body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #2c5364, #203a43, #0f2027);
  color: white;
  text-align: center;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: auto;
}

#reader {
  width: 100%;
  height: 300px;
  margin: 20px 0;
}

#output {
  background: #222;
  padding: 15px;
  border-radius: 10px;
}

button {
  margin-top: 10px;
  padding: 10px 20px;
  font-size: 16px;
  background: #00c9ff;
  border: none;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}