Tell us what’s happening:
Describe your issue in detail here.
**Your code so far**
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
</body>
</html>
**Your browser information:**
User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.5 Safari/605.1.15
Challenge: Learn CSS Variables by Building a City Skyline - Step 4
Link to the challenge: