% Copyright (C) 2023 by Maxime CHUPIN
% <chupin at ceremade.dauphine.fr>
% -------------------------------------------------------
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
%  Author: Maxime CHUPIN
%          chupin at ceremade.dauphine.fr
%
%  This work has the LPPL maintenance status "author-maintained".

\NeedsTeXFormat{LaTeX2e}[2021-11-15]
\ProvidesPackage{beamerthemeAmurmaple}[2023/01/30 v.1.2 Theme for the Beamer
class]%


% some colors
\definecolor{AmurmapleRed}{rgb}{0.6,0.,0.}
\definecolor{AmurmapleOrange}{RGB}{230,108,17}
\definecolor{AmurmapleBlue}{RGB}{55,119,231}
\definecolor{AmurmapleGreen}{rgb}{0.1,0.4,0.1}
\definecolor{AmurmapleRemarkColor}{rgb}{0.2,0.2,0.2}

\colorlet{Amurmaple@structure}{AmurmapleRed}
\colorlet{Amurmaple@alert}{AmurmapleOrange}
\colorlet{Amurmaple@info}{AmurmapleBlue}
\colorlet{Amurmaple@example}{AmurmapleGreen}
\colorlet{Amurmaple@rule}{black}

\def\amurmaple@sidebarwidth{58pt}

\newif\ifbeamer@am@nogauge
\beamer@am@nogaugetrue
\DeclareOptionBeamer{nogauge}{\beamer@am@nogaugefalse}
\newif\ifbeamer@am@nomail
\beamer@am@nomailtrue
\DeclareOptionBeamer{nomail}{\beamer@am@nomailfalse}
\newif\ifbeamer@am@delaunay
\beamer@am@delaunayfalse
\DeclareOptionBeamer{delaunay}{\beamer@am@delaunaytrue}
\newif\ifbeamer@am@amurmapleblue
\beamer@am@amurmaplebluefalse
\DeclareOptionBeamer{amurmapleblue}{\beamer@am@amurmaplebluetrue}
\newif\ifbeamer@am@amurmaplegreen
\beamer@am@amurmaplegreenfalse
\DeclareOptionBeamer{amurmaplegreen}{\beamer@am@amurmaplegreentrue}
\newif\ifbeamer@am@sidebar
\beamer@am@sidebarfalse
\DeclareOptionBeamer{sidebarwidth}{\def\amurmaple@sidebarwidth{#1}}
\DeclareOptionBeamer{sidebar}{\beamer@am@sidebartrue}
\newif\ifbeamer@am@toplogo
\beamer@am@toplogofalse
\DeclareOptionBeamer{toplogo}{\beamer@am@toplogotrue}
\newif\ifbeamer@am@leftframetitle
\beamer@am@leftframetitlefalse
\DeclareOptionBeamer{leftframetitle}{\beamer@am@leftframetitletrue}
\newif\ifbeamer@am@rule
\beamer@am@rulefalse
\DeclareOptionBeamer{rule}{\beamer@am@ruletrue}
\DeclareOptionBeamer{rulecolor}{\colorlet{Amurmaple@rule}{#1}}
\ProcessOptionsBeamer

\RequirePackage{tcolorbox}
\RequirePackage{multicol}
\RequirePackage{xparse}
\RequirePackage{xfp}
\RequirePackage{expl3}
\RequirePackage{iftex}
\RequirePackage{pgfpages}



\ifbeamer@am@delaunay
\ifLuaTeX
\else
\errmessage{Delaunay option only available with luaLaTeX}
\fi
\fi

