%==============================================================================
% Beamer style for posters
% // based on 'cpbgposter' beamer theme //
%==============================================================================


\ProvidesPackage{beamerthemePoster}

\RequirePackage[dvipsnames]{xcolor}
\RequirePackage{tikz}
\usetikzlibrary{arrows,decorations.pathmorphing,backgrounds,calc}
% \RequirePackage{lmodern}
% \RequirePackage{textcomp}
\RequirePackage{amsmath,amssymb,amsthm}
% \usefonttheme{professionalfonts}

\usepackage{ragged2e}

% normal math font
%\usepackage{mathptmx}
% funny math font
% \usepackage{euler}
\usepackage[defaultsans]{lato}
\usepackage{lete-sans-math}
% \RequirePackage[fira]{fontsetup}
% \RequirePackage{FiraMono}
% \setmathfont{Fira Math}[range=\setminus]

%%% other text fonts
%\usepackage{palatino}
%\usepackage{bookman}
%\usepackage{utopia}
%\usepackage{tgpagella}
%\usepackage{tgheros}
%
%\renewcommand\rmdefault{qtm}
%\renewcommand\sfdefault{qhv}
%\renewcommand\ttdefault{qcr}
\renewcommand\ttdefault{lmvtt}

% multicols
\usepackage{multicol}
\setlength{\columnsep}{80pt}

% captions
\usepackage[justification=justified,listformat=simple,format=plain,labelformat=simple]{caption}

\usepackage{url}

%==============================================================================
% define basic colors 
%==============================================================================
%==============================================================================

  \definecolor{color0}  {RGB}{0,0,0} %%% text color
  \definecolor{color1}  {rgb}{0.33, 0.42, 0.18}  %%% title and subsection color
  \definecolor{color2}  {RGB}{12 72 66}  %%% section color
  \definecolor{color3}  {RGB}{255,255,255} %%% background color

%==============================================================================
%==============================================================================

%set the basic colors palette
%   \setbeamercolor{palette primary}   {fg=color0,bg=color3}
%   \setbeamercolor{palette secondary} {fg=color0,bg=color3}
%   \setbeamercolor{palette tertiary}  {fg=color0,bg=color3}
%   \setbeamercolor{palette quaternary}{fg=color0,bg=color3}
  \setbeamercolor{structure}{fg=color1}
%   \setbeamercolor{titlelike}         {bg=color1,fg=color3}
%   \setbeamercolor{frametitle}        {bg=color2!10,fg=color2}
%
  \setbeamercolor{colorbar}{fg=color0,bg=color1}
  \setbeamercolor{normal text}{fg=color0}

% background color
  \beamertemplatesolidbackgroundcolor{color3}
  %\beamertemplateshadingbackground{color3}{color3!70!color1}

%set the fonts
  \setbeamerfont{section in head/foot}{series=\bfseries}
  \setbeamerfont{block title}{series=\bfseries}
  \setbeamerfont{block alerted title}{series=\bfseries}
  \setbeamerfont{frametitle}{series=\bfseries}
  \setbeamerfont{frametitle}{size=\Large}
  \setbeamerfont{caption}{size=\normalsize}
  \setbeamerfont{caption name}{size=\normalsize}

