diff --git a/compendium.pdf b/compendium.pdf
index 4cd512e..131eac8 100644
Binary files a/compendium.pdf and b/compendium.pdf differ
diff --git a/compendium.tex b/compendium.tex
index 640ed7f..a280fe5 100644
--- a/compendium.tex
+++ b/compendium.tex
@@ -4,12 +4,33 @@
 
 \usepackage{pmboxdraw} % provides angled lines for tab:phylolevels
 
-\definecolor{explainboxframe}{RGB}{170, 255,125}
+\definecolor{explainboxframe}{RGB}{140, 185, 163}
+\definecolor{explainboxbg}{RGB}{170, 255,125}
 \usepackage[framemethod=default]{mdframed}
 \mdfsetup{skipabove = \topskip, skipbelow = \topskip}
-\mdfdefinestyle{explainbox}{%
-	linecolor=explainboxframe, linewidth = 2pt, rightmargin = 0cm, leftmargin = 0cm,
-	li
+
+% modified after:
+% https://ctan.ebinger.cc/tex-archive/macros/latex/contrib/mdframed/mdframed-example-default.pdf
+\newenvironment{explainbox}[1][]{%
+	\ifstrempty{#1}%
+	{\mdfsetup{%
+			frametitle={%
+				\tikz[baseline = (current bounding box.east), outer sep = 0pt]
+				\node[anchor=east, rectangle, fill = explainboxframe!90]
+				{\strut "Title Empty"};}}%
+	}%
+	{\mdfsetup{%
+			frametitle={%
+				\tikz[baseline = (current bounding box.east), outer sep = 0pt]
+				\node[anchor=east, rectangle, fill = explainboxframe!90]
+				{\strut #1};}}%
+	}%
+	\mdfsetup{innertopmargin = 10pt, linecolor = explainboxframe!90,%
+		linewidth = 2pt, topline = true,
+		frametitleaboveskip = \dimexpr-\ht\strutbox}
+	\begin{mdframed}[]\relax%
+	}{
+	\end{mdframed}
 }
 
 %opening
@@ -30,11 +51,11 @@
 % ### PREFACE ###
 %\pagenumbering{none}
 \section*{Einleitung}
-dsadsadsa
-\begin{mdframed}[style=explainbox]
-	content...
-\end{mdframed}
 
+dassda
+\begin{explainbox}[Zoogamie]
+	bliblablub
+\end{explainbox}
 
 
 % ### TOC ###