show one banner per line on mobile

css/style.css

@@ -462,4 +462,8 @@ button{
         width: 100%;
     }
 
+    #newestPost{
+        display: none;
+    }
+
 }
\ No newline at end of file

include/footer.php

@@ -9,7 +9,7 @@ include "../internal/mysql.php";
         <a href="/bildquellen.html">Bildquellen</a><br>
         <a href="/impressum.php">Impressum</a><br>
     </div>
-    <div>
+    <div id="newestPost">
         <h3>Neueste Beitr&auml;ge:</h3>
         <?php
         $result = $conn->query("SELECT * FROM posts order by id desc limit $footerMaxPost");