.container {
  max-width: 400px;
  margin: auto;
  padding: 20px;
  background: #1e1e1e;
  color: #fff;
  font-family: sans-serif;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
  text-align: center;
}

.container h2 {
  margin-bottom: 10px;
}

.container input {
  width: 100%;
  padding: 10px;
  margin: 10px 0 15px;
  border: none;
  border-radius: 6px;
  background: #2c2c2c;
  color: white;
  font-size: 16px;
}

.container button {
  padding: 10px 20px;
  background: #4caf50;
  border: none;
  color: white;
  cursor: pointer;
  border-radius: 6px;
  font-size: 16px;
  transition: background 0.2s ease;
}

.container button:hover {
  background: #43a047;
}

.container #qr-output {
  margin-top: 20px;
}

.container a#download {
  display: inline-block;
  margin-top: 15px;
  padding: 10px 20px;
  background: #2196f3;
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  font-size: 16px;
  transition: background 0.2s ease;
}

.container a#download:hover {
  background: #1976d2;
}