body {
  font-family: Arial, sans-serif;
  text-align: center;
  padding: 20px;
}
#qr img {
  margin: 20px auto;
  display: block;
}
textarea, input {
  width: 300px;
  margin: 10px;
  padding: 8px;
}
button {
  padding: 10px 20px;
  margin: 5px;
  cursor: pointer;
}