diff --git a/index.php b/index.php
index fcbc9dc..85a8008 100644
--- a/index.php
+++ b/index.php
@@ -344,7 +344,7 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
     $replyEmail = trim((string)($config['reply_to'] ?: $config['from_email']));
     $replyHref = 'mailto:' . $replyEmail;
     $summaryText = $count === 1
-        ? 'In diesem Zeitraum wurde 1 neuer Wiki-Artikel veröffentlicht.'
+        ? 'In diesem Zeitraum wurde ein neuer Wiki-Artikel veröffentlicht.'
         : 'In diesem Zeitraum wurden ' . $count . ' neue Wiki-Artikel veröffentlicht.';
 
     [$periodStart, $periodEnd] = newsletterPeriod((string)$config['period_mode']);
@@ -358,10 +358,10 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
     if ($count === 0) {
         $articleRows = '
           <tr>
-            <td style="padding:0 26px 18px 26px;" class="mobile-padding">
-              <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;border:1px solid #d9dfe7;background:#ffffff;">
+            <td style="padding:0 32px 22px 32px;" class="mobile-padding">
+              <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;border:1px solid #d7dee8;background:#ffffff;border-radius:14px;">
                 <tr>
-                  <td style="padding:18px;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:22px;color:#2b3340;">
+                  <td style="padding:22px;font-family:Arial,Helvetica,sans-serif;font-size:15px;line-height:23px;color:#2e3b4d;">
                     Für diesen Zeitraum wurden keine neuen Artikel gefunden.
                   </td>
                 </tr>
@@ -372,29 +372,29 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
         foreach ($articles as $article) {
             $articleRows .= '
           <tr>
-            <td style="padding:0 26px 16px 26px;" class="mobile-padding">
-              <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;background:#ffffff;border:1px solid #e2e7ee;border-left:4px solid #ef7d00;">
+            <td style="padding:0 32px 18px 32px;" class="mobile-padding">
+              <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;background:#ffffff;border:1px solid #d7dee8;border-radius:14px;">
                 <tr>
-                  <td style="padding:14px 16px 0 16px;font-family:Arial,Helvetica,sans-serif;font-size:12px;line-height:17px;color:#5c6675;">
-                    Thomas-Krenn-Wiki
+                  <td style="padding:18px 22px 4px 22px;font-family:Arial,Helvetica,sans-serif;font-size:12px;line-height:17px;color:#6a7688;font-weight:700;letter-spacing:.4px;text-transform:uppercase;">
+                    Wiki-Beitrag
                   </td>
                 </tr>
                 <tr>
-                  <td style="padding:4px 16px 6px 16px;font-family:Arial,Helvetica,sans-serif;font-size:21px;line-height:28px;font-weight:700;color:#ef7d00;">
-                    <a href="' . h($article['url']) . '" target="_blank" style="color:#ef7d00;text-decoration:none;">' . h($article['title']) . '</a>
+                  <td style="padding:0 22px 8px 22px;font-family:Arial,Helvetica,sans-serif;font-size:23px;line-height:31px;font-weight:700;color:#122845;">
+                    <a href="' . h($article['url']) . '" target="_blank" style="color:#122845;text-decoration:none;">' . h($article['title']) . '</a>
                   </td>
                 </tr>
                 <tr>
-                  <td style="padding:0 16px 12px 16px;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:21px;color:#313844;">
+                  <td style="padding:0 22px 16px 22px;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:22px;color:#334257;">
                     Veröffentlicht am ' . h($article['date_de']) . ' von ' . h($article['author']) . '.
