new headre emphasis

examples/businesscard-qrcode.cls

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+% Local forwarder for compiling examples from this repository checkout.
+% Ensures examples use ../businesscard-qrcode.cls instead of a globally installed class.
+\input{../businesscard-qrcode.cls}
+\endinput

examples/centered-backside-example.tex

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+\documentclass[textwidth=0.58,qrwidth=0.35,qrfirst]{businesscard-qrcode}
+
+\type{work}
+\givennames{John}
+\familynames{Doe}
+\title{CEO}
+\company{My\ Company\ LTD}
+\email{john.doe@mycompany.ltd}
+\homepage{mycompany.ltd}
+\phone{+41\ 44\ 123\ 45\ 67}
+\street{Example\ Street\ 1}
+\zip{8000}
+\city{Z\"urich}
+\country{Switzerland}
+
+\begin{document}
+  % Front side: standard layout with QR
+  \drawcard
+
+  % Back side: centered text-only layout
+  \newcard
+  \centercontent{%
+    {\Large\bfseries My\ Company\ LTD}\par
+    \vspace{0.8em}
+    john.doe@mycompany.ltd\par
+    mycompany.ltd
+  }
+  \drawcard[layout=centered,noqr,noheader]
+\end{document}