% Unofficial NeurIPS 2026 talk theme for beamer, 16:9.
% From the Quantitative Research Society's attendee guide, qrsntu.org/service/neurips26/oral/.
% Not an official NeurIPS theme. Licence: MIT.
%
% Follows the NeurIPS 2026 Main Track Handbook's talk advice: little text, large fonts, bold for emphasis, no
% text effects, dark text on a cream background, and colours that do not carry meaning on their own.
% NeurIPS projectors are 16:9 with HDMI input (neurips.cc/FAQ/AudioVisualProjectorConnection).
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{beamerthemeneurips26}[2026/11/05 Unofficial NeurIPS 2026 talk theme]
\RequirePackage{qrcode}

% Colours: change these four to restyle the deck. Keep dark text on a light background.
\definecolor{npink}{HTML}{14242B}    % text and headings
\definecolor{nppaper}{HTML}{FBF9F4}  % background
\definecolor{npaccent}{HTML}{E0A100} % rules and highlights, never the only signal
\definecolor{npsoft}{HTML}{F1ECDF}   % boxes and placeholders
\definecolor{npmuted}{HTML}{4A565C}  % captions and footers

% Paper details, used on the title slide, the footer and the closing slide.
\def\np@paperurl{}\def\np@paperid{}\def\np@session{}\def\np@contact{}
\newcommand*{\paperurl}[1]{\def\np@paperurl{#1}}
\newcommand*{\paperid}[1]{\def\np@paperid{#1}}
\newcommand*{\session}[1]{\def\np@session{#1}}
\newcommand*{\contact}[1]{\def\np@contact{#1}}

\usefonttheme{professionalfonts}
\setbeamertemplate{navigation symbols}{}
\setbeamercolor{background canvas}{bg=nppaper}
\setbeamercolor{normal text}{fg=npink,bg=nppaper}
\setbeamercolor{structure}{fg=npink}
\setbeamercolor{alerted text}{fg=npink}
\setbeamerfont{alerted text}{series=\bfseries}
\setbeamercolor{frametitle}{fg=npink}
\setbeamerfont{frametitle}{size=\Large,series=\bfseries}
\setbeamercolor{title}{fg=npink}
\setbeamerfont{title}{size=\LARGE,series=\bfseries}
\setbeamercolor{block title}{fg=npink,bg=npsoft}
\setbeamercolor{block body}{fg=npink,bg=npsoft}
\setbeamerfont{block title}{series=\bfseries}
\setbeamertemplate{blocks}[default]
\setbeamertemplate{itemize items}{\color{npaccent}\rule[.2ex]{.55em}{.55em}}
\setbeamertemplate{enumerate items}{\textbf{\insertenumlabel.}}
\setbeamercolor{footline}{fg=npmuted}
\setbeamerfont{footline}{size=\scriptsize}

\setbeamertemplate{frametitle}{%
  \vskip1.1em
  {\usebeamerfont{frametitle}\usebeamercolor[fg]{frametitle}\insertframetitle}\par
  \vskip.35em{\color{npaccent}\rule{2.4em}{3pt}}\par\vskip-.3em}

\setbeamertemplate{footline}{%
  \leavevmode\usebeamerfont{footline}\usebeamercolor[fg]{footline}%
  \hbox to\paperwidth{\hskip1.2em\insertshorttitle\ifx\np@paperid\@empty\else\ \textperiodcentered\ Paper \np@paperid\fi
    \hfill\insertframenumber\,/\,\inserttotalframenumber\hskip1.2em}\vskip.8em}

% Title slide: SlidesLive matches the recording to the paper from the opening slide, so keep the title, the
% authors and either the paper ID or the QR code on it.
\setbeamertemplate{title page}{%
  \vbox{}\vfill
  \begin{minipage}[c]{.7\textwidth}
    {\usebeamerfont{title}\usebeamercolor[fg]{title}\inserttitle\par}
    \vskip.4em{\color{npaccent}\rule{3em}{4pt}}\par\vskip.8em
    {\large\insertauthor\par}\vskip.3em
    {\color{npmuted}\insertinstitute\par}\vskip1em
    {\small\color{npmuted}\np@session\par}
  \end{minipage}\hfill
  \begin{minipage}[c]{.24\textwidth}\centering
    \ifx\np@paperurl\@empty\else\qrcode[height=2.6cm]{\np@paperurl}\par\vskip.3em{\tiny\color{npmuted}Paper page}\fi
  \end{minipage}
  \vfill}

% \closingslide: one line to remember, the QR code again and how to reach you.
\newcommand{\closingslide}[1]{%
  \begin{frame}[plain]
    \vfill
    \begin{minipage}[c]{.68\textwidth}
      {\Large\bfseries #1\par}\vskip1em
      {\color{npmuted}\insertshorttitle\par}
      \ifx\np@contact\@empty\else\vskip.3em{\color{npmuted}\np@contact\par}\fi
      \ifx\np@session\@empty\else\vskip.3em{\small\color{npmuted}Poster: \np@session\par}\fi
    \end{minipage}\hfill
    \begin{minipage}[c]{.26\textwidth}\centering
      \ifx\np@paperurl\@empty\else\qrcode[height=3cm]{\np@paperurl}\fi
    \end{minipage}
    \vfill
  \end{frame}}

% \placeholder{height}{label}: a grey box to swap for \includegraphics[height=...]{figure}.
\newcommand{\placeholder}[2]{%
  \begin{tikzpicture}\fill[npsoft] (0,0) rectangle (\linewidth,#1);
    \node[text=npmuted] at (.5\linewidth,.5*#1) {#2};\end{tikzpicture}}

% \takeaway{text}: the one sentence the audience should leave with.
\newcommand{\takeaway}[1]{{\setlength{\fboxsep}{.6em}\noindent{\color{npaccent}\vrule width 4pt}\colorbox{npsoft}{\parbox{\dimexpr\linewidth-1.2em-4pt\relax}{\raggedright\color{npink}\bfseries #1}}}}

\RequirePackage{tikz}
\endinput