body {
  font-family: -apple-system, sans-serif;
  margin: 0;
  background: #0f172a;
  color: white;
}

.hero {
  text-align: center;
  padding: 80px 20px;
}

h1 {
  font-size: 2.5rem;
}

.section {
  padding: 60px 20px;
  max-width: 800px;
  margin: auto;
}

.section.alt {
  background: #111827;
}

ul {
  line-height: 1.8;
}

.btn {
  background: #22c55e;
  border: none;
  padding: 15px 25px;
  font-size: 1rem;
  color: black;
  cursor: pointer;
  border-radius: 8px;
}

.btn.big {
  font-size: 1.2rem;
  padding: 18px 30px;
}

.cta {
  text-align: center;
  padding: 80px 20px;
}