.container {display: flex;align-items: center;justify-content: center;padding: 2rem;background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);min-height: 100vh;}.card {background: white;border-radius: 8px;padding: 1.5rem;box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);}