ \titlerule*[.5pc]{.}\;\thecontentspage} % Page number
[]

% List of figures
\titlecontents{figure}[0em]
{\addvspace{-5pt}\sffamily}
{\thecontentslabel\hspace*{1em}}
{}
{\ \titlerule*[.5pc]{.}\;\thecontentspage}
[]

% List of tables
\titlecontents{table}[0em]
{\addvspace{-5pt}\sffamily}
{\thecontentslabel\hspace*{1em}}
{}
{\ \titlerule*[.5pc]{.}\;\thecontentspage}
[]

%----------------------------------------------------------------------------------------
%	MINI TABLE OF CONTENTS IN PART HEADS
%----------------------------------------------------------------------------------------

% Chapter text styling
\titlecontents{lchapter}[0em] % Indenting
{\addvspace{15pt}\large\sffamily\bfseries} % Spacing and font options for chapters
{\color{ocre}\contentslabel[\Large\thecontentslabel]{1.25cm}\color{ocre}} % Chapter number
{}  
{\color{ocre}\normalsize\sffamily\bfseries\;\titlerule*[.5pc]{.}\;\thecontentspage} % Page number

% Section text styling
\titlecontents{lsection}[0em] % Indenting
{\sffamily\small} % Spacing and font options for sections
{\contentslabel[\thecontentslabel]{1.25cm}} % Section number
{}
{}

% Subsection text styling
\titlecontents{lsubsection}[.5em] % Indentation
{\normalfont\footnotesize\sffamily} % Font settings
{}
{}
{}

%----------------------------------------------------------------------------------------
%	PAGE HEADERS
%----------------------------------------------------------------------------------------

\usepackage{fancyhdr} % Required for header and footer configuration

\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{\markboth{\sffamily\normalsize\bfseries\chaptername\ \thechapter.\ #1}{}} % Chapter text font settings
\renewcommand{\sectionmark}[1]{\markright{\sffamily\normalsize\thesection\hspace{5pt}#1}{}} % Section text font settings
\fancyhf{} \fancyhead[LE,RO]{\sffamily\normalsize\thepage} % Font setting for the page number in the header
\fancyhead[LO]{\rightmark} % Print the nearest section name on the left side of odd pages
\fancyhead[RE]{\leftmark} % Print the current chapter name on the right side of even pages
\renewcommand{\headrulewidth}{0.5pt} % Width of the rule under the header
\addtolength{\headheight}{2.75pt} % Increase the spacing around the header slightly
\renewcommand{\footrulewidth}{0pt} % Removes the rule in the footer
\fancypagestyle{plain}{\fancyhead{}\renewcommand{\headrulewidth}{0pt}} % Style for when a plain pagestyle is specified

% Removes the header from odd empty pages at the end of chapters
\makeatletter
\renewcommand{\cleardoublepage}{
\clearpage\ifodd\c@page\else
\hbox{}
\vspace*{\fill}
\thispagestyle{empty}
\newpage
\fi}

%----------------------------------------------------------------------------------------
%	THEOREM STYLES
%----------------------------------------------------------------------------------------

\usepackage{amsmath,amsfonts,amssymb,amsthm} % For math equations, theorems, symbols, etc

\newcommand{\intoo}[2]{\mathopen{]}#1\,;#2\mathclose{[}}
\newcommand{\ud}{\mathop{\mathrm{{}d}}\mathopen{}}
\newcommand{\intff}[2]{\mathopen{[}#1\,;#2\mathclose{]}}
\newtheorem{notation}{Notation}[chapter]

% Boxed/framed environments
\newtheoremstyle{ocrenumbox}% % Theorem style name
{0pt}% Space above
{0pt}% Space below
{\normalfont}% % Body font
{}% Indent amount
{\small\bf\sffamily\color{ocre}}% % Theorem head font
{\;}% Punctuation after theorem head
{0.25em}% Space after theorem head
{\small\sffamily\color{ocre}\thmname{#1}\nobreakspace\thmnumber{\@ifnotempty{#1}{}\@upn{#2}}% Theorem text (e.g. Theorem 2.1)
\thmnote{\nobreakspace\the\thm@notefont\sffamily\bfseries\color{black}---\nobreakspace#3.}} % Optional theorem note
\renewcommand{\qedsymbol}{$\blacksquare$}% Optional qed square

