body {
  font-family: sans-serif;
  background: #f5f5f5;
  display: flex;
  justify-content: center;
  padding: 40px;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 12px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h2 {
  text-align: center;
}

form label {
  display: block;
  margin: 12px 0 5px;
}

input {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
}

button {
  margin-top: 20px;
  padding: 10px;
  width: 100%;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #0056b3;
}

.code-group {
  display: flex;
  gap: 10px;
  align-items: center;
}

#message {
  margin-top: 20px;
  text-align: center;
  color: green;
}