Due to some restrictions. It was necessary to remove the space in the css file name
@@ -1,6 +1,6 @@
<html>
<head>
- <link rel="stylesheet" type="text/css" href="Captive portal.css" />
+ <link rel="stylesheet" type="text/css" href="Captiveportal.css" />
<title>Captive portal</title>
</head>
<body>