\newtheoremstyle{blacknumex}% Theorem style name
{5pt}% Space above
{5pt}% Space below
{\normalfont}% Body font
{} % Indent amount
{\small\bf\sffamily}% Theorem head font
{\;}% Punctuation after theorem head
{0.25em}% Space after theorem head
{\small\sffamily{\tiny\ensuremath{\blacksquare}}\nobreakspace\thmname{#1}\nobreakspace\thmnumber{\@ifnotempty{#1}{}\@upn{#2}}% Theorem text (e.g. Theorem 2.1)
\thmnote{\nobreakspace\the\thm@notefont\sffamily\bfseries---\nobreakspace#3.}}% Optional theorem note

\newtheoremstyle{blacknumbox} % Theorem style name
{0pt}% Space above
{0pt}% Space below
{\normalfont}% Body font
{}% Indent amount
{\small\bf\sffamily}% Theorem head font
{\;}% Punctuation after theorem head
{0.25em}% Space after theorem head
{\small\sffamily\thmname{#1}\nobreakspace\thmnumber{\@ifnotempty{#1}{}\@upn{#2}}% Theorem text (e.g. Theorem 2.1)
\thmnote{\nobreakspace\the\thm@notefont\sffamily\bfseries---\nobreakspace#3.}}% Optional theorem note

% Non-boxed/non-framed environments
\newtheoremstyle{ocrenum}% % Theorem style name
{5pt}% Space above
{5pt}% Space below
{\normalfont}% % Body font
{}% Indent amount
{\small\bf\sffamily\color{ocre}}% % Theorem head font
{\;}% Punctuation after theorem head
{0.25em}% Space after theorem head
{\small\sffamily\color{ocre}\thmname{#1}\nobreakspace\thmnumber{\@ifnotempty{#1}{}\@upn{#2}}% Theorem text (e.g. Theorem 2.1)
\thmnote{\nobreakspace\the\thm@notefont\sffamily\bfseries\color{black}---\nobreakspace#3.}} % Optional theorem note
\renewcommand{\qedsymbol}{$\blacksquare$}% Optional qed square
\makeatother

% Defines the theorem text style for each type of theorem to one of the three styles above
\newcounter{dummy} 
\numberwithin{dummy}{section}
\theoremstyle{ocrenumbox}
\newtheorem{theoremeT}[dummy]{Theorem}
\newtheorem{problem}{Problem}[chapter]
\newtheorem{exerciseT}{Exercise}[chapter]
\theoremstyle{blacknumex}
\newtheorem{exampleT}{Example}[chapter]
\theoremstyle{blacknumbox}
\newtheorem{vocabulary}{Vocabulary}[chapter]
\newtheorem{definitionT}{Definition}[section]
\newtheorem{corollaryT}[dummy]{Corollary}
\theoremstyle{ocrenum}
\newtheorem{proposition}[dummy]{Proposition}

%----------------------------------------------------------------------------------------
%	DEFINITION OF COLORED BOXES
%----------------------------------------------------------------------------------------
\RequirePackage[framemethod=default]{mdframed} % Required for creating the theorem, definition, exercise and corollary boxes

% Theorem box
\newmdenv[skipabove=7pt,
skipbelow=7pt,
backgroundcolor=black!5,
linecolor=ocre,
innerleftmargin=5pt,
innerrightmargin=5pt,
innertopmargin=5pt,
leftmargin=0cm,
rightmargin=0cm,
innerbottommargin=5pt]{tBox}

% Config box
\newmdenv[skipabove=7pt,
skipbelow=7pt,
rightline=false,
leftline=true,
topline=false,
bottomline=false,
backgroundcolor=black!5,
linecolor=ocre,
innerleftmargin=5pt,
innerrightmargin=5pt,
innertopmargin=5pt,
innerbottommargin=5pt,
leftmargin=0cm,
rightmargin=0cm,
linewidth=1pt]{wBox}

