body {
  margin: 0;
  font-family: 'Arial', sans-serif;
  background: #000;
  color: #fff;
  text-align: center;
}

header {
  background: #111;
  padding: 20px;
}

nav a {
  color: #00ffcc;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
}

.hero {
  padding: 80px 20px;
}

.button {
  background: #00ffcc;
  color: #000;
  padding: 12px 24px;
  border-radius: 4px;
  text-decoration: none;
  font-weight: bold;
}