Layout vereinheitlicht

history.php

@@ -168,7 +168,7 @@ include('inc/header.php');
                 $formatted_time = date('H:i', strtotime($meeting['date']));
                 ?>
 
-                <div class="card-header d-flex justify-content-between bg-secondary bg-opacity-25 text-dark align-items-center">
+                <div class="card-header bg-primary-subtle text-secondary d-flex justify-content-between align-items-center">
                     <div class="mb-0 fs-6 fs-md-5 fw-bold">
                         Treffen am <?= $weekday ?> <?= $formatted_date ?> um <?= $formatted_time ?> Uhr
                     </div>