%sidebar
\ifbeamer@am@sidebar
  \useoutertheme[height=0pt,width=\amurmaple@sidebarwidth,hideothersubsections]{sidebar}
  \setbeamertemplate{sidebar left}{%
    \ifbeamer@am@toplogo
      \hskip -0.03cm%
      \hbox to \beamer@sidebarwidth{
        \hfil \hbox{\insertlogo} \hfil
      }
    \fi
    \beamer@tempdim=\beamer@sidebarwidth%
    %\advance\beamer@tempdim by -6pt%
    {\usebeamerfont{title in sidebar}%
      \vskip1.5em%
      \hskip3pt%
      \usebeamercolor[fg]{title in sidebar}%
      \insertshorttitle[width=\beamer@tempdim,center,respectlinebreaks]\par%
      \vskip1.em%
    }%
    {%
      \hskip3pt%
      \usebeamercolor[fg]{author in sidebar}%
      \usebeamerfont{author in sidebar}%
      \insertshortauthor[width=\beamer@tempdim,center,respectlinebreaks]\par%
      \vskip1.25em%
    }%
    \insertverticalnavigation{\beamer@sidebarwidth}%
    \vfill
    \ifx\beamer@sidebarside\beamer@lefttext%
    \else%
      \usebeamercolor{normal text}%
      \llap{\usebeamertemplate***{navigation symbols}\hskip0.1cm}%
      \vskip2pt%
    \fi%
  }%
  % Margins
  \setbeamersize{text margin left=0.5cm,text margin right=0.5cm}
\fi

% dimensions
\ExplSyntaxOn
\ifbeamer@am@sidebar
  \dim_const:Nn \c_amurmaple_barre_dim  { \beamer@sidebarwidth }
\else
  \dim_const:Nn \c_amurmaple_barre_dim  { 15pt }
\fi
\dim_const:Nn \c_amurmaple_margin {15pt}
\ifbeamer@am@sidebar
  \tl_set:Nx \l_amurmaple_margin_left { \dim_eval:n {\c_amurmaple_margin } }
\else
  \tl_set:Nx \l_amurmaple_margin_left { \dim_eval:n { \c_amurmaple_barre_dim+\c_amurmaple_margin } }
\fi
\setbeamersize
{
  text~ margin~ left=\l_amurmaple_margin_left,
  text~ margin~ right=\c_amurmaple_margin
}
\ExplSyntaxOff

\ifLuaTeX
\RequirePackage{luamesh}
\fi

% randomseed
\ExplSyntaxOn
\sys_gset_rand_seed:n {\time}
\ExplSyntaxOff

% counters to set the depth of toc in \sepframe
\newcounter{amurmapletoc}
\setcounter{amurmapletoc}{1}
\newcounter{amurmaple@oldtoc}

\ExplSyntaxOn
% stores all students, separated by commas
\tl_new:N \l_amurmaple_mail_tl
\tl_new:N \l_amurmaple_webpage_tl
\tl_new:N \l_amurmaple_collab_tl

\NewDocumentCommand{\mail}{m}{
  \tl_set:Nn  \l_amurmaple_mail_tl {#1}
}

\NewDocumentCommand{\webpage}{m}{
  \tl_set:Nn  \l_amurmaple_webpage_tl {#1}
}

\NewDocumentCommand{\collaboration}{m}{
  \tl_set:Nn  \l_amurmaple_collab_tl {#1}
}


\NewDocumentCommand{\amurmaple@printmail}{}{
  \IfValueT { \l_amurmaple_mail_tl} {
    \tl_use:N \l_amurmaple_mail_tl
  }
}
\NewDocumentCommand{\amurmaple@printwebpage}{}{
  \IfValueT { \l_amurmaple_webpage_tl} {
    \tl_use:N \l_amurmaple_webpage_tl
  }
}
\ExplSyntaxOff
\mode<presentation>

\useinnertheme{rectangles}

\tcbuselibrary{skins}


\usefonttheme{professionalfonts}
\usetikzlibrary{backgrounds}
\usetikzlibrary{quotes,angles}
\usetikzlibrary{automata}
\usetikzlibrary{arrows}
\usetikzlibrary{calc}

% colors
\ifbeamer@am@amurmapleblue
\colorlet{Amurmaple@structure}{AmurmapleBlue!80!black}
\colorlet{Amurmaple@alert}{AmurmapleOrange}
\colorlet{Amurmaple@info}{AmurmapleRed}
\colorlet{Amurmaple@example}{AmurmapleGreen}
\fi
\ifbeamer@am@amurmaplegreen
\colorlet{Amurmaple@structure}{AmurmapleGreen!80!black}
\colorlet{Amurmaple@alert}{AmurmapleOrange}
\colorlet{Amurmaple@info}{AmurmapleRed}
\colorlet{Amurmaple@example}{AmurmapleBlue}
\fi

\setbeamercolor{structure}{fg=Amurmaple@structure}
\setbeamercolor{itemize item}{fg=structure!60}
\setbeamercolor{itemize subitem}{fg=structure!60}
\setbeamercolor{enumerate item}{bg=structure!60,fg=white}
\setbeamercolor{enumerate subitem}{fg=structure!60}
\setbeamercolor{block title}{fg=structure}
%\setbeamercolor{section in head/foot}{bg=Brown}
%\setbeamercolor{author in head/foot}{bg=Brown}
%\setbeamercolor{date in head/foot}{fg=Brown}
\setbeamercolor{alerted text}{fg=Amurmaple@alert,bg=Amurmaple@alert!20}
\setbeamercolor{subsection in toc}{fg=gray!70!black}
% new
\setbeamercolor{mail}{fg=structure!60}

\setbeamertemplate{subsection in toc}
{\leavevmode\leftskip=2em\rule{0.6em}{0.6em}\hskip0.5em\inserttocsubsection\par}

\newlength{\gauge@step}
\NewDocumentCommand{\amurmaple@gauge}{o}{%
  \def\amurmaple@gaugewidth{40pt}%
  \IfNoValueF{#1}{%
    \def\amurmaple@gaugewidth{#1}%
  }%
  % \def\gauge@step{\numexpr\numexpr\amurmaple@gaugewidth-2pt\relax/10\relax}%
  \setlength{\gauge@step}{(\amurmaple@gaugewidth-2pt)/10}%
  \def\pourc{\numexpr(10*\insertframenumber/\insertmainframenumber)}%
  \def\xj{\numexpr(4.95*\pourc)}%
  %\resetcolorseries[9]{PiedDePage}%
  \begin{tikzpicture}[x=0.7cm,y=0.7cm]%
    \draw[color=white] (0pt,-2pt)--(\amurmaple@gaugewidth,-2pt)--(\amurmaple@gaugewidth,4pt)--(0pt,4pt)--cycle;%
    \foreach \i in {0,...,10}{%
      \ifnum\i<\pourc%
      \fill[color=white]%PiedDePage!!+]
      (\the\gauge@step*\i+1pt,-1pt)--(\the\gauge@step+\the\gauge@step*\i+1pt,-1pt)--(\the\gauge@step+\the\gauge@step*\i+1pt,3pt)--(0+\the\gauge@step*\i+1pt,3pt)--cycle;%
      \fi%
    }%
  \end{tikzpicture}%
}

