body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f9f9f9;
  text-align: center;
  padding: 30px;
}

#game {
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  display: inline-block;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

button {
  margin: 10px;
  padding: 10px 20px;
  font-size: 16px;
}