body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f7f7f7;
  color: #333;
  line-height: 1.6;
}
header {
  background: #25d366;
  color: white;
  padding: 2rem;
  text-align: center;
}
.cta-button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background: white;
  color: #25d366;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
}
.features, .cta {
  padding: 2rem;
  text-align: center;
}
.features ul {
  list-style: none;
  padding: 0;
}
.features li {
  margin: 0.5rem 0;
}
footer {
  background: #ddd;
  text-align: center;
  padding: 1rem;
}