body {
  margin: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;

  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

button {
  margin-top: 16px;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  background: #38bdf8;
  color: #0f172a;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background: #0ea5e9;
}