generate a css code for following code: <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Beauty Salon</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<header>
<div class="logo">Beauty Salon</div>
<nav>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="services.html">Services</a></li>
<li><a href="products.html">Products</a></li>
<li><a href="appointment.html">Book Appointment</a></li>
<li><a href="login.html">Login</a></li>
</ul>
</nav>
</header>
<main>
<section class="hero">
<h1>Your Beauty, Our Passion</h1>
<p>Experience luxury and relaxation at our premier salon</p>
<a href="appointment.html" class="btn">Book Now</a>
</section>
</main>
<footer>
<p>© 2023 Beauty Salon. All rights reserved.</p>
</footer>
<script src="script.js"></script>
</body>
</html>