%% The LaTeX package tcolorbox - version 6.8.0 (2025/09/09)
%% tcbtheorems.code.tex: Code for theorems in colorboxes
%%
%% -------------------------------------------------------------------------------------------
%% Copyright (c) 2006-2025 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
%% -------------------------------------------------------------------------------------------
%%
%% 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.
%%
%% This work has the LPPL maintenance status `author-maintained'.
%%
%% This work consists of all files listed in README
%%
%\makeatletter
\tcb@set@library@version{6.8.0}

\RequirePackage{amsmath}


\ExplSyntaxOn

\tl_new:N \l__tcobox_theo_description_color_tl
\tl_new:N \l__tcobox_theo_description_delimiter_left_tl
\tl_new:N \l__tcobox_theo_description_delimiter_right_tl
\tl_new:N \l__tcobox_theo_description_font_tl
\tl_new:N \l__tcobox_theo_hanging_indent_tl
\tl_new:N \l__tcobox_theo_label_separator_tl
\tl_new:N \l__tcobox_theo_separatorsign_tl
\tl_new:N \l__tcobox_theo_terminatorsign_tl
\bool_new:N \l__tcobox_theo_headempty_bool


\cs_new_nopar:Npn \__tcobox_theo_format_name_number:nn #1#2
  {
    \tl_if_empty:nTF { #1 }
      {
        \tl_if_empty:nF { #2 }
          {
            \bool_set_false:N \l__tcobox_theo_headempty_bool
            #2
          }
      }
      {
        \bool_set_false:N \l__tcobox_theo_headempty_bool
        #1
        \tl_if_empty:nF { #2 }
          {
            \nobreakspace
            #2
          }
      }
  }


\cs_new_nopar:Npn \__tcobox_theo_format_number_name:nn #1#2
  {
    \__tcobox_theo_format_name_number:nn { #2 } { #1 }
  }


\cs_new_nopar:Npn \__tcobox_theo_format_name:nn #1#2
  {
    \tl_if_empty:nF { #1 }
      {
        \bool_set_false:N \l__tcobox_theo_headempty_bool
        #1
      }
  }


\cs_new_nopar:Npn \__tcobox_theo_format_number:nn #1#2
  {
    \tl_if_empty:nF { #2 }
      {
        \bool_set_false:N \l__tcobox_theo_headempty_bool
        #2
      }
  }


\cs_new:Npn \__tcobox_theo_format_description_standard:n #1
  {
    \l__tcobox_theo_description_color_tl
    \l__tcobox_theo_description_font_tl
    \l__tcobox_theo_description_delimiter_left_tl
    #1
    \l__tcobox_theo_description_delimiter_right_tl
  }



\cs_new:Npn \__tcobox_theo_title:nnn #1#2#3
  {
    % format and save display name and number
    \bool_set_true:N \l__tcobox_theo_headempty_bool
    \tl_if_empty:nTF { #3 }
      {
        % no theorem title; insert name and number
        \__tcobox_theo_format:nn{#1}{#2}
        \l__tcobox_theo_terminatorsign_tl
      }
      {
        % box display name and number
        \hbox_set:Nn \l__tcobox_tmpa_box
          {
            \__tcobox_theo_format:nn{#1}{#2}
            \bool_if:NF \l__tcobox_theo_headempty_bool
              {
                \l__tcobox_theo_separatorsign_tl
                \nobreakspace
              }
          }
        % set (hanging) indent for name and number
        \str_if_eq:VnTF \l__tcobox_theo_hanging_indent_tl { auto }
          {
            \hangindent \box_wd:N \l__tcobox_tmpa_box
            \hangafter = 1
          }
          {
            \dim_set:Nn \l__tcobox_tmpa_dim { \l__tcobox_theo_hanging_indent_tl }
            \if_dim:w \l__tcobox_tmpa_dim = \c_zero_dim
            \else:
              \if_dim:w \l__tcobox_tmpa_dim > \c_zero_dim
                \hangindent \l__tcobox_tmpa_dim
                \hangafter = 1
              \else:
                \hangindent -\l__tcobox_tmpa_dim
                \hangafter = -1
              \fi:
            \fi:
          }
        % insert box with name and number
        \mode_leave_vertical:
        \box_use_drop:N \l__tcobox_tmpa_box
        % insert formatted title
        \group_begin:
          \__tcobox_theo_format_description:n{#3}
        \group_end:
        \l__tcobox_theo_terminatorsign_tl
      }
  }