% background
\ifbeamer@am@sidebar
  \setbeamercolor{sidebar}{fg=white}
  \setbeamercolor{author in sidebar}{fg=black!20!white}
  \setbeamercolor{title in sidebar}{fg=white}
  \setbeamercolor{section in sidebar}{bg=black!30!structure,fg=white}
  \setbeamercolor{subsection in sidebar}{bg=black!30!structure,fg=white}
  \setbeamerfont{section in sidebar}{size=\fontsize{6}{6}\selectfont}
  \setbeamerfont{subsection in sidebar}{size=\fontsize{4}{6}\selectfont}
  \setbeamerfont{title in sidebar}{size=\scriptsize}
  \setbeamerfont{author in sidebar}{size=\tiny}
\fi
\ExplSyntaxOn
\setbeamertemplate{background}%
{%
  \hypersetup{linkcolor=white}%
  \begin{tikzpicture}[remember~picture,overlay]%
    \fill[Amurmaple@structure]%
    (current~page.south~west) rectangle ([xshift=\c_amurmaple_barre_dim]current~%
    page.north~west);%
    \ifbeamer@am@rule
      \fill[Amurmaple@rule]%
      ([xshift=\c_amurmaple_barre_dim]current~page.south~west) rectangle ([xshift=\c_amurmaple_barre_dim+1pt]current~%
      page.north~west);%
    \fi
    \ifbeamer@am@nomail%
    \node[anchor=south,color=black!40,rotate=90] at ($(current~page.east)$)%
      (title) {\tiny%
          \texttt{\amurmaple@printmail}%
      };%
    \fi%
    \ifbeamer@am@sidebar%
      \ifbeamer@am@nogauge%
        \ifnum\insertframenumber>\insertmainframenumber % gauge only in main part
        \else%
          %\newlength{\amurmaple@gaugesidebarwidth}
          %\setlength{\amurmaple@gaugesidebarwidth}{\beamer@sidebarwidth-15pt}
          \node[anchor=south~west,color=white,inner~sep=0pt] at ([xshift=3pt,yshift=5pt]current~page.south~west)%
          (gauge) {\amurmaple@gauge[\the\beamer@sidebarwidth-6pt]};%
        \fi%
      \fi%
      \ifx\logo\empty%
      \else%
        \ifbeamer@am@toplogo%
        \else%
          \node [anchor=south~west,inner~sep=0pt] at ($(current~page.south~west)+(0,0.5)$)%
            (logo) {\insertlogo};%
        \fi
      \fi%
    \else%
      \node[anchor=north~west,rotate=90,color=white] at (current~page.south~west)%
      (title) {\scriptsize\insertshorttitle\quad---\quad \insertshortauthor%
      };%
      \ifbeamer@am@nogauge%
        \ifnum\insertframenumber>\insertmainframenumber % gauge only in main part%
        \else%
          \node[anchor=north~east,rotate=90,color=white] at (current~page.north~west)%
          (gauge) {\amurmaple@gauge};%
        \fi%
      \fi%
    \fi%
  \end{tikzpicture}%
}%
\ExplSyntaxOff
%
%
\setbeamertemplate{navigation symbols}{}
\newcounter{amurmaple@appendixframenumber}
\newcounter{amurmaple@appendixtotalframenumber}
\newcounter{amurmaple@numberofframes}
\newcounter{amurmaple@numberofmainframes}
\addtobeamertemplate{navigation symbols}{}{%
  \hspace{1em}%
  \setcounter{amurmaple@numberofframes}{\inserttotalframenumber}
  \setcounter{amurmaple@numberofmainframes}{\insertmainframenumber}
  \setcounter{amurmaple@appendixtotalframenumber}{\numexpr\value{amurmaple@numberofframes}-\value{amurmaple@numberofmainframes}}
  \setcounter{amurmaple@appendixframenumber}{\numexpr\value{framenumber}-\value{amurmaple@numberofmainframes}}
  \ifnum\insertframenumber>\insertmainframenumber% appendix
  \footnotesize\color{black}\roman{amurmaple@appendixframenumber}/\roman{amurmaple@appendixtotalframenumber}
  \else % main part
  \footnotesize\color{black}\insertframenumber/\insertmainframenumber
  \fi
}

% TOC
\setbeamertemplate{section in toc}[square]
\setbeamercolor{section number projected}{bg=white,fg=structure}


% itemize enumerate
\setbeamertemplate{itemize item}{$\blacktriangleright$}
\setbeamertemplate{itemize subitem}{\small$\blacktriangleright$}
\setbeamertemplate{enumerate item}
{
  \hbox{%
    \usebeamerfont*{item projected}%
    \usebeamercolor[bg]{enumerate item}% original: [bg]
    \vrule width2.25ex height1.85ex depth.4ex%
    \hskip-2.25ex%
    \hbox to2.25ex{%
      \hfil%
      \usebeamercolor[fg]{enumerate item}\insertenumlabel% original: [fg]
      \hfil}%
  }%
}
\setbeamertemplate{enumerate subitem}{\alph{enumii}.}

% some fonts
\setbeamerfont{block title}{size=\bfseries}
\setbeamerfont{author}{size=\bfseries\large}
\setbeamerfont{institute}{size=\normalsize\itshape}
\setbeamerfont{title}{size=\huge\bfseries}
\setbeamerfont{date}{size=\footnotesize}
\setbeamerfont{subtitle}{size=\Large\normalfont\slshape}
% new
\setbeamerfont{mail}{size=\small\ttfamily}

