\mode<presentation>

\defbeamertemplate*{title page}{sigsum}[1][]{
	\begin{tikzpicture}[remember picture, overlay]
		\usebeamercolor{titlepage}
		%
		% Draw top-most rectangle with logo
		%
		\filldraw[draw=none,fill=sigsumOrange]
		($ (current page.east) + (1,0) $) --
		($ (current page.north east) + (1,1) $) --
		($ (current page.north west) + (-1,1) $) --
		($ (current page.west) + (-1,0) $) --
		($ (current page.east) + (1,0) $);
		\node[draw=none] (Logo) at ($ (current page.center) !.5! (current page.north) $) {
			\includegraphics[width=.6\textwidth]{img/logo}
		};

		%
		% Add title
		%
		\node[text=fg, text width=0.75\paperwidth] (Title) at ([shift={(0,-0.5cm)}]current page){
			\centering\usebeamerfont{title}\inserttitle\\
		};

		%
		% Add date
		%
		\node[text=fg, text width=0.75\paperwidth, below=0pt of Title] (Subtitle){
			\centering\usebeamerfont{date}\today\\%
		};

		%
		% Add authors
		%
		\usebeamercolor{author}
		\node[text=fg, text width=0.75\paperwidth, below=0pt of Subtitle] (Author){
			\centering\usebeamerfont{author}\insertauthor\\%
		};
	\end{tikzpicture}
}

\mode<all>