diff --git a/resources/web/guide/21/21.css b/resources/web/guide/21/21.css
index b779a78cf..c844bc443 100644
--- a/resources/web/guide/21/21.css
+++ b/resources/web/guide/21/21.css
@@ -113,9 +113,10 @@
 {
 	display: none;
 	width: 400px;
-	border: 1px solid #000;
+	border-width: 1px;
+	border-style: solid;
 	border-radius: 4px;
-	background-color: #fff;	
+	background-color: inherit;	
 	position: absolute;
 	left: 50%;
 	top: 200px;
diff --git a/resources/web/guide/22/22.css b/resources/web/guide/22/22.css
index 49cb6fad5..8e835f807 100644
--- a/resources/web/guide/22/22.css
+++ b/resources/web/guide/22/22.css
@@ -80,9 +80,10 @@ input
 {
 	display: none;
 	width: 500px;
-	border: 1px solid #000;
+	border-width: 1px;
+	border-style: solid;
 	border-radius: 4px;
-	background-color: #fff;	
+	background-color: inherit;	
 	position: absolute;
 	left: 50%;
 	top: 200px;
diff --git a/resources/web/guide/23/23.css b/resources/web/guide/23/23.css
index 69be274f7..620a6f71c 100644
--- a/resources/web/guide/23/23.css
+++ b/resources/web/guide/23/23.css
@@ -80,9 +80,10 @@ input
 {
 	display: none;
 	width: 500px;
-	border: 1px solid #000;
+	border-width: 1px;
+	border-style: solid;
 	border-radius: 4px;
-	background-color: #fff;	
+	background-color: inherit;	
 	position: absolute;
 	left: 50%;
 	top: 200px;
diff --git a/resources/web/guide/24/24.css b/resources/web/guide/24/24.css
index 057a61b1c..5f9dfde0d 100644
--- a/resources/web/guide/24/24.css
+++ b/resources/web/guide/24/24.css
@@ -135,9 +135,10 @@
 {
 	display: none;
 	width: 400px;
-	border: 1px solid #000;
+	border-width: 1px;
+	border-style: solid;
 	border-radius: 4px;
-	background-color: #fff;	
+	background-color: inherit;	
 	position: absolute;
 	left: 50%;
 	top: 200px;
diff --git a/resources/web/guide/css/dark.css b/resources/web/guide/css/dark.css
index 8ad99bb3a..03df52fc5 100644
--- a/resources/web/guide/css/dark.css
+++ b/resources/web/guide/css/dark.css
@@ -1,6 +1,7 @@
 *
 {
 	color: #efeff0;
+	border-color: #B9B9BC;
 }
 
 body