Custom tweaks for https://github.com/elauksap/focus-beamertheme

focus-theme-tweak.tex

\cslet{beamer@@tmpop@title page@focus}\relax
\setbeamerfont{author}{size=\LARGE, shape=\scshape}
\setbeamerfont{institute}{size=\footnotesize, shape=\scshape}
\defbeamertemplate*{title page}{focus}{%
    
    \vspace{-1.\baselineskip}
    \begin{minipage}[b][0.275\paperheight]{\textwidth}
        \vspace{\baselineskip}
        \usebeamerfont{title}
        \usebeamercolor[main]{frametitle}
        \inserttitle
    \end{minipage}
    
%     \vspace{1.\baselineskip}
%     \begin{minipage}[t][0.15\paperheight]{\textwidth}
%         \usebeamerfont{subtitle}
%         \usebeamercolor[fg]{frametitle}
%         \insertsubtitle
%     \end{minipage}
%
    % Set the title graphic in a zero-height box, so that
    % the position of other elements is not affected.
    {\vfuzz=9999pt\vbox to 0pt {
        \raggedleft
        \inserttitlegraphic
    }}

     \vspace*{0pt plus 100fill}
   
     \def\beamer@andtitle{\\[0.4em]}
    \quad\begin{minipage}[t]{0.55\textwidth}
        \usebeamerfont{author}
        \insertauthor
    \end{minipage}
    
    \vspace*{\baselineskip}
     \def\beamer@andinst{\\[0.25em]}
    \begin{minipage}[t]{0.55\textwidth}
        \usebeamerfont{institute}
        \insertinstitute
    \end{minipage}
    
    \vspace*{0pt plus 100fill}
    
    \begin{minipage}[t]{\textwidth}
        \usebeamerfont{date}
        \centering
        \insertdate
    \end{minipage}
   	
    \vspace*{0pt plus 100fill}
    
    \addtocounter{framenumber}{-1}
}
\let \beamer@@tmpop@footline@fullbar \relax
\defbeamertemplate*{footline}{fullbar}{%
    % If not appendix.
    \ifnum\mainend<0% From package appendixnumberbeamer.
        %
        \settowidth{\focus@pbar@leftoffset}{1}%
        \addtolength{\focus@pbar@leftoffset}{1.5em}%
        %
        \settowidth{\focus@pbar@rightoffset}{\inserttotalframenumber}%
        \addtolength{\focus@pbar@rightoffset}{1.5em}%
        %
        % If not title page.
        \ifnum\c@framenumber>0%
            \begin{tikzpicture}[
              inner xsep=0.5em, inner ysep=0.5ex,
              lighter/.style = {
                fill = main!10!bg,
                rounded corners = 2pt,
                font = \tiny
              },
              darker/.style = {
                fill = main!20!bg,
                rounded corners = 2pt,
                font = \tiny
              }
              ]
                \clip (0,0) rectangle ++(\paperwidth,\the\focus@pbar@height);
                \node [darker, anchor=west] (author) at (0,0.4*\focus@pbar@height) {\strut\insertshortauthor};
              \node [lighter, anchor=west] (date) at (author.east) {\strut\insertshortdate};
              \node [darker, anchor=west] (title) at (date.east) {\strut\insertshorttitle};
                
                \node[anchor=east, footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut\insertframenumber};
                \node[footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut/};
                \node[anchor=west, footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut\inserttotalframenumber};
            \end{tikzpicture}%
        \fi%
    \fi%
}