beamerouterthemematerial.sty

\mode<presentation>

% Frame title
\defbeamertemplate*{frametitle}{material}[1][]
{
  \makebox[\linewidth][c]{%
  \begin{minipage}[t]{\paperwidth}
    \raggedright
    \begin{tcolorbox}[colback=primary, enhanced, sharpish corners=all, boxrule=0mm, coltext=textPrimary, %
                      left=6mm, right=6mm, top=2.6mm, bottom=2mm,%
                      fuzzy shadow={0mm}{-0.9mm}{0mm}{0.2mm}{shadow!40!BGgrey03}, % bottomSmall
                      fuzzy shadow={0mm}{-0.8mm}{0mm}{0.2mm}{shadow!20!BGgrey03}, % bottomBig
                      fuzzy shadow={0mm}{ 0.6mm}{0mm}{0.2mm}{shadow!40!primary}, % topSmall
                      fuzzy shadow={0mm}{ 0.5mm}{0mm}{0.2mm}{shadow!20!primary}, % topBig
                      width=\paperwidth, boxsep=2mm]
   \ifx\insertframesubtitle\@empty%
        {\usebeamerfont{frametitle} \insertframetitle}
      \else%
        {\usebeamerfont{frametitle} \insertframetitle}
        {\usebeamerfont{framesubtitle} \insertframesubtitle}
      \fi
    \end{tcolorbox}
  \end{minipage}%
  }%
}


\mode<all>