% title page
\ExplSyntaxOn
% list to get the points
\tl_new:N \l_delaunaypointlist_tl
\NewDocumentCommand\amurmaple@buildpoints{}{
  \tl_clear:N \l_delaunaypointlist_tl
  \int_set:Nn \l_tmpa_int { 1 }
  \tl_put_right:Nn \l_delaunaypointlist_tl {(0,0);(16,0);(16,4.5);(0,4.5);}
  \int_do_while:nNnn { \l_tmpa_int} < {40}
  {
    \tl_put_right:Nn \l_delaunaypointlist_tl {(\fpeval{16*rand()},\fpeval{4.5*rand()});}
    \int_incr:N \l_tmpa_int
  }
  \tl_put_right:Nn \l_delaunaypointlist_tl {(\fpeval{16*rand()},\fpeval{4.5*rand()})}
}

\NewExpandableDocumentCommand\amurmaple@buildmesh{}{
\node[anchor = north~west] at
    ([xshift=-50pt,yshift=30pt]current~page.north~west){\resizebox{1.5\paperwidth}{0.8\paperheight}{\buildMeshBW[color=structure!15,colorBbox=structure!15,scale=2cm]{\l_delaunaypointlist_tl}}};
}

\setbeamertemplate{title~page}{%
  \bgroup
   \setbeamertemplate{background}%
  {}
  \setbeamertemplate{navigation~symbols}{}
  \setbeamercolor{background~canvas}{bg=white}
  \begin{tikzpicture}[remember~picture,overlay]
    \fill[white]
    ([yshift=15pt]current~page.west) rectangle (current~page.north~
    east);
    \ifbeamer@am@delaunay
    \ifLuaTeX
    \amurmaple@buildpoints
    \amurmaple@buildmesh
    \fi
    \fi
    \fill[structure]
    ([yshift=15pt]current~page.west)~rectangle~(current~page.south~
    east);
    \ifbeamer@am@rule
      \fill[Amurmaple@rule]
      ([yshift=15pt]current~page.west)~rectangle~([yshift=10pt]current~page.
      east);
    \fi
    \node[anchor=east]~
    at~([yshift=-35pt,xshift=-20pt]current~page.north~east)~(author)~
    {\parbox[t]{.6\paperwidth}{\raggedleft%
        \usebeamerfont{author}\color{structure}%
          \insertauthor
          \IfValueT { \l_amurmaple_mail_tl} {
            \par \usebeamerfont{mail}\usebeamercolor[fg]{mail} \tl_use:N \l_amurmaple_mail_tl
          }
          \IfValueT { \l_amurmaple_webpage_tl} {
            \par \usebeamerfont{mail}\usebeamercolor[fg]{mail} \expandafter\url{\tl_use:N \l_amurmaple_webpage_tl}
          }
        }};
    \node[anchor=north~east]
    at~([yshift=-60pt,xshift=-20pt]current~page.north~east)
    (institute)
    {\parbox[t]{.78\paperwidth}{\raggedleft%
        \usebeamerfont{institute}\textcolor{gray}{\insertinstitute}}};
    \node[anchor=south~east]
    at ([yshift=15pt,xshift=-20pt]current~page.east)
    (date)
    {\parbox[t]{.78\paperwidth}{\raggedleft%
        \usebeamerfont{date}\textcolor{black}{\insertdate}}};
    \node[anchor=south~west]
    at ([yshift=20pt]current~page.west)~(logo)
    {\parbox[t]{.19\paperwidth}{\raggedleft%
        \usebeamercolor[fg]{titlegraphic}\inserttitlegraphic}};
    \node[anchor=east]
    at ([yshift=-25pt,xshift=-20pt]current~
    page.east) (title)
    {\parbox[t]{\textwidth}{\raggedleft%
        \usebeamerfont{title}\color{white}%
        \inserttitle
        \ifx\insertsubtitle\@empty%
        \else\par\bigskip \usebeamerfont{subtitle}\color{white}\insertsubtitle
        \fi
      }};
    \IfValueT { \l_amurmaple_collab_tl} {
      \node[anchor=south,white,text~width=0.95\linewidth,align=center] at ([yshift=10pt]current~page.south) {\itshape\tl_use:N \l_amurmaple_collab_tl};
    }
\end{tikzpicture}
\egroup
}
\ExplSyntaxOff



