body {
  font-family: 'Roboto', sans-serif;
  font-size: 24px;
  background-color: #FFF;
  margin: 0;
  place-items: center;
  -webkit-tap-highlight-color: rgba(0, 0, 0, .05);
  -webkit-text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
}

.qrcode-container {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
}
.qrcode-container img {
  width: 100%;
}