fix: ensure email addresses are strictly lowercase

lib/pdf-business-card.tsx

@@ -314,7 +314,7 @@ const styles = StyleSheet.create({
   roleText: {
     fontSize: 6.5,
     fontWeight: 'bold',
-    color: COLORS.primary,
+    color: COLORS.darkGreen,
     letterSpacing: 1.2,
     textTransform: 'uppercase',
   },
@@ -815,8 +815,7 @@ export const PDFBusinessCard: React.FC<PDFBusinessCardProps> = ({
   };
 
   const getBackLogoPaths = () => {
-    if (variant === 'black') return logoBlackWithTaglinePaths;
-    return logoBlueWithTaglinePaths;
+    return logoBlackWithTaglinePaths;
   };
 
   const bgImagePath = isWhiteVariant
@@ -954,7 +953,7 @@ export const PDFBusinessCard: React.FC<PDFBusinessCardProps> = ({
                   <View style={styles.iconWrapper}>
                     <EmailIcon />
                   </View>
-                  <Text style={styles.contactText}>{person.email}</Text>
+                  <Text style={styles.contactText}>{person.email.toLowerCase()}</Text>
                 </View>
                 <View style={styles.contactRow}>
                   <View style={styles.iconWrapper}>

scripts/generate-business-cards.ts

@@ -34,7 +34,7 @@ const PEOPLE: PersonData[] = [
     name: 'Klaus Mintel',
     role: 'Managing Director',
     phone: '+49 151 1775 2873',
-    email: 'Klaus.mintel@klz-cables.com',
+    email: 'klaus.mintel@klz-cables.com',
   },
   {
     name: 'Johannes Gleich',