\documentclass[aspectratio=1610]{beamer}
\hypersetup{
unicode=true,
linkcolor=blue,
anchorcolor=blue,
citecolor=green,
filecolor=black,
urlcolor=blue
}
%%%%% PACKAGES HERE
%% \usepackage{}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{listings}
\usepackage[cache=false]{minted}
\usepackage{textcomp}
\usepackage[style=authortitle,backend=biber]{biblatex}
\addbibresource{references.bib}
\input{smile_styles}
%% Start from here.
\title{SMILE example beamer\footfullcite{nasy_beamer_2022}}
\author{author}
\date\today
\begin{document}
\begin{frame}[plain]
\titlepage
// Title page \footcite{nasy_beamer_2022}
\end{frame}
\begin{frame}{Outline}
\tableofcontents
// This frame is the outline page which contains the full outline.
\end{frame}
\section{Introduction}
\begin{frame}
\tableofcontents[currentsection, subsectionstyle=show/show/hide]
// This frame is the outline page for frame Introduction
\end{frame}
\subsection {Subsec 1}
\begin{frame}
\frametitle{Frame Title 1}
Example Example
\end{frame}
\subsection {Subsec 2}
\begin{frame}{Frame Title 2}
Example Example
\begin{itemize}
\item item 1
\item item 2
\end{itemize}
\end{frame}
\section {Sec 2}
\begin{frame}
\tableofcontents[currentsection, subsectionstyle=show/show/hide]
\end{frame}
\subsection {Subsec 3}
\begin{frame}
\frametitle{Frame Title 3}
xxx
\end{frame}
\end{document}