\usepackage{fontspec}
\usepackage{multicol}
\usepackage{listings}
\usetheme{Berkeley}

\usecolortheme{seahorse}
\setmainfont{DejaVu Sans}
\setmonofont{DejaVu Sans Mono}

\def\hititle{Mieux produire des documents}
\def\lotitle{concepts et outils}
\def\bititle{\hititle, \lotitle}

\title[\hititle]{\hititle}
\subtitle{\lotitle}
\author[M. Beninca]{Marc Beninca}
\institute[CNAM]{Conservatoire National des Arts et Métiers}
\date[Blanc 2020]{Oral probatoire blanc, 12 Mai 2020}
\logo{\includegraphics[height=7.6em]{../cnam.png}}