% Modified Beamer Style sheet for NGNI publications
% Last edited by: Lieuwe B. Leene 2017 August
% Modified by Lieuwe Leene, June 2019

\mode<presentation>

\newif\ifbeamer@secheader
\beamer@secheaderfalse
\DeclareOptionBeamer{secheader}{\beamer@secheadertrue}
\ProcessOptionsBeamer
\useoutertheme{ngni}

% color definitions
\definecolor{ngniblue}{RGB}{34,57,106}
\definecolor{ngnired}{RGB}{218,30,37}
\definecolor{ngniwhite}{RGB}{240,240,255}
\definecolor{ngniblack}{RGB}{0,0,30}

% footer styling
\setbeamerfont{footnote}{size=\scriptsize}
\setbeamercolor{footnote}{fg=white,bg=ngniblue}

% set the title color
\setbeamercolor{title}{fg=ngniwhite}
\setbeamerfont{title}{size=\LARGE}
\setbeamercolor{author}{fg=ngniwhite}
\setbeamerfont{author}{size=\normalsize}
\setbeamercolor{institute}{fg=ngniwhite}
\setbeamerfont{institute}{size=\normalsize}

% set colors for specific elements
\setbeamercolor{block}{fg=ngniblack}
\setbeamercolor{block title}{fg=ngniblack} % adjust title color to poppy
\setbeamercolor{block item}{fg=ngniblack}
\setbeamercolor{itemize item}{fg=ngniblack} % adjusts the bullet color

% frame title styling
\setbeamertemplate{frametitle}{\vspace{1.5em} \color{ngniblack} \insertframetitle} 
\setbeamerfont{frametitle}{size=\LARGE,series=\bfseries}

% frame content styling
\setbeamersize{text margin left=1.5em,text margin right=3em}

%define first bullet symbol
\usesubitemizeitemtemplate{%
    \tiny\raise1.5pt\hbox{\color{beamerstructure}$\circ$}%
}

%define second bullet symbol
\usesubsubitemizeitemtemplate{%
    \tiny\raise1.5pt\hbox{\color{beamerstructure}$\blacktriangleright$}%
}

\ifbeamer@secheader\else\setbeamertemplate{headline}[default]\fi

\mode
<all>