\NewDocumentCommand \__tcobox_new_tcbtheorem_x:w { m O{} m m +m m }
  {
    #1 [{auto~counter,#2}] {#3} { +O{} +o +m m }
      {
        #5,
        title      = {\__tcobox_theo_title:nnn{#4}{\thetcbcounter}{##3}},
        IfValueTF  = {##2}
          {
            list~entry = {\protect\numberline{\thetcbcounter}##2},
            nameref    = {##2},
          }
          {
            list~entry = {\protect\numberline{\thetcbcounter}##3},
            nameref    = {##3},
          },
        theo@label = {#6}{##4},
        ##1
      }
    #1 [{#2,no~counter,list~inside=}] {#3*} { +O{} +m }
      {
        #5,
        title = {\__tcobox_theo_title:nnn{#4}{}{##2}},
        ##1
      }
  }


\NewDocumentCommand \NewTcbTheorem {}
  {
    \__tcobox_new_tcbtheorem_x:w \NewTColorBox
  }
\NewCommandCopy\newtcbtheorem\NewTcbTheorem


\NewDocumentCommand \RenewTcbTheorem {}
  {
    \__tcobox_new_tcbtheorem_x:w \RenewTColorBox
  }
\NewCommandCopy\renewtcbtheorem\RenewTcbTheorem


\NewDocumentCommand \DeclareTcbTheorem {}
  {
    \__tcobox_new_tcbtheorem_x:w \DeclareTColorBox
  }


\NewDocumentCommand \ProvideTcbTheorem {}
  {
    \__tcobox_new_tcbtheorem_x:w \ProvideTColorBox
  }


\tcbset
  {
    theo@label/.code~n~args = {2}
      {
        \tl_if_empty:nF { #2 }
          {
            \tcbset
              {
                label                    = {#1\l__tcobox_theo_label_separator_tl#2},
                tcb@theo@full@label@supp = {#1\l__tcobox_theo_label_separator_tl#2},
                tcb@theo@label@supp      = {#2}
              }
          }
      },
    theorem/.style~n~args = {4}
      {
        step~and~label={#2}{#4},
        title={\__tcobox_theo_title:nnn{#1}{\cs:w the#2\cs_end:}{#3}}
      },
    theorem~name~and~number/.code =
      {
        \cs_set_eq:NN \__tcobox_theo_format:nn \__tcobox_theo_format_name_number:nn
      },
    theorem~number~and~name/.code =
      {
        \cs_set_eq:NN \__tcobox_theo_format:nn \__tcobox_theo_format_number_name:nn
      },
    theorem~name/.code =
      {
        \cs_set_eq:NN \__tcobox_theo_format:nn \__tcobox_theo_format_name:nn
      },
    theorem~number/.code =
      {
        \cs_set_eq:NN \__tcobox_theo_format:nn \__tcobox_theo_format_number:nn
      },
    separator~sign/         .tl_set:N = \l__tcobox_theo_separatorsign_tl,
    terminator~sign/        .tl_set:N = \l__tcobox_theo_terminatorsign_tl,
    label~separator/        .tl_set:N = \l__tcobox_theo_label_separator_tl,
    theorem~hanging~indent/ .tl_set:N = \l__tcobox_theo_hanging_indent_tl,
    theorem~hanging~indent/.default=auto,
    description~delimiters/.code~n~args = {2}
      {
        \tl_set:Nn \l__tcobox_theo_description_delimiter_left_tl  { #1 }
        \tl_set:Nn \l__tcobox_theo_description_delimiter_right_tl { #2 }
      },
    description~color/.code =
      {
        \tl_if_empty:nTF { #1 }
          {
            \tl_clear:N \l__tcobox_theo_description_color_tl
          }
          {
            \tl_set:Nn \l__tcobox_theo_description_color_tl { \color{#1} }
          }
      },
    description~color/.default=,
    description~font/.tl_set:N = \l__tcobox_theo_description_font_tl,
    description~font/.default  =,
    description~formatter/.code =
      {
        \__tcobox_store_formatter_in:nN {#1} \__tcobox_theo_format_description:n
      },
    description~formatter/.default = \__tcobox_theo_format_description_standard:n,
  }


\cs_if_exist:NF \__tcobox_store_formatter_in:nN
  {
    \cs_new_protected:Npn \__tcobox_store_formatter_in:nN #1#2
      {
        \__tcobox_if_single_cs:nTF {#1}
          { \cs_set_eq:NN #2 #1 }
          {
            \tcb@error
              {
                Invalid~formatter~ "\tl_to_str:n {#1}" ~passed~to \MessageBreak
                "\pgfkeyscurrentkey". \MessageBreak
                A~formatter~should~be~a~single~command~taking~one \MessageBreak
                mandatory~argument
              }
          }
      }
  }


\ExplSyntaxOff


\newtcbox{\tcboxmath}[1][]{nobeforeafter,math upper,tcbox raise base,#1}
\newtcbox{\tcbhighmath}[1][]{highlight math,nobeforeafter,math upper,tcbox raise base,#1}