% Exercise box	  
\newmdenv[skipabove=7pt,
skipbelow=7pt,
rightline=false,
leftline=true,
topline=false,
bottomline=false,
backgroundcolor=ocre!10,
linecolor=ocre,
innerleftmargin=5pt,
innerrightmargin=5pt,
innertopmargin=5pt,
innerbottommargin=5pt,
leftmargin=0cm,
rightmargin=0cm,
linewidth=4pt]{eBox}	

% Definition box
\newmdenv[skipabove=7pt,
skipbelow=7pt,
rightline=false,
leftline=true,
topline=false,
bottomline=false,
linecolor=ocre,
innerleftmargin=5pt,
innerrightmargin=5pt,
innertopmargin=0pt,
leftmargin=0cm,
rightmargin=0cm,
linewidth=4pt,
innerbottommargin=0pt]{dBox}	

% Corollary box
\newmdenv[skipabove=7pt,
skipbelow=7pt,
rightline=false,
leftline=true,
topline=false,
bottomline=false,
linecolor=gray,
backgroundcolor=black!5,
innerleftmargin=5pt,
innerrightmargin=5pt,
innertopmargin=5pt,
leftmargin=0cm,
rightmargin=0cm,
linewidth=4pt,
innerbottommargin=5pt]{cBox}

% Creates an environment for each type of theorem and assigns it a theorem text style from the "Theorem Styles" section above and a colored box from above
\newenvironment{theorem}{\begin{tBox}\begin{theoremeT}}{\end{theoremeT}\end{tBox}}
\newenvironment{exercise}{\begin{eBox}\begin{exerciseT}}{\hfill{\color{ocre}\tiny\ensuremath{\blacksquare}}\end{exerciseT}\end{eBox}}				  
\newenvironment{definition}{\begin{dBox}\begin{definitionT}}{\end{definitionT}\end{dBox}}	
\newenvironment{example}{\begin{exampleT}}{\hfill{\tiny\ensuremath{\blacksquare}}\end{exampleT}}		
\newenvironment{corollary}{\begin{cBox}\begin{corollaryT}}{\end{corollaryT}\end{cBox}}	
\newenvironment{config}{\begin{wBox}}{\end{wBox}}

%----------------------------------------------------------------------------------------
%	REMARK ENVIRONMENT
%----------------------------------------------------------------------------------------

\newenvironment{remark}{\par\vspace{10pt}\small % Vertical white space above the remark and smaller font size
\begin{list}{}{
\leftmargin=35pt % Indentation on the left
\rightmargin=25pt}\item\ignorespaces % Indentation on the right
\makebox[-2.5pt]{\begin{tikzpicture}[overlay]
\node[draw=ocre!60,line width=1pt,circle,fill=ocre!25,font=\sffamily\bfseries,inner sep=2pt,outer sep=0pt] at (-15pt,0pt){\textcolor{ocre}{R}};\end{tikzpicture}} % Orange R in a circle
\advance\baselineskip -1pt}{\end{list}\vskip5pt} % Tighter line spacing and white space after remark

%----------------------------------------------------------------------------------------
%	SECTION NUMBERING IN THE MARGIN
%----------------------------------------------------------------------------------------

\makeatletter
\renewcommand{\@seccntformat}[1]{\llap{\textcolor{ocre}{\csname the#1\endcsname}\hspace{1em}}}                    
\renewcommand{\section}{\@startsection{section}{1}{\z@}
{-4ex \@plus -1ex \@minus -.4ex}
{1ex \@plus.2ex }
{\normalfont\large\sffamily\bfseries}}
\renewcommand{\subsection}{\@startsection {subsection}{2}{\z@}
{-3ex \@plus -0.1ex \@minus -.4ex}
{0.5ex \@plus.2ex }
{\normalfont\sffamily\bfseries}}
\renewcommand{\subsubsection}{\@startsection {subsubsection}{3}{\z@}
{-2ex \@plus -0.1ex \@minus -.2ex}
{.2ex \@plus.2ex }
{\normalfont\small\sffamily\bfseries}}                        
\renewcommand\paragraph{\@startsection{paragraph}{4}{\z@}
{-2ex \@plus-.2ex \@minus .2ex}
{.1ex}
{\normalfont\small\sffamily\bfseries}}

%----------------------------------------------------------------------------------------
%	PART HEADINGS
%----------------------------------------------------------------------------------------

\newcommand{\StelTOCdepth}{1}% reset this to 0 before appendix!

