Přeložení dokumentu se nezdařilo. (pdflatex error 12)

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This is pdfTeX, Version 3.141592653-2.6-1.40.27 (TeX Live 2026/dev/Arch Linux) (preloaded format=pdflatex 2025.4.14)  26 APR 2025 10:16
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**01DIFRcviceni_Header_3c0c3d32.tex
(./01DIFRcviceni_Header_3c0c3d32.tex
LaTeX2e <2024-11-01> patch level 2
L3 programming layer <2025-01-18>
(./header.tex (/usr/share/texmf-dist/tex/latex/base/article.cls
Document Class: article 2024/06/29 v1.4n Standard LaTeX document class
(/usr/share/texmf-dist/tex/latex/base/size12.clo
File: size12.clo 2024/06/29 v1.4n Standard LaTeX file (size option)
)
\c@part=\count196
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Package: inputenc 2024/02/08 v1.3d Input encoding file
\inpenc@prehook=\toks17
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) (/usr/share/texmf-dist/tex/generic/babel/babel.sty
Package: babel 2025/02/14 v25.4 The multilingual framework for pdfLaTeX, LuaLaT
eX and XeLaTeX
\babel@savecnt=\count270
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(/usr/share/texmf-dist/tex/generic/babel/txtbabel.def)
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(/usr/share/texmf-dist/tex/generic/babel-czech/czech.ldf
Language: czech 2008/07/06 v3.1a Czech support from the babel system
Package babel Info: Making " an active character on input line 172.
\cs@wordlen=\count272
Package babel Info: Making - an active character on input line 226.
)) (/usr/share/texmf-dist/tex/generic/babel/locale/cs/babel-czech.tex
Package babel Info: Importing font and identification data for czech
(babel)             from babel-cs.ini. Reported on input line 11.
)) (/usr/share/texmf-dist/tex/latex/l3backend/l3backend-pdftex.def
File: l3backend-pdftex.def 2024-05-08 L3 backend support: PDF output (pdfTeX)
\l__color_backend_stack_int=\count273
\l__pdf_internal_box=\box52
) (./01DIFRcviceni_Header_3c0c3d32.aux)
\openout1 = `01DIFRcviceni_Header_3c0c3d32.aux'.

LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for TS1/cmr/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.

! LaTeX Error: Can be used only in preamble.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.4 \documentclass
                  [12pt]{article}
Your command was ignored.
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.


! LaTeX Error: Can be used only in preamble.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.5 \usepackage
               [utf8]{inputenc}
Your command was ignored.
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.


! LaTeX Error: Can be used only in preamble.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.6 \usepackage
               [czech]{babel}
Your command was ignored.
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.



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LaTeX2e <2024-11-01> patch level 2
L3 programming layer <2025-01-18>
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Output written on 01DIFRcviceni_Header_3c0c3d32.pdf (1 page, 11975 bytes).
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