body {
  font-family: 'Arial', sans-serif;
  background-color: #f0f4f8;
  margin: 0;
  padding: 2rem;
  display: flex;
  justify-content: center;
}
.container {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 12px rgba(0,0,0,0.05);
  max-width: 480px;
  width: 100%;
  text-align: center;
}
h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}
.subtitle {
  font-size: 1rem;
  margin-bottom: 2rem;
  color: #555;
}
.button {
  display: block;
  background-color: #007bff;
  color: white;
  padding: 14px;
  margin: 10px 0;
  text-decoration: none;
  border-radius: 8px;
  font-size: 1.1rem;
  transition: background-color 0.3s;
}
.button:hover {
  background-color: #0056b3;
}