#app {
  max-width: 600px;
  margin: 50px auto;
  text-align: center;
}

input {
  padding: 10px;
  font-size: 16px;
  width: 80%;
}

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

#response {
  margin-top: 20px;
  font-size: 18px;
  font-weight: bold;
}