body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f5f7fa;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: #ffffff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  text-align: center;
  width: 100%;
  max-width: 400px;
}

h1 {
  margin-bottom: 1rem;
  color: #333;
}

input {
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  margin-bottom: 1rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  padding: 10px 20px;
  background-color: #0077cc;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  margin-bottom: 1rem;
  transition: background 0.3s;
}

button:hover {
  background-color: #005fa3;
}

#qr-code {
  margin: 1rem 0;
}

#downloadLink {
  display: none;
  text-decoration: none;
  background: #28a745;
  color: white;
  padding: 10px 15px;
  border-radius: 6px;
  font-size: 0.9rem;
}

#downloadLink:hover {
  background: #218838;
}