diff --git a/config/cfgroot/header.pl b/config/cfgroot/header.pl
index e62d351a4..a5cd5fbb1 100644
--- a/config/cfgroot/header.pl
+++ b/config/cfgroot/header.pl
@@ -340,19 +340,17 @@ sub closebigbox {
 # @param page align
 # @param page caption
 sub openbox {
-	$width = $_[0];
-	$align = $_[1];
-	$caption = $_[2];
+	# The width parameter is ignored and should always be '100%'
+	my $width = shift;
+	my $align = shift;
 
-	if($align eq 'center') {
-		print "<div class='post' align='center'>\n"
-	}
-	else {
-		print "<div class='post'>\n";
-	}
+	my $title = shift;
 
-	if ($caption) {
-		print "<h2>$caption</h2>\n";
+	print "<div class=\"box\">\n";
+
+	# Show the title
+	if ($title) {
+		print "	<h2 class=\"title\">${title}</h2>\n";
 	}
 }
 
diff --git a/html/html/themes/ipfire/include/css/style.css b/html/html/themes/ipfire/include/css/style.css
index 2cd47cfac..4c6db6a5c 100644
--- a/html/html/themes/ipfire/include/css/style.css
+++ b/html/html/themes/ipfire/include/css/style.css
@@ -163,6 +163,17 @@ iframe {
 	border-radius: 3px 3px 3px 3px;
 }
 
+.box {
+	border: 1px solid var(--color-grey);
+	padding: 0.75rem 1rem;
+	margin-bottom: 2rem;
+}
+
+.box .title {
+	margin-bottom: 1rem;
+	border-bottom: 1px solid var(--color-grey);
+}
+
 #main_inner {
 	padding-bottom: 1.5em;
 }
@@ -181,19 +192,6 @@ iframe {
 	margin-bottom: 1em;
 }
 
-#main_inner .post {
-	border: 1px solid silver;
-	padding: 1em 2em 1em 2em;
-	margin-bottom: 1em;
-	clear: both;
-}
-
-#main_inner .post h2 {
-	border-bottom: dotted 1px #e1e1e1;
-	font-size: 1.6em;
-	margin-bottom: 1em;
-}
-
 #main_header > * {
 	display: inline-block;
 	vertical-align: baseline;