body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f9fafb;
  color: #111;
}

header {
  background: #111;
  color: #fff;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header nav a {
  color: #fff;
  margin-left: 15px;
  text-decoration: none;
}

.hero {
  text-align: center;
  padding: 60px 20px;
}

.btn {
  display: inline-block;
  background: #007bff;
  color: #fff;
  padding: 10px 16px;
  border-radius: 6px;
  text-decoration: none;
  margin-top: 15px;
}

footer {
  background: #111;
  color: #fff;
  text-align: center;
  padding: 15px;
  margin-top: 40px;
}