ITMOtemplate.sty

\mode<presentation>
%%%%% Fourier math
\usepackage[T1]{fontenc}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Packages
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[raster,most]{tcolorbox}
\usepackage{adjustbox}
\usepackage{ifxetex}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Define the colors of the corporate style.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\definecolor{ITMOblue}{RGB}{25,70,186}
\definecolor{ITMOred}{RGB}{236,11,67}
\definecolor{ITMOwhite}{RGB}{255,255,255}
\definecolor{ITMOPeach}{RGB}{255,132,0}
\definecolor{ITMOSkyBlue}{RGB}{61,181,230}
\definecolor{ITMOMint}{RGB}{0,174,157}
\definecolor{ITMOSeaWave}{RGB}{94, 192, 213}
\definecolor{ITMOMango}{RGB}{255,230,13}
\definecolor{ITMOLemon}{RGB}{235,231,14}
\definecolor{ITMOCoral}{RGB}{234,65,38}
\definecolor{ITMOEmerald}{RGB}{0,148,77}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Fonts
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifxetex
    \usepackage{fontspec}
    \setsansfont[
        % Path = {fonts/}
        Path            = fonts/,
        BoldFont        = helveticaneue-medium.ttf,
        ItalicFont      = helveticaneue-thin.ttf,
        BoldItalicFont  = helveticaneue-light.ttf
    ]{helveticaneue.ttf}
\else
    \usepackage[scaled]{helvet}
    \renewcommand\familydefault{\sfdefault}
    \usepackage[letterspace=50]{microtype}
\fi

\usefonttheme[onlymath]{serif}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Headline
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \setbeamertemplate{headline}{\vskip-.1px}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Footline
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{footline}{
   \begin{beamercolorbox}[ht=3ex,dp=2ex,leftskip=1.4cm,rightskip=.3cm]{section in head/foot}
        \insertsectionnavigationhorizontal{.8\textwidth}{}{}
        \hfill
        \insertframenumber~/ \inserttotalframenumber
        \hspace{2pt}
   \end{beamercolorbox}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Title page
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamercolor{title}{fg=ITMOwhite}

% Changing foot/head lines for titlepage
\makeatletter
\def\ps@lines@titlepage{%
    %%%% FOOTLINE
    \setbeamertemplate{footline}{
        \setlength\lineskip{3pt}
        {
            \fontsize{4pt}{6pt}\selectfont\centering\usebeamercolor[fg]{title}
            \textbf{\textit{\insertdate}}
            \par
        }
        \vspace{.5cm}
    }
    %%%% HEADLINE
    \setbeamertemplate{headline}{
        \vspace{.5cm}
        {\centering\includegraphics[height = 1.5cm]{figs/itmo_logo_blue_en.eps}\par}
    }
    %%%% BACKGROUND
    \setbeamertemplate{background}{
        \includegraphics[width=\paperwidth,height=\paperheight,keepaspectratio]{figs/itmo_polygons.pdf}
    }
}

\makeatother
\setbeamertemplate{title page}
{
    \thispagestyle{lines@titlepage}
    \usebeamercolor[fg]{title}

    \vfill

    \centering{
        \begin{varwidth}{0.9\textwidth}
            \bf\Large\inserttitle
        \end{varwidth}
    }

    \bigskip

    \centering{\footnotesize\insertauthor}

    \bigskip

    {
        \fontsize{5pt}{6pt}\selectfont
        {\textit{\insertinstitute}}
    }
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Frame
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{sidebar right}{}
\setbeamertemplate{navigation symbols}{}
\setbeamercolor{section in head/foot}{bg=ITMOblue, fg=ITMOwhite}
\setbeamerfont{frametitle}{series=\bfseries}
\setbeamerfont{frame}{size=\footnotesize}

