Let us start

.gitignore

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+## Core latex/pdflatex auxiliary files:
+*.aux
+*.lof
+*.log
+*.lot
+*.fls
+*.out
+*.toc
+*.fmt
+*.fot
+*.cb
+*.cb2
+.*.lb
+
+## Intermediate documents:
+*.dvi
+*.xdv
+*-converted-to.*
+# these rules might exclude image files for figures etc.
+# *.ps
+# *.eps
+*.pdf
+
+## Generated if empty string is given at "Please type another file name for output:"
+.pdf
+
+## Bibliography auxiliary files (bibtex/biblatex/biber):
+*.bbl
+*.bcf
+*.blg
+*-blx.aux
+*-blx.bib
+*.run.xml
+
+## Build tool auxiliary files:
+*.fdb_latexmk
+*.synctex
+*.synctex(busy)
+*.synctex.gz
+*.synctex.gz(busy)
+*.pdfsync
+
+## Auxiliary and intermediate files from other packages:
+# algorithms
+*.alg
+*.loa
+
+# achemso
+acs-*.bib
+
+# amsthm
+*.thm
+
+# beamer
+*.nav
+*.pre
+*.snm
+*.vrb
+
+# changes
+*.soc
+
+# cprotect
+*.cpt
+
+# elsarticle (documentclass of Elsevier journals)
+*.spl
+
+# endnotes
+*.ent
+
+# fixme
+*.lox
+
+# feynmf/feynmp
+*.mf
+*.mp
+*.t[1-9]
+*.t[1-9][0-9]
+*.tfm
+
+#(r)(e)ledmac/(r)(e)ledpar
+*.end
+*.?end
+*.[1-9]
+*.[1-9][0-9]
+*.[1-9][0-9][0-9]
+*.[1-9]R
+*.[1-9][0-9]R
+*.[1-9][0-9][0-9]R
+*.eledsec[1-9]
+*.eledsec[1-9]R
+*.eledsec[1-9][0-9]
+*.eledsec[1-9][0-9]R
+*.eledsec[1-9][0-9][0-9]
+*.eledsec[1-9][0-9][0-9]R
+
+# glossaries
+*.acn
+*.acr
+*.glg
+*.glo
+*.gls
+*.glsdefs
+
+# gnuplottex
+*-gnuplottex-*
+
+# gregoriotex
+*.gaux
+*.gtex
+
+# htlatex
+*.4ct
+*.4tc
+*.idv
+*.lg
+*.trc
+*.xref
+
+# hyperref
+*.brf
+
+# knitr
+*-concordance.tex
+# TODO Comment the next line if you want to keep your tikz graphics files
+*.tikz
+*-tikzDictionary
+
+# listings
+*.lol
+
+# makeidx
+*.idx
+*.ilg
+*.ind
+*.ist
+
+# minitoc
+*.maf
+*.mlf
+*.mlt
+*.mtc[0-9]*
+*.slf[0-9]*
+*.slt[0-9]*
+*.stc[0-9]*
+
+# minted
+_minted*
+*.pyg
+
+# morewrites
+*.mw
+
+# nomencl
+*.nlg
+*.nlo
+*.nls
+
+# pax
+*.pax
+
+# pdfpcnotes
+*.pdfpc
+
+# sagetex
+*.sagetex.sage
+*.sagetex.py
+*.sagetex.scmd
+
+# scrwfile
+*.wrt
+
+# sympy
+*.sout
+*.sympy
+sympy-plots-for-*.tex/
+
+# pdfcomment
+*.upa
+*.upb
+
+# pythontex
+*.pytxcode
+pythontex-files-*/
+
+# thmtools
+*.loe
+
+# TikZ & PGF
+*.dpth
+*.md5
+*.auxlock
+
+# todonotes
+*.tdo
+
+# easy-todo
+*.lod
+
+# xmpincl
+*.xmpi
+
+# xindy
+*.xdy
+
+# xypic precompiled matrices
+*.xyc
+
+# endfloat
+*.ttt
+*.fff
+
+# Latexian
+TSWLatexianTemp*
+
+## Editors:
+# WinEdt
+*.bak
+*.sav
+
+# Texpad
+.texpadtmp
+
+# Kile
+*.backup
+
+# KBibTeX
+*~[0-9]*
+
+# auto folder when using emacs and auctex
+./auto/*
+*.el
+
+# expex forward references with \gathertags
+*-tags.tex
+
+# standalone packages
+*.sta
+
+# generated if using elsarticle.cls
+*.spl

