body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
}
header, footer {
  text-align: center;
  padding: 20px;
  background: #0073e6;
  color: white;
}
main {
  padding: 20px;
}
form {
  margin: 20px 0;
}
input, textarea, button {
  display: block;
  margin: 10px 0;
  padding: 10px;
  width: 100%;
  max-width: 400px;
}
button {
  background: #0073e6;
  color: white;
  border: none;
  cursor: pointer;
}
button:hover {
  background: #005bb5;
}
#qrResult {
  margin-top: 20px;
}