  % section page
\setbeamertemplate{section page}{
  \hypersetup{linkcolor=structure}
  \begin{tikzpicture}[remember picture,overlay]
    \fill[white]
    ([yshift=15pt]current page.west) rectangle (current page.north
    east);
    \ifbeamer@am@delaunay
    \ifLuaTeX
    \amurmaple@buildpoints
    \amurmaple@buildmesh
    \fi
    \fi
    \fill[structure]
    ([yshift=15pt]current page.west) rectangle (current page.south
    east);
    \ifbeamer@am@rule
      \fill[Amurmaple@rule]
      ([yshift=15pt]current page.west) rectangle ([yshift=10pt]current page.east);
    \fi
    \node[anchor=east, font=\huge, text width=0.95\linewidth,align=right]
    at ([yshift=-50pt,xshift=-20pt]current page.north east) (section)
    { Section \insertsectionnumber: \bfseries\textcolor{structure}{\insertsection}};
  \end{tikzpicture}
}

% part page
\setbeamertemplate{part page}{
  \hypersetup{linkcolor=structure}
  \begin{tikzpicture}[remember picture,overlay]
    \fill[white]
    ([yshift=15pt]current page.west) rectangle (current page.south
    east);
    \fill[structure]
    ([yshift=15pt]current page.west) rectangle (current page.north
    east);
    \ifbeamer@am@rule
      \fill[Amurmaple@rule]
      ([yshift=15pt]current page.west) rectangle ([yshift=10pt]current page.east);
    \fi
    \node[anchor=north]
    at ([yshift=-20pt]current page.north) (section)
    {\Large\textcolor{white}{Part~\insertpartnumber}};
    \node[anchor=north, font=\huge\bfseries, text width=0.9\linewidth,align=center]
    at ([yshift=-50pt]current page.north) (part)
    {\textcolor{white}{\insertpart}};
  \end{tikzpicture}
}



% frame title
\ExplSyntaxOn
\setbeamercolor{frametitle}{fg=structure}
\setbeamerfont{frametitle}{size=\bfseries\Large}
\setbeamertemplate{frametitle}{%
  \ifbeamer@am@leftframetitle
    \usebeamerfont{frametitle}\insertframetitle%
    \vphantom{g}% To avoid fluctuations per frame
    \par%
    \vspace*{-0.3cm}%
    \hspace*{-\c_amurmaple_margin}\rule{0.5\paperwidth}{2pt}%%
    \par%
    \vspace*{-0.3cm}%
    {\ifx\insertframesubtitle\@empty%
      \else%
        \usebeamerfont{framesubtitle}\insertframesubtitle%
      \fi}%
    \par%
  \else
    \raggedleft
    \usebeamerfont{frametitle}\insertframetitle%
    \vphantom{g}% To avoid fluctuations per frame
    \par
    \raggedleft
    \vspace*{-0.3cm}
    \rule{0.5\paperwidth}{2pt}\hspace*{-1cm}%%
    \par
    \raggedleft
    \vspace*{-0.3cm}%
    {\ifx\insertframesubtitle\@empty%
      \else%
        \usebeamerfont{framesubtitle}\insertframesubtitle%
      \fi}%
    \par
  \fi
}
\ExplSyntaxOff

%%%%%%%%%%%%%%
%%% commands
%%%%%%%%%%%%%%

\newenvironment{boxalertenv}{\begin{altenv}%
      {\usebeamertemplate{alerted text begin}\usebeamercolor[fg]{alerted text}\usebeamerfont{alerted text}\colorbox{bg}}
      {\usebeamertemplate{alerted text end}}{\color{.}}{}}{\end{altenv}}

