body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: #f9f9f9; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; }
        .container { background: white; padding: 2rem; border-radius: 12px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); text-align: center; width: 300px; }
        button { background: #635bff; color: white; border: none; padding: 10px 20px; border-radius: 6px; cursor: pointer; font-weight: 600; margin-top: 10px; }
        button:hover { background: #4f46e5; }
        code { background: #eee; padding: 2px 4px; border-radius: 4px; }