body {
  font-family: sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

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

#key-box {
  background: white;
  padding: 1rem;
  border: 1px solid #ccc;
  font-family: monospace;
  font-size: 1rem;
  width: 100%;
  max-width: 600px;
  word-break: break-all;
  margin-bottom: 1rem;
  border-radius: 6px;
}

.btn {
  background-color: #007bff;
  color: white;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin: 0 0.5rem;
  transition: background 0.3s ease;
}

.btn:hover {
  background-color: #0056b3;
}

.footer {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: #555;
  text-align: center;
}

.footer a {
  color: #007bff;
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.btns {
  display: flex;
  justify-content: center;
}