body {
  background: #0f0f0f;
  color: #fff;
  font-family: Arial, sans-serif;
  text-align: center;
  padding: 40px;
}

input, button {
  padding: 10px 20px;
  font-size: 16px;
  margin: 10px;
  cursor: pointer;
}

button:hover {
  background: #333;
  color: #fff;
}