corvinusmetropolis.cls

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+\NeedsTeXFormat{LaTeX2e}
+\ProvidesClass{corvinusmetropolis}[2021/10/26 corvinusmetropolis v0.1]
+\DeclareOption*{\PassOptionsToClass{\CurrentOption}{beamer}}
+\ProcessOptions
+\LoadClass{beamer}
+%
+\ifpdf
+    \ClassInfo{corvinusmetropolis}{Use all of beamer options.\MessageBreak
+    LaTeX package corvinusmetropolis is loaded}
+\else
+    \ClassError{corvinusmetropolis}{Optimal usage: lualatex <filename>\MessageBreak
+                     pdflatex also works but does not use Corvinus fonts}
+\fi
+%
+\newcommand{\@email}{}
+\newcommand{\email}[1]{\renewcommand{\@email}{#1}}
+\newcommand{\putemail}{\url{\@email}}
+%
+\synctex=1
+%
+\RequirePackage{graphicx,iftex}
+\ifboolexpr{bool {xetex} or bool {luatex}}{
+    \RequirePackage{fontspec}%The package fontspec is also loaded by metropolis.sty but I do not need the option no-math.
+}{\ClassInfo{corvinusmetropolis}{The recommended tex compiler is lualatex or xelatex.}}
+%
+\usetheme[outer/progressbar=foot, titleformat=smallcaps, subsectionpage=progressbar, block=fill]{metropolis}
+\ifboolexpr{bool {xetex} or bool {luatex}}%
+    {%
+    \iffontsavailable{TT Nooks-Regular, Calluna-It, Calluna-Regular}
+        {%
+        \setsansfont[BoldFont={TT Nooks-Regular},ItalicFont={Calluna-It}]{Calluna-Regular}%
+        \ClassInfo{corvinusmetropolis}{Corvinus recommended fonts TT Nooks and Calluna work properly!}%
+        }
+        {\ClassInfo{corvinusmetropolis}{At least one of Corvinus recommended fonts is missing. \MessageBreak
+            Install the fonts TT Nooks and Calluna!}}
+    }%
+    {
+        \ClassInfo{corvinusmetropolis}{You need to compile XeLaTeX os LuaLatex to use the Corvinus recommended fonts TT Nooks and Calluna}
+    }
+%
+\definecolor{CorvinusGold}{HTML}{855C24}
+\definecolor{CorvinusBlue}{HTML}{1B213E}
+\setbeamercolor{normal text}{fg=CorvinusBlue}
+\setbeamercolor{alerted text}{fg=CorvinusGold, bg=CorvinusBlue}
+%
+\setbeamertemplate{blocks}[rounded]
+%
+\newcommand{\thankyoupage}[1]{
+    \frametitle{#1}
+    \includegraphics[width=.5\textwidth]{corvinus_egyszerusitett_logo_cmyk.eps}
+    \hfill{\putemail}
+}
+\newcommand{\closingframes}[1]{
+    \metroset{outer/numbering=none}
+    \frame{\thankyoupage{#1}}
+    \frame{}
+}
+\newcommand{\openingframes}[1]{
+    \metroset{outer/numbering=none, outer/progressbar=foot}
+    \frame{\titlepage}
+    \frame{\frametitle{#1}
+    \tableofcontents}
+    \metroset{outer/numbering=counter, outer/progressbar=foot, block=transparent}%
+}
+\endinput
+Last Modified: Tue 26 Oct 2021 03:55:30 pm CEST CEST CEST 
+Created: Tue 26 Oct 2021 08:10:34 am CEST
+