body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f2f2f2;
  text-align: center;
}

.hero {
  padding: 100px 20px;
  background: #4caf50;
  color: white;
}

.btn {
  padding: 12px 24px;
  background: white;
  color: #4caf50;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
}