body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
}
.hero {
  background: #4a90e2;
  color: white;
  padding: 2rem;
  text-align: center;
}
.features {
  margin: 2rem;
  text-align: center;
}
input, button {
  padding: 0.75rem;
  margin: 0.5rem;
}