body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #001a44, #005eff);
  color: white;
  text-align: center;
}

header {
  padding: 60px 20px;
}

button {
  background: white;
  color: #001a44;
  padding: 12px 24px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
}

button:hover {
  background: #eee;
}