body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background-color: #333;
  color: #fff;
  padding: 20px;
}

nav ul {
  list-style: none;
  padding: 0;
}

nav ul li {
  display: inline;
  margin-right: 15px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
}

.banner {
  background-image: url('banner.jpg');
  background-size: cover;
  color: #fff;
  padding: 100px 20px;
  text-align: center;
}

.btn {
  background-color: #28a745;
  color: #fff;
  padding: 15px 25px;
[14:14, 06/06/2025] ChatGPT: text-decoration: none;
  border-radius: 5px;
}

footer {
  background-color: #f1f1f1;
  color: #333;
  text-align: center;
  padding: 10px;
}