% numbered part in the table of contents
\newcommand{\@mypartnumtocformat}[2]{%
\setlength\fboxsep{0pt}%
\noindent\colorbox{ocre!20}{\strut\parbox[c][.7cm]{\ecart}{\color{ocre!70}\Large\sffamily\bfseries\centering#1}}\hskip\esp\colorbox{ocre!40}{\strut\parbox[c][.7cm]{\linewidth-\ecart-\esp}{\Large\sffamily\centering#2}}}%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% unnumbered part in the table of contents
\newcommand{\@myparttocformat}[1]{%
\setlength\fboxsep{0pt}%
\noindent\colorbox{ocre!40}{\strut\parbox[c][.7cm]{\linewidth}{\Large\sffamily\centering#1}}}%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newlength\esp
\setlength\esp{4pt}
\newlength\ecart
\setlength\ecart{1.2cm-\esp}
\newcommand{\thepartimage}{}%
\newcommand{\partimage}[1]{\renewcommand{\thepartimage}{#1}}%
\def\@part[#1]#2{%
\ifnum \c@secnumdepth >-2\relax%
\refstepcounter{part}%
\addcontentsline{toc}{part}{\texorpdfstring{\protect\@mypartnumtocformat{\thepart}{#1}}{\partname~\thepart\ ---\ #1}}
\else%
\addcontentsline{toc}{part}{\texorpdfstring{\protect\@myparttocformat{#1}}{#1}}%
\fi%
\startcontents%
\markboth{}{}%
{\thispagestyle{empty}%
\begin{tikzpicture}[remember picture,overlay]%
\node at (current page.north west){\begin{tikzpicture}[remember picture,overlay]%	
\fill[ocre!20](0cm,0cm) rectangle (\paperwidth,-\paperheight);
\node[anchor=north] at (4cm,-3.25cm){\color{ocre!40}\fontsize{220}{100}\sffamily\bfseries\@Roman\c@part}; 
\node[anchor=south east] at (\paperwidth-1cm,-\paperheight+1cm){\parbox[t][][t]{10.5cm}{% GZ: was 8.5cm, but Appendix has longer names.
\printcontents{l}{0}{\setcounter{tocdepth}{\StelTOCdepth}}% %% GZ TODO: Make tocdepth0 for Appendix, 1 before.
}};
\node[anchor=north east] at (\paperwidth-1.5cm,-3.25cm){\parbox[t][][t]{15cm}{\strut\raggedleft\color{white}\fontsize{30}{30}\sffamily\bfseries#2}};
\end{tikzpicture}};
\end{tikzpicture}}%
\@endpart}
\def\@spart#1{%
\startcontents%
\phantomsection
{\thispagestyle{empty}%
\begin{tikzpicture}[remember picture,overlay]%
\node at (current page.north west){\begin{tikzpicture}[remember picture,overlay]%	
\fill[ocre!20](0cm,0cm) rectangle (\paperwidth,-\paperheight);
\node[anchor=north east] at (\paperwidth-1.5cm,-3.25cm){\parbox[t][][t]{15cm}{\strut\raggedleft\color{white}\fontsize{30}{30}\sffamily\bfseries#1}};
\end{tikzpicture}};
\end{tikzpicture}}
\addcontentsline{toc}{part}{\texorpdfstring{%
\setlength\fboxsep{0pt}%
\noindent\protect\colorbox{ocre!40}{\strut\protect\parbox[c][.7cm]{\linewidth}{\Large\sffamily\protect\centering #1\quad\mbox{}}}}{#1}}%
\@endpart}
\def\@endpart{\vfil\newpage
\if@twoside
\if@openright
\null
\thispagestyle{empty}%
\newpage
\fi
\fi
\if@tempswa
\twocolumn
\fi}

%----------------------------------------------------------------------------------------
%	CHAPTER HEADINGS
%----------------------------------------------------------------------------------------