\newcommand<>{\boxalert}[1]{{%
  \begin{boxalertenv}#2{#1}\end{boxalertenv}%
}}

% new one a subtitle inside a frame
\ExplSyntaxOn
\NewDocumentCommand{\framesection}{m}{
  \medskip
  \noindent{\large\bfseries\textcolor{structure}{#1}}\par\vspace*{-0.2cm}
  \hspace*{-\c_amurmaple_margin}{\color{structure}\rule{0.4\paperwidth}{2pt}}\par\smallskip%
}
% new one  define a separation frame with a title and the TOC

%% key/value
\keys_define:nn { amurmaple/sepframe } {
  title .tl_set:N = \l_sepframetitle_tl ,
  image .tl_set:N = \l_sepframeimage_tl
}

\NewDocumentCommand{\sepframe}{o}{
  % key/value
  \IfNoValueF{#1}{
    \keys_set:nn { amurmaple/sepframe} {#1}
  }
  \begingroup
  \setcounter{amurmaple@oldtoc}{\value{tocdepth}}
  \setbeamercolor{section~in~toc}{fg=white}
  \str_if_eq:VnTF{\l_sepframetitle_tl}{}{%
    \def\amurmaple@septitle{\secname}
  }{%
    \def\amurmaple@septitle{\l_sepframetitle_tl}
  }
  \setbeamertemplate{background}{}
  \setbeamertemplate{navigation~symbols}{}
  \setbeamercolor{background~canvas}{bg=white}
  \begin{frame}[noframenumbering,plain]
    \begin{tikzpicture}[remember~picture,overlay]
      \ifbeamer@am@delaunay
      \ifLuaTeX
      \amurmaple@buildpoints
      \amurmaple@buildmesh
      \fi
      \fi
      \fill[structure]
      ([yshift=15pt]current~page.west) rectangle (current~page.south~
      east);
      \ifbeamer@am@rule
      \fill[Amurmaple@rule]
      ([yshift=15pt]current~page.west)~rectangle~([yshift=10pt]current~page.
      east);
      \fi
      \node[anchor=east,text~width = 0.75\linewidth, font=\huge\bfseries,align=right]
      at ([yshift=-50pt,xshift=-20pt]current~page.north~east) (section)
      {\textcolor{structure}{\amurmaple@septitle}};
      \node[]
      at ([yshift=-40pt]current~page.center) (toc)
      {\color{white}\begin{minipage}{0.9\paperwidth}%
          \begin{multicols}{2}\hypersetup{linkcolor=white}\setcounter{tocdepth}{\theamurmapletoc}\tableofcontents%
          \end{multicols}\end{minipage}
      };
      \str_if_eq:VnTF{\l_sepframeimage_tl}{}{%
      }{
        \node[anchor=south~west]
        at ([yshift=20pt]current~page.west) (logo)
        {\parbox[t]{.19\paperwidth}{\raggedleft%
            \usebeamercolor[fg]{titlegraphic}\l_sepframeimage_tl}};
      }
    \end{tikzpicture}
    \setcounter{tocdepth}{\value{amurmaple@oldtoc}}
  \end{frame}
  \endgroup
  \tl_clear:N \l_sepframetitle_tl
    \tl_clear:N \l_sepframeimage_tl
}

\ExplSyntaxOff


% new one  define a thanks frame with a simple message to thank
\NewDocumentCommand{\thanksframe}{o m}{
  \begingroup
  \setbeamertemplate{background}{}
  \setbeamertemplate{navigation symbols}{}
  \setbeamercolor{background canvas}{bg=white}
  \IfNoValueTF{#1}{%
    \def\amurmaple@finalgraphic{\inserttitlegraphic}
  }{%
    \def\amurmaple@finalgraphic{#1}
  }
  \begin{frame}[noframenumbering,plain]
    \begin{tikzpicture}[remember picture,overlay]
      \ifbeamer@am@delaunay
      \ifLuaTeX
      \amurmaple@buildpoints
      \amurmaple@buildmesh
      \fi
      \fi
      \fill[structure]
      ([yshift=15pt]current page.west) rectangle (current page.south
      east);
      \ifbeamer@am@rule
      \fill[Amurmaple@rule]
      ([yshift=15pt]current page.west) rectangle ([yshift=10pt]current page.east);
      \fi
      \node[anchor=east,text width = 0.95\linewidth, font=\huge\bfseries,align=right]
      at ([yshift=50pt,xshift=-20pt]current page.south east) (section)
      {\textcolor{white}{#2}};
      \node[anchor=south west]
    at ([yshift=20pt]current page.west) (logo)
    {\parbox[t]{.19\paperwidth}{\raggedleft%
        \usebeamercolor[fg]{titlegraphic}\amurmaple@finalgraphic}};
    \end{tikzpicture}
  \end{frame}
  \endgroup
}


