أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
To attached css file in html is this way..you do this..
<link rel="stylesheet" href="style.css" type="text/css" media="screen" />
put this line in the header part and name the style.css according to yours
<link href="css/style.css" rel="stylesheet" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css" media="screen" />