body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  background: #f7faff;
  color: #333;
  line-height: 1.6;
}

header {
  text-align: center;
  background: #222;
  color: white;
  padding: 40px 20px;
}

.logo {
  max-width: 100px;
  margin-bottom: 10px;
}

main {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

.intro, .how, .chat, .cta {
  margin-bottom: 40px;
}

ul {
  padding-left: 20px;
}

.button {
  background: #00bcd4;
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
}

footer {
  background: #222;
  color: white;
  text-align: center;
  padding: 20px;
  font-size: 14px;
}