optimize entropy

main.tex

@@ -34,6 +34,26 @@
   giveninits=true
 ]{biblatex}
 
+% --- Beamer-like blocks (printer-friendly) ---
+\usepackage[most]{tcolorbox}
+\usepackage{xcolor}
+
+% A dedicated "Examples" block (optional convenience wrapper)
+\newtcolorbox{examples}{%
+  enhanced,
+  breakable,
+  colback=white,
+  colframe=black!90,
+  coltitle=white,            % title text color
+  colbacktitle=black!90,      % <<< grey 80 title bar
+  boxrule=0.6pt,
+  arc=1.5mm,
+  left=1.2mm,right=1.2mm,top=1.0mm,bottom=1.0mm,
+  fonttitle=\bfseries,
+  title=Examples
+}
+
+
 % In the assembled book, we load *all* chapter bib files here,
 % and print one combined bibliography at the end.
 
@@ -74,8 +94,8 @@
 \mainmatter
 
 % Each chapter is in its own file and included as a subfile.
-\subfile{preface}
-\subfile{chapters/chap0}
+% \subfile{preface}
+% \subfile{chapters/chap0}
 \subfile{chapters/chap1}
 \subfile{chapters/chap2}
 \subfile{chapters/chap3}