body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f5f5;
  color: #111;
}

.hero {
  background: #0f172a;
  color: white;
  padding: 100px 20px;
  text-align: center;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  background: #0f766e;
  color: white;
  text-decoration: none;
  border-radius: 8px;
}

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