body {
  font-family: 'Arial', sans-serif;
  text-align: center;
  padding: 20px;
  background-color: #f4f4f4;
}

h1 {
  color: #333;
}

#qr-button {
  padding: 12px 24px;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 18px;
  cursor: pointer;
}

#qr-button:hover {
  background-color: #218838;
}

#reader {
  margin: 20px auto;
  width: 300px;
}

#result {
  margin-top: 20px;
  font-size: 16px;
  color: #444;
}