\newcommand{\thechapterimage}{}%
\newcommand{\chapterimage}[1]{\renewcommand{\thechapterimage}{#1}}%
\def\@makechapterhead#1{%
{\parindent \z@ \raggedright \normalfont
\ifnum \c@secnumdepth >\m@ne
\if@mainmatter
\begin{tikzpicture}[remember picture,overlay]
\node at (current page.north west)
{\begin{tikzpicture}[remember picture,overlay]
\node[anchor=north west,inner sep=0pt] at (0,0) {\includegraphics[width=\paperwidth]{\thechapterimage}};
\draw[anchor=west] (\Gm@lmargin,-9cm) node [line width=2pt,rounded corners=15pt,draw=ocre,fill=white,fill opacity=0.5,inner sep=15pt]{\strut\makebox[22cm]{}};
\draw[anchor=west] (\Gm@lmargin+.3cm,-9cm) node {\huge\sffamily\bfseries\color{black}\thechapter. #1\strut};
\end{tikzpicture}};
\end{tikzpicture}
\else
\begin{tikzpicture}[remember picture,overlay]
\node at (current page.north west)
{\begin{tikzpicture}[remember picture,overlay]
\node[anchor=north west,inner sep=0pt] at (0,0) {\includegraphics[width=\paperwidth]{\thechapterimage}};
\draw[anchor=west] (\Gm@lmargin,-9cm) node [line width=2pt,rounded corners=15pt,draw=ocre,fill=white,fill opacity=0.5,inner sep=15pt]{\strut\makebox[22cm]{}};
\draw[anchor=west] (\Gm@lmargin+.3cm,-9cm) node {\huge\sffamily\bfseries\color{black}#1\strut};
\end{tikzpicture}};
\end{tikzpicture}
\fi\fi\par\vspace*{270\p@}}}

%-------------------------------------------

\def\@makeschapterhead#1{%
\begin{tikzpicture}[remember picture,overlay]
\node at (current page.north west)
{\begin{tikzpicture}[remember picture,overlay]
\node[anchor=north west,inner sep=0pt] at (0,0) {\includegraphics[width=\paperwidth]{\thechapterimage}};
\draw[anchor=west] (\Gm@lmargin,-9cm) node [line width=2pt,rounded corners=15pt,draw=ocre,fill=white,fill opacity=0.5,inner sep=15pt]{\strut\makebox[22cm]{}};
\draw[anchor=west] (\Gm@lmargin+.3cm,-9cm) node {\huge\sffamily\bfseries\color{black}#1\strut};
\end{tikzpicture}};
\end{tikzpicture}
\par\vspace*{270\p@}}
\makeatother

\usepackage{marvosym}% For the Zodiac symbols, \Aries etc.
\usepackage{wasysym}% For \diameter etc.
\usepackage{tocvsec2} % Allows fine-tuning TOC depth. (to suppress GPL sections in TOC but have them still numbered)
%\newenvironment{commands}{\begin{wBox}\begin{Verbatim}}{\end{Verbatim}\end{wBox}}
%\DefineVerbatimEnvironment{commands}{\begin{wBox}\begin{Verbatim}}{\end{Verbatim}\end{wBox}}
%\lstnewenvironment{commands}{\begin{wBox}\lstset{basicstyle=\ttfamily}\begin{lstlisting}}{\end{lstlisting}\end{wBox}}

%% This can be used to verify general page layout with the command \layout given later.
%% \usepackage{layout}