\setbeamertemplate{button}{\tikz
  \node[
  inner xsep=4pt,
  minimum height = 2em,
  draw=structure!80,
  fill=structure!50,
  rounded corners=1pt,
    align=center]  {\footnotesize\insertbuttontext};}

\RenewDocumentEnvironment{abstract}{}{%
  \begin{tcolorbox}[boxrule=0pt,frame hidden,sharp corners,enhanced,borderline
    north={1pt}{0pt}{structure},borderline
    south={1pt}{0pt}{structure}]
    \begin{center}\bfseries
      \abstractname
    \end{center}\itshape
  }
  {%
  \end{tcolorbox}%
}%

\RenewDocumentEnvironment{quotation}{o}{%
  \begin{tcolorbox}[boxrule=0pt,frame hidden,sharp corners,enhanced,borderline west={4pt}{0pt}{structure}]\itshape
  }
  {%
    \IfNoValueTF{#1}{%
    }{
      \begin{flushright}%
        \normalfont #1%
      \end{flushright}%
    }
  \end{tcolorbox}%
  %
}

\newcommand\amurmaple@info{\raisebox{-1mm}{\tikz{\node[circle,fill=Amurmaple@info,align=center,text
      width=1em,inner sep = 0.0mm]
      {\rmfamily\itshape\bfseries\color{white} i};}}}

\NewDocumentEnvironment{information}{o}{%
  \tcbset{leftrule=1mm,rightrule=0mm,toprule=0mm, bottomrule=0mm,%
    colframe=Amurmaple@info,
    sharp corners,
    detach title,%
    before title={\amurmaple@info~},
    fonttitle = \color{black}\bfseries\sffamily,
    before upper={\tcbtitle\par\medskip}
  }
  \IfNoValueTF{#1}{%
    \begin{tcolorbox}[title=\translate{Information}]
    }{
      \begin{tcolorbox}[title=#1]
      }
    }%
    {%
    \end{tcolorbox}
  }%

  \NewDocumentEnvironment{remark}{o}{
   \tcbset{%
    arc=0pt,outer arc=0pt,colback=AmurmapleRemarkColor!10,colframe=AmurmapleRemarkColor,
    boxsep=0pt,left=10pt,right=10pt,top=8pt,bottom=10pt, bottomtitle = 3pt, toptitle=3pt,
    boxrule=0pt
  }
  \smallskip
  \begin{tcolorbox}[fonttitle=\bfseries,title={\translate{Remark} \IfNoValueF{#1}{(#1)}}]}%
  {\end{tcolorbox}\medskip
}


%%%%%%%%%%%% maths

\AtBeginEnvironment{theorem}{%
  \setbeamercolor{block body}{fg=black,bg=gray!20}
  \setbeamercolor{block title}{fg=white,bg=structure}
}

\AtBeginEnvironment{definition}{%
  \setbeamercolor{block body}{fg=black,bg=gray!10}
  \setbeamercolor{block title}{fg=Amurmaple@example,bg=Amurmaple@example!40}
}

\AtBeginEnvironment{corollary}{%
  \setbeamercolor{block body}{fg=black,bg=gray!10}
  \setbeamercolor{block title}{fg=structure,bg=structure!30}
}


\setbeamercolor{block title alerted}{use=structure,fg=white,bg=Amurmaple@alert}
\setbeamercolor{block body alerted}{parent=normal text,use=block
  title,bg=gray!10}

\setbeamercolor{block title example}{fg=Amurmaple@example}
\mode
<all>