(fix): preamble.tex

Author: HexWolfCoder

.gitignore

@@ -239,6 +239,7 @@ missfont.log
 
 # PDF
 *.pdf
+*.xdv
 
 # PlantUML generated
 plantuml/*.png
@@ -248,6 +249,7 @@ plantuml/*.tex
 # Editor
 *.swp
 *~
+.gitignore~
 
 # Java
 *.part

.gitignore~

@@ -219,33 +219,36 @@ __marimo__/
 # Streamlit
 .streamlit/secrets.toml
 
-#LaTeX
-
-# LaTeX вспомогательные файлы
+# LaTeX artifacts
 *.aux
 *.log
-*.out
 *.toc
+*.out
 *.lof
 *.lot
-*.fls
-*.fdb_latexmk
 *.synctex.gz
-*.synctex
+*.pytxcode
+*.fdb_latexmk
+*.fls
 *.bbl
 *.blg
 *.bcf
 *.run.xml
+*.synctex
+missfont.log
 
-# Скомпилированный PDF (опционально)
-# *.pdf
-
-# Редакторы
-.vscode/
-.idea/
-*.swp
+# PDF
+*.pdf
+*.xdv
 
 # PlantUML generated
 plantuml/*.png
 plantuml/*.tex
 !plantuml/*.puml
+
+# Editor
+*.swp
+*~
+
+# Java
+*.part

main.pdf

@@ -1,9 +1,20 @@
 % --- Шрифты (XeLaTeX) ---
+\usepackage{iftex}
 \usepackage{fontspec}
-\setmainfont{Times New Roman}
-\setsansfont{Times New Roman}
-\setmonofont{Courier New}       % или Courier New / DejaVu Sans Mono
 
+\ifxetex
+  \IfFontExistsTF{Times New Roman}{
+    \setmainfont{Times New Roman}
+    \setsansfont{Times New Roman}
+    \setmonofont{Courier New}
+  }{
+    \setmainfont{Liberation Serif}
+    \setsansfont{Liberation Sans}
+    \setmonofont{Liberation Mono}
+  }
+\else
+  \PackageError{preamble}{This document requires XeLaTeX}{}
+\fi
 % --- Графика и TikZ ---
 \usepackage{graphicx}
 \usepackage{tikz}