                   </td>
                 </tr>
                 <tr>
-                  <td style="padding:0 16px 15px 16px;">
+                  <td style="padding:0 22px 20px 22px;">
                     <table role="presentation" border="0" cellspacing="0" cellpadding="0">
                       <tr>
                         <td bgcolor="#ef7d00" style="background:#ef7d00;">
-                          <a href="' . h($article['url']) . '" target="_blank" style="display:inline-block;padding:8px 14px;font-family:Arial,Helvetica,sans-serif;font-size:13px;line-height:16px;font-weight:700;color:#ffffff;text-decoration:none;">Jetzt Artikel lesen</a>
+                          <a href="' . h($article['url']) . '" target="_blank" style="display:inline-block;padding:11px 18px;font-family:Arial,Helvetica,sans-serif;font-size:13px;line-height:16px;font-weight:700;color:#ffffff;text-decoration:none;">Artikel lesen</a>
                         </td>
                       </tr>
                     </table>
@@ -408,10 +408,10 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
 
     $testBadge = $isTest
         ? '<tr>
-             <td style="padding:0 26px 12px 26px;" class="mobile-padding">
+             <td style="padding:0 32px 14px 32px;" class="mobile-padding">
                <table role="presentation" border="0" cellspacing="0" cellpadding="0">
                  <tr>
-                   <td bgcolor="#fff3cd" style="background:#fff3cd;border:1px solid #f3d38a;padding:6px 10px;font-family:Arial,Helvetica,sans-serif;font-size:11px;line-height:14px;font-weight:700;color:#7a5200;">
+                   <td bgcolor="#fff4e6" style="background:#fff4e6;border:1px solid #ffd2a3;padding:8px 12px;font-family:Arial,Helvetica,sans-serif;font-size:11px;line-height:14px;font-weight:700;color:#a34f00;">
                      TESTVERSAND
                    </td>
                  </tr>
@@ -434,7 +434,7 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <title>Thomas-Krenn Wiki Newsletter</title>
   <style type="text/css">
-    html, body { margin:0 !important; padding:0 !important; width:100% !important; background:#dadada; }
+    html, body { margin:0 !important; padding:0 !important; width:100% !important; background:#e8edf3; }
     table, td { border-collapse:collapse; mso-table-lspace:0pt; mso-table-rspace:0pt; }
     img { border:0; outline:none; text-decoration:none; -ms-interpolation-mode:bicubic; display:block; }
     a { text-decoration:none; }
@@ -442,46 +442,47 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
     .preheader { display:none !important; visibility:hidden; opacity:0; color:transparent; height:0; width:0; max-height:0; max-width:0; overflow:hidden; mso-hide:all; }
     @media only screen and (max-width: 680px) {
       .email-container { width:100% !important; }
-      .mobile-padding { padding-left:14px !important; padding-right:14px !important; }
-      .mobile-intro { font-size:16px !important; line-height:24px !important; }
+      .mobile-padding { padding-left:16px !important; padding-right:16px !important; }
+      .mobile-intro { font-size:16px !important; line-height:25px !important; }
+      .mobile-headline { font-size:30px !important; line-height:36px !important; }
+      .mobile-card-title { font-size:21px !important; line-height:28px !important; }
     }
   </style>
 </head>
-<body style="margin:0;padding:0;background:#dadada;">
+<body style="margin:0;padding:0;background:#e8edf3;">
   <div class="preheader">' . h($preheader) . '&nbsp;&zwnj;&nbsp;&zwnj;&nbsp;&zwnj;</div>
-  <center role="article" aria-roledescription="email" lang="de" style="width:100%;background:#dadada;">
-    <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" bgcolor="#dadada" style="width:100%;background:#dadada;">
+  <center role="article" aria-roledescription="email" lang="de" style="width:100%;background:#e8edf3;">
+    <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" bgcolor="#e8edf3" style="width:100%;background:#e8edf3;">
       <tr>
-        <td align="center" style="padding:12px 8px;">
-          <table role="presentation" width="690" border="0" cellspacing="0" cellpadding="0" class="email-container" style="width:100%;max-width:690px;background:#ffffff;">
+        <td align="center" style="padding:22px 10px;">
+          <table role="presentation" width="700" border="0" cellspacing="0" cellpadding="0" class="email-container" style="width:100%;max-width:700px;background:#ffffff;">
             <tr>
-              <td align="center" style="padding:8px 26px 14px 26px;">
-                <img src="https://www.thomas-krenn.com/res/pics/tk_logo_340px.png" width="170" alt="Thomas-Krenn Logo" style="display:block;margin:0 auto;border:0;outline:none;text-decoration:none;height:auto;">
+              <td align="center" style="padding:24px 32px 18px 32px;">
