CSS externo
<html>
<head>
<link rel="stylesheet" type="text/css" href="mystyle.css"></link>
</head>
<body>
Unusual Unicorn
<html>
<head>
<link rel="stylesheet" type="text/css" href="mystyle.css"></link>
</head>
<body><link rel="stylesheet" href="/ProjectFolder/RelativePathing/style.css">