To include the CSS that you are using, use internal or external!
internal:
<!DOCTYPE html>
<html>
<head>
<style>
/*CSS here*/
</style>
</head>
<body>
</body>
</html>
or external
<!DOCTYPE html>
<html>
<head>
<link href="style.css" rel="stylesheet" charset="utf-8">
<!--Note - You don't have to use the charset, but I did it since I noticed you were using that enctype-->
<!--You would then put the CSS in the file you created titled CSS-->
</head>
<body>
</body>
</html>