+                <img src="https://www.thomas-krenn.com/res/pics/tk_logo_340px.png" width="182" alt="Thomas-Krenn Logo" style="display:block;margin:0 auto;border:0;outline:none;text-decoration:none;height:auto;">
               </td>
             </tr>
             <tr>
-              <td style="padding:0 26px;" class="mobile-padding">
-                <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;background:#10233a;">
+              <td style="padding:0 32px;" class="mobile-padding">
+                <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;background:#102a46;">
                   <tr>
-                    <td style="padding:18px 18px 20px 18px;font-family:Arial,Helvetica,sans-serif;">
-                      <div style="font-size:13px;line-height:18px;font-weight:700;color:#ef7d00;letter-spacing:0.7px;">NEWSLETTER</div>
-                      <div style="font-size:20px;line-height:26px;font-weight:700;color:#ffffff;margin-top:2px;">' . h($periodLabel) . '</div>
+                    <td style="padding:30px 26px;font-family:Arial,Helvetica,sans-serif;">
+                      <div style="font-size:12px;line-height:16px;font-weight:700;color:#ef7d00;letter-spacing:1px;text-transform:uppercase;">Thomas-Krenn Wiki Update</div>
+                      <div class="mobile-headline" style="font-size:36px;line-height:42px;font-weight:700;color:#ffffff;margin-top:10px;">' . h($periodLabel) . '</div>
+                      <div style="font-size:16px;line-height:24px;color:#bfd0e2;margin-top:10px;">' . h($summaryText) . '</div>
                     </td>
                   </tr>
                 </table>
               </td>
             </tr>
             <tr>
-              <td style="padding:14px 26px 12px 26px;background:#eef0f3;" class="mobile-padding">
+              <td style="padding:22px 32px 22px 32px;" class="mobile-padding">
                 <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0">
                   <tr>
-                    <td class="mobile-intro" style="font-family:Arial,Helvetica,sans-serif;font-size:17px;line-height:27px;color:#1e2530;">
+                    <td class="mobile-intro" style="font-family:Arial,Helvetica,sans-serif;font-size:18px;line-height:29px;color:#22324a;">
                       Guten Tag,<br><br>
-                      hier erhalten Sie Ihre aktuelle Übersicht aus dem Thomas-Krenn-Wiki, ' . $dateRangeText . '.<br>
-                      ' . $summaryText . '<br><br>
-                      Viel Spaß beim Lesen wünscht<br>Ihr Team von Thomas-Krenn
+                      hier finden Sie die aktuellen Beitraege aus dem Thomas-Krenn-Wiki ' . $dateRangeText . '.<br>
+                      Alle Themen sind kuratiert, kompakt aufbereitet und direkt fuer Sie verlinkt.
                     </td>
-               
                   </tr>
                 </table>
               </td>
@@ -489,23 +490,25 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
             ' . $testBadge . '
             ' . $articleRows . '
             <tr>
-              <td style="padding:4px 26px 20px 26px;" class="mobile-padding">
+              <td style="padding:2px 32px 28px 32px;" class="mobile-padding">
                 <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0">
                   <tr>
-                    <td style="font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:22px;color:#2a303b;">
+                    <td style="font-family:Arial,Helvetica,sans-serif;font-size:15px;line-height:24px;color:#2a3950;">
                       Haben Sie Fragen oder einen Themenwunsch?
-                      <a href="' . h($replyHref) . '" style="color:#ef7d00;text-decoration:underline;">Kontaktieren Sie uns gerne direkt.</a>
+                      <a href="' . h($replyHref) . '" style="color:#ef7d00;text-decoration:underline;">Schreiben Sie uns gerne direkt.</a><br><br>
+                      Viele Gruesse<br>
+                      Ihr Thomas-Krenn Team
                     </td>
                   </tr>
                 </table>
               </td>
             </tr>
             <tr>
-              <td style="background:#eceef1;padding:20px 26px;text-align:center;font-family:Arial,Helvetica,sans-serif;">
-                <div style="font-size:12px;line-height:20px;color:#646d7b;">
+              <td style="background:#0f243d;padding:26px 26px;text-align:center;font-family:Arial,Helvetica,sans-serif;">
+                <div style="font-size:12px;line-height:20px;color:#b8c5d4;">
                   Tel.: +49 8551 9150 0 | Fax: +49 8551 9150 55<br>
                   <a href="https://www.thomas-krenn.com/de/wiki/Hauptseite" target="_blank" style="color:#ef7d00;text-decoration:underline;">thomas-krenn.com</a><br><br>
-                  Thomas-Krenn.AG | Speltenbach-Steinäcker 1 | D-94078 Freyung
+                  Thomas-Krenn.AG | Speltenbach-Steinaecker 1 | D-94078 Freyung
                   ' . $unsubscribeFooter . '
                 </div>
               </td>