body {
  margin: 0;
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background-color: #4d2c8b;
  color: rgb(5, 4, 4);
}

#reader {
  width: 90vw;
  max-width: 400px;
  aspect-ratio: 1;
  background: rgb(120, 94, 161);
  border-radius: 12px;
}