body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
}

header {
  background-color: #ffffff;
  padding: 20px;
  text-align: center;
  border-bottom: 2px solid #eee;
}

h1 {
  margin: 0;
  color: #2c3e50;
}

.whatsapp-button {
  display: inline-block;
  margin-top: 10px;
  background: #25D366;
  color: white;
  padding: 10px 15px;
  text-decoration: none;
  border-radius: 5px;
}

main {
  padding: 20px;
}

section {
  margin-bottom: 30px;
}

footer {
  background: #ffffff;
  text-align: center;
  padding: 15px;
  font-size: 0.9em;
  border-top: 1px solid #ddd;
}