\def\tcb@hack@amsmath{\tcb@hack@currenvir\vskip-\abovedisplayskip}

\if@fleqn%
\tcbset{%
  ams equation upper/.style={before upper*=\tcb@hack@amsmath\equation,after upper*=\endequation},%
  ams equation lower/.style={before lower*=\tcb@hack@amsmath\equation,after lower*=\endequation},%
  ams equation* upper/.style={before upper*=\tcb@hack@amsmath\csname equation*\endcsname,after upper*=\endequation},%
  ams equation* lower/.style={before lower*=\tcb@hack@amsmath\csname equation*\endcsname,after lower*=\endequation}%
}%
\else%
\tcbset{%
  ams equation upper/.style={before upper*=\tcb@hack@currenvir\equation,after upper*=\endequation},%
  ams equation lower/.style={before lower*=\tcb@hack@currenvir\equation,after lower*=\endequation},%
  ams equation* upper/.style={before upper*=\tcb@hack@currenvir\csname equation*\endcsname,after upper*=\endequation},%
  ams equation* lower/.style={before lower*=\tcb@hack@currenvir\csname equation*\endcsname,after lower*=\endequation},%
}%
\fi

\tcbset{
  math upper/.style={before upper*=$\displaystyle,after upper*=$},%
  math lower/.style={before lower*=$\displaystyle,after lower*=$},%
  math/.style={math upper,math lower},%
  ams equation/.style={ams equation upper,ams equation lower},%
  ams equation*/.style={ams equation* upper,ams equation* lower},%
  ams align upper/.style={before upper*=\tcb@hack@amsmath\align,after upper*=\endalign},%
  ams align lower/.style={before lower*=\tcb@hack@amsmath\align,after lower*=\endalign},%
  ams align/.style={ams align upper},%
  ams align* upper/.style={before upper*=\tcb@hack@amsmath\csname align*\endcsname,after upper*=\endalign},%
  ams align* lower/.style={before lower*=\tcb@hack@amsmath\csname align*\endcsname,after lower*=\endalign},%
  ams align*/.style={ams align* upper},%
  ams gather upper/.style={before upper*=\tcb@hack@amsmath\gather,after upper*=\endgather},%
  ams gather lower/.style={before lower*=\tcb@hack@amsmath\gather,after lower*=\endgather},%
  ams gather/.style={ams gather upper},%
  ams gather* upper/.style={before upper*=\tcb@hack@amsmath\csname gather*\endcsname,after upper*=\endgather},%
  ams gather* lower/.style={before lower*=\tcb@hack@amsmath\csname gather*\endcsname,after lower*=\endgather},%
  ams gather*/.style={ams gather* upper},%
  ams nodisplayskip upper/.style={before upper=\vskip-\abovedisplayskip},%
  ams nodisplayskip lower/.style={before lower=\vskip-\abovedisplayskip},%
  ams nodisplayskip/.style={ams nodisplayskip upper,ams nodisplayskip lower},%
  highlight math style/.style={highlight math/.style={notitle,nophantom,#1}},%
  separator sign colon/.style={separator sign={:}},%
  separator sign dash/.style={separator sign={\nobreakspace --}},%
  separator sign none/.style={separator sign=},%
  terminator sign colon/.style={terminator sign={:}},%
  terminator sign dash/.style={terminator sign={\nobreakspace --}},%
  terminator sign none/.style={terminator sign=},%
  description delimiters parenthesis/.style={description delimiters=()},
  description delimiters none/.style={description delimiters={}{}},
  theorem style/.is choice,
  theorem style/standard/.style={separator sign colon,description delimiters none,
    terminator sign none,theorem name and number,attach title},
  theorem style/change standard/.style={theorem style=standard,theorem number and name},
  theorem style/plain/.style={separator sign none,description delimiters parenthesis,
    terminator sign colon,theorem name and number,attach title to upper={\ }},
  theorem style/plain apart/.style={separator sign none,description delimiters parenthesis,
    terminator sign none,theorem name and number,attach title},
  theorem style/break/.style={theorem style=plain,attach title to upper={\par}},
  theorem style/change/.style={theorem style=plain,theorem number and name},
  theorem style/change apart/.style={theorem style=plain apart,theorem number and name},
  theorem style/change break/.style={theorem style=break,theorem number and name},
  theorem style/margin/.style={theorem style=plain,theorem name,before title=\makebox[0pt][r]{\thetcbcounter\ }},
  theorem style/margin apart/.style={theorem style=margin,attach title,terminator sign none},
  theorem style/margin break/.style={theorem style=margin,attach title to upper={\par}},
  theorem label supplement/.style={tcb@theo@label@supp/.style={#1}},
  theorem full label supplement/.style={tcb@theo@full@label@supp/.style={#1}},
}


\tcbset{%
  reset@theorems/.style={%
    description formatter,description color,description font,
    highlight math style={colframe=red,colback=yellow!25!white},%
    theorem style=standard,label separator=:,%
    theorem label supplement=,theorem full label supplement=,%
    theorem hanging indent%
  },
  initialize@reset=reset@theorems,
}