\ifpdf
 \usepackage[os=win]{menukeys}% For the menu, keycaps, etc. This requires the updated catoptions.sty.
 %% Keypress buttons. This is just a font change now, but can be a boxed key or such.
 % Prefer using menukeys.
 \newcommand{\key}[1]{\keys{#1}}
 \newcommand{\keyPageUp}{\keys{Page\,\arrowkeyup\,}}
 \newcommand{\keyPageDown}{\keys{Page\,\arrowkeydown\,}}
\else
 %TODO redefine \menu properly!
 \newcommand{\key}[1]{\fbox{\textbf{\textsf{\small #1}}} }
 \newcommand{\keys}[1]{\fbox{\textbf{\textsf{\small #1}}} }
 \newcommand{\keyPageUp}{\keys{Page\,$\uparrow$\,} }
 \newcommand{\keyPageDown}{\keys{Page\,$\downarrow$\,} }
 \newcommand{\arrowkeyleft}{\keys{$\leftarrow$} }
 \newcommand{\arrowkeyright}{\keys{$\rightarrow$} }
 \newcommand{\arrowkeydown}{\keys{$\downarrow$} }
 \newcommand{\arrowkeyup}{\keys{$\uparrow$} }
 \newcommand{\Space}{Space}
 \newcommand{\ctrl}{Ctrl}
 \newcommand{\cmdmac}{Command}
 \newcommand{\Alt}{Alt}
 \newcommand{\tab}{$\rightleftharpoons$}
 \newcommand{\shift}{$\Uparrow$}
 \newcommand{\return}{$\hookleftarrow$}
 \newcommand{\menu}[1]{\fbox{\textsf #1} }
\fi

\renewcommand{\topfraction}{0.9}

\definecolor{light-gray}{gray}{0.90}
%----------------------------------------------------------------------------------------
%	HYPERLINKS IN THE DOCUMENTS. These packages should be last, else some PDF bookmarks fail!
%----------------------------------------------------------------------------------------

% Redefines to create commas between footnote marks. Does not always work, though, and causes missing PDF links. TODO: Fix this! 
% https://tex.stackexchange.com/questions/554074/what-is-the-correct-way-to-have-commas-between-footnotes-and-prevent-footnote
% \let\oldFootnote\footnote
% \let\oldFootref\footref
% \newcommand\nextToken\relax
% \renewcommand\footnote[1]{%
%     \oldFootnote{#1}\futurelet\nextToken\isFootnoteOrFootref}
% \renewcommand\footref[1]{%
%     \oldFootref{#1}\futurelet\nextToken\isFootnoteOrFootref}
% \newcommand\isFootnoteOrFootref{%
%     \ifx\footnote\nextToken\textsuperscript{,}\fi%
% 	\ifx\footref\nextToken\textsuperscript{,}\fi}

%\usepackage[dont-mess-around]{fnpct}

\ifpdf
\usepackage{xurl}% will break long URLs also with pdflatex.
\usepackage{hyperref}
\hypersetup{hidelinks,%backref=true,pagebackref=true,hyperindex=true, %% 3 latter are default, produce warnings if specified again.
            colorlinks=false,breaklinks=true,urlcolor= ocre,
            pdfpagemode=UseOutlines,bookmarksopen=true,%bookmarks=true,bookmarksopenlevel=1,bookmarksnumbered,
            pdfview=Fit,pdfstartview=Fit,pdfpagelayout=TwoPageRight,
            pdfduplex=DuplexFlipLongEdge,
            pdfsubject={Stellarium is a multi-platform open-source desktop planetarium. This document describes version 0.15+ (2016)},
            %pdfcreator={PDFLaTeX},
            %pdfproducer={Stellarium team},%(should be application name!)
            pdfkeywords={Stellarium Manual},
            pdftitle={Stellarium User Guide},pdfdisplaydoctitle=true,
            pdfauthor={Georg Zotti and Alexander Wolf (editors)}%
            }
%% GZ TODO Maybe in some other style, but links should be visible.
%\hypersetup{backref=true,pagebackref=true,hyperindex=true,colorlinks=true,breaklinks=true,urlcolor=blue,bookmarks=true,bookmarksopen=false,pdftitle={Title},pdfauthor={Author}}
% Repeat some settings with pdfcatalog:
%\pdfcatalog{pdfpagemode=UseOutlines,bookmarksopen=true,%bookmarks=true,bookmarksopenlevel=1,bookmarksnumbered,
%            pdfview=Fit,pdfstartview=Fit,pdfpagelayout=TwoPageRight,}
\fi

\usepackage{bookmark}
\bookmarksetup{
open,
numbered,
addtohook={%
\ifnum\bookmarkget{level}=0 % chapter
\bookmarksetup{bold}%
\fi
\ifnum\bookmarkget{level}=-1 % part
\bookmarksetup{color=ocre,bold}%
\fi
}
}