%set some beamer theme options
  \setbeamertemplate{title page}[default][colsep=-4bp,rounded=true]
  \setbeamertemplate{sections/subsections in toc}[square]
  \setbeamertemplate{items}[default]
  \setbeamertemplate{blocks}[width=0.0]
  \beamertemplatenavigationsymbolsempty
%set bibliography style
%  \setbeamertemplate{bibliography item}[author]
%  \setbeamercolor{bibliography item}{fg=color0,bg=color3}
%  \setbeamercolor{bibliography entry author}{fg=color0,bg=color3}
%  \setbeamerfont{bibliography item}{size=\small}
%  \setbeamerfont{bibliography entry author}{size=\small}
% theorem env
\setbeamertemplate{theorem begin}{%
{
  \vspace{5pt}%
  \usebeamerfont*{block title}%
  \selectfont%
  \usebeamercolor[fg]{block title}%
  \textbf{%
  \inserttheoremname
  % \inserttheoremnumber
  \ifx \inserttheoremaddition \empty \else\ \inserttheoremaddition\fi
  }
}
}
\setbeamertemplate{theorem end}{\vspace{5pt}}
% proof env
\setbeamertemplate{proof begin}{%
{\vspace{5pt}
\usebeamercolor[fg]{block title}
\textit{\textbf{Proof:}}}
}
\setbeamertemplate{proof end}{
\qedhere
\vspace{5pt}
}

%
%==============================================================================
% build the poster title
%==============================================================================
\setbeamertemplate{headline}{
 \leavevmode
  % \begin{columns}

  %  \begin{column}{\linewidth}
    \vskip2cm
    \centering
    %\usebeamercolor{title in headline}
{\color{color2} \textbf{\huge{\inserttitle}}\\[1ex]}
    \vskip 1.5cm
    %\usebeamercolor{author in headline}
{\color{fg} \Large{\insertauthor}\\[1ex]}
    %\usebeamercolor{institute in headline}
{\color{fg} \large{\insertinstitute}\\[1ex]}
        \vskip2cm
      % \end{column}
      %  \begin{column}{.2\linewidth}
      %    \begin{center}
      %      \includegraphics[width=0.55\linewidth]{image/uestc.png}
      %    \end{center}
      %  \end{column}
      %   \vspace{1cm}
    % \end{columns}

%%% additional bar under titles
%\begin{beamercolorbox}[colsep=0.5cm]{colorbar}
%\end{beamercolorbox}
}


%==============================================================================
% build the poster foot
%==============================================================================
\setbeamertemplate{footline}{
 \leavevmode
    \vskip2cm
  \begin{center}
\begin{minipage}[c][3cm][c]{0.95\textwidth}
  \begin{center}
%
%      \begin{flushleft}
%      \vskip-1cm
%      \begin{tikzpicture}[
% remember picture,overlay,
% %background rectangle/.style={fill=color3},show background rectangle
% ]
%        \shade [inner color=color2,outer color=color3] (0,0) rectangle (\textwidth,0.3cm);
%      \end{tikzpicture}
%      \end{flushleft}
%
  \vskip1cm
    \centering
    %\usebeamercolor{title in headline}
{\color{fg} \textbf{\large{\insertshorttitle}}}
%
  \end{center}
\end{minipage}
  \end{center}
    \vskip0.8cm
}

%
%==============================================================================
% Section and subsection re-definitions

\renewcommand{\section}[1]{
\par\vskip\medskipamount%
%
     \begin{flushleft}
     \begin{tikzpicture}[remember picture,overlay]
       \shade [inner color=color2,outer color=color3] (0,0) rectangle (\columnwidth,0.3cm);
     \end{tikzpicture}
     \end{flushleft}
    % \vspace{5pt}
%
     \begin{center}
     %\vskip1cm
     {\textcolor{color2}{\textbf{\Large #1}}}
     {\parskip0pt\par}
     \end{center}
%
     \begin{flushleft}
     \vskip-1cm
     \begin{tikzpicture}[remember picture,overlay]
       \shade [inner color=color2,outer color=color3] (0,0) rectangle (\columnwidth,0.3cm);
     \end{tikzpicture}
     \end{flushleft}
    % \vspace{2.5pt}
%
  {\parskip0pt\par}
  \justifying
}

%%%
\renewcommand{\subsection}[1]{
\par\vskip\medskipamount%
     \begin{center}
     \vskip0.8cm
     {\textcolor{color1}{\textbf{\textsl{\large #1}}}}
     {\parskip0pt\par}
     \end{center}
%
  \justifying
}

%==============================================================================