body {
  font-family: system-ui, sans-serif;
  background: linear-gradient(135deg, #0a192f, #172a45);
  color: #ccd6f6;
  text-align: center;
  padding: 100px 20px;
}
.hero h1 {
  font-size: 2.5rem;
}
.hero span {
  color: #64ffda;
}
button {
  margin-top: 20px;
  padding: 10px 20px;
  border: none;
  background: #64ffda;
  color: #0a192f;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
}
button:hover {
  background: #52e0c4;
}