%%% See the beamercolorbox documentation in http://tug.ctan.org/macros/latex/contrib/beamer/doc/beameruserguide.pdf
%%% The page 126
\setbeamertemplate{frametitle}{
\nointerlineskip
    \begin{beamercolorbox}[wd=\paperwidth,dp=7pt,ht=18pt,leftskip=10pt,rightskip=10pt]{section in head/foot}
        \insertframetitle
        \hfill
        \raisebox{-1pt}{\includegraphics[height=12pt]{figs/itmo_logo_horiz_blue_en.eps}}
    \end{beamercolorbox}
}

\logo{\includegraphics[height=1.5cm]{figs/itmo_logo_blue_en.eps}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Beamer Features
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Overlays
\setbeamercovered{transparent}
%%%%% Alert
\setbeamercolor{alerted text}{fg=ITMOred,bg=white}
\newcommand{\boxalert}[1]{{%
    \colorbox{ITMOred}{\color{white}{#1}}%
}}
\usestructuretemplate{\color{ITMOblue}}{}
%%%%% Table of Contents
\setbeamertemplate{section in toc}[sections numbered]
\setbeamertemplate{subsection in toc}[subsections numbered]

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Fancylist environment
%%%%% https://tex.stackexchange.com/questions/385663/custom-enumerate-list-align-enumerate-label-at-the-center-of-text
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcounter{fancycount}
% lets define some options using pgfkeys
% https://tex.stackexchange.com/questions/34312/how-to-create-a-command-with-key-values
\pgfkeys{
    /fancylist/.is family,
    /fancylist,
    default/.style = {shape = circle, color = ITMOblue},
    shape/.estore in = \myshape,
    color/.estore in = \mycolor,
}

\newenvironment{fancylist}[1][color=ITMOPeach, shape=circle] {%
    \pgfkeys{/fancylist, default, #1}%

    % lets decide label shape based on option
    \def\mysquare{square}
    \def\myring{ring}
    \def\myhollowsquare{hollowsquare}
    \ifx\myshape\mysquare
        \def\mydraw{
            \node[
                draw = \mycolor, rectangle, minimum width = 7.0mm,
                minimum height=7.0mm, inner sep = 0pt, fill = \mycolor
            ] at (X) { \color{white}\refstepcounter{fancycount}\Large\arabic{fancycount} }
        }
    \else
        \ifx\myshape\myhollowsquare
            \def\mydraw{
                \node[
                    draw = \mycolor, rectangle, minimum width = 7.0mm, minimum height = 7.0mm, inner sep = 0pt
                ] at (X) { \color{white}\refstepcounter{fancycount}\Large\arabic{fancycount} }
            }
        \else
            \ifx\myshape\myring
                \def\mydraw{
                    \node[
                        draw = \mycolor, circle, minimum width = 7.0mm, inner sep = 0pt
                    ] at (X) {\color{white}\refstepcounter{fancycount}\Large\arabic{fancycount}}
                }
            \else
                \def\mydraw{
                    \node[
                        draw = \mycolor, circle, minimum width = 7.0mm, inner sep = 0pt, fill=\mycolor
                    ] at (X) {\color{white}\refstepcounter{fancycount}\Large\arabic{fancycount}}
                }
            \fi
        \fi
    \fi

    \setcounter{fancycount}{0}
    % lets keep it simple and ask users to use \item
    \def\item{\tcbitem}
    \begin{tcbitemize} [
        raster columns=1,
        nofloat,
        enhanced,
        raster left skip=10.0mm,
        sharp corners=all,
        opacityfill=0,
        valign=center,
        coltext=black,
        overlay={
            \coordinate (X) at ([xshift=-7.50mm]frame.west); \mydraw;
            \draw[very thick, color=\mycolor] (frame.north west) -- (frame.south west);
        }
    ]
} {\end{tcbitemize}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Fancybox
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newsavebox\mybox
\providecommand\fancybox[3][ITMOblue] {%

