Cómo vincular CSS a HTML
<link rel="stylesheet" href="styles.css">
Unusual Unicorn
<link rel="stylesheet" href="styles.css">
<head>
<link rel="stylesheet" href="styles.css">
</head>
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="style.css"> <!--Copy this line of code-->
</head>
<body>
</body>
</html>
<head>
<link rel="stylesheet" href="../css.style">
</head>
<link rel="stylesheet" href="PathToYourFile.css">
<link rel="stylesheet" type="text/css" href="assets/css/theme.css"/>