    \tcbset{
        mybox/.style={
            enhanced,
            grow to left by=-2.5cm,
            boxsep=0mm,
            sharp corners=all,
            opacityfill=0,
            coltext=black,
            overlay={
                \coordinate (X) at ([xshift=-1mm, yshift=-1.5mm]frame.north west);
                \node[align=right, text=#1, text width=2.5cm, anchor=north east] at (X) {#2};
                \draw[line width=0.5mm, color=#1] (frame.north west) -- (frame.south west);
            }
        }
    }

    \begin{tcolorbox}[mybox]
        efdf: #3
    \end{tcolorbox}

}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Theorem
\newcounter{theo} \setcounter{theo}{0}
\renewcommand{\thetheo}{\arabic{theo}}
\resetcounteronoverlays{theo}

\renewenvironment<>{theorem}[1][]{%
    \refstepcounter{theo}
    \tcbset{
        mybox/.style={
            enhanced,
            grow to left by=-2cm,
            boxsep=0mm,
            sharp corners=all,
            opacityfill=0,
            coltext=black,
            overlay={
                \coordinate (X) at ([xshift=-1mm, yshift=-1.5mm]frame.north west);
                \node[align=right, text=ITMOblue, text width=2.5cm, anchor=north east] at (X) {Theorem~\thetheo};
                \draw[line width=0.5mm, color=ITMOblue] (frame.north west) -- (frame.south west);
            }
        }
    }

    \def\tmp{#1}%
    \ifx\tmp\@nnil
        \begin{actionenv}#2\begin{tcolorbox}[mybox]
        \textit{#1}\par
    \else
        \begin{actionenv}#2\begin{tcolorbox}[mybox]
}{
    \end{tcolorbox}\end{actionenv}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Proof
\renewenvironment<>{proof}{%
    \tcbset{
      mybox/.style={
        enhanced,
        grow to left by=-2cm,
        boxsep=0mm,
        sharp corners=all,
        opacityfill=0,
        coltext=black,
        overlay={
          \coordinate (X) at ([xshift=-1mm, yshift=-1.5mm]frame.north west);
          \node[align=right, text=ITMOEmerald, text width=2.5cm, anchor=north east] at (X) {Proof.};
          \draw[line width=0.5mm, color=ITMOEmerald] (frame.north west) -- (frame.south west);
          }
        }
      }
    \begin{actionenv}#1
    \begin{tcolorbox}[mybox]
}{
    \hfill\qedsymbol
    \end{tcolorbox}
    \end{actionenv}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Example
\newcounter{exmpl} \setcounter{exmpl}{0}
\renewcommand{\theexmpl}{\arabic{exmpl}}
\resetcounteronoverlays{exmpl}

\renewenvironment<>{example}[1][]{%
    \refstepcounter{exmpl}
    \tcbset{
        mybox/.style={
            enhanced,
            grow to left by=-2cm,
            boxsep=0mm,
            sharp corners=all,
            opacityfill=0,
            coltext=black,
            overlay={
                \coordinate (X) at ([xshift=-1mm, yshift=-1.5mm]frame.north west);
                \node[align=right, text=ITMOPeach, text width=2.5cm, anchor=north east] at (X) {Example~\theexmpl};
                \draw[line width=0.5mm, color=ITMOPeach] (frame.north west) -- (frame.south west);
            }
        }
    }
    \def\tmp{#1}%
    \ifx\tmp\@nnil
        \begin{actionenv}#2\begin{tcolorbox}[mybox]
        \textit{#1}\par
    \else
        \begin{actionenv}#2\begin{tcolorbox}[mybox]
}{
    \end{tcolorbox}
    \end{actionenv}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Alertblock
\renewenvironment<>{alertblock}[1]{%
    \tcbset{
        mybox/.style={
            enhanced,
            grow to left by=-2cm,
            boxsep=0mm,
            sharp corners=all,
            opacityfill=0,
            coltext=black,
            overlay={
                \coordinate (X) at ([xshift=-1mm, yshift=-1.5mm]frame.north west);
                \node[align=right, text=ITMOred, text width=2.5cm, anchor=north east] at (X) {#1};
                \draw[line width=0.5mm, color=ITMOred] (frame.north west) -- (frame.south west);
            }
        }
    }

    \begin{actionenv}#2
    \begin{tcolorbox}[mybox]
}{
    \end{tcolorbox}
    \end{actionenv}
}