body {
            font-family: 'Arial', sans-serif;
            background-color: #f4f4f9;
            margin: 0;
            padding: 0;
        }

        .container {
            width: 100%;
            max-width: 400px;
            margin: 100px auto;
            padding: 30px;
            background-color: #ffffff;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
            border-radius: 8px;
        }

        h2 {
            text-align: center;
            color: #333;
            margin-bottom: 20px;
        }

        label {
            font-size: 16px;
            color: #555;
            margin-bottom: 5px;
            margin-top: 10px;
        }

        input[type="text"], input[type="password"] {
            padding: 12px;
            margin: 8px 0 20px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 14px;
            width: 100%;
            box-sizing: border-box;
        }

        button {
            width: 100%;
            padding: 12px;
            background-color: #5cb85c;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
        }

        button:hover {
            background-color: #4cae4c;
        }

        .error-message {
            color: red;
            text-align: center;
            margin-top: 10px;
            font-size: 14px;
        }

        .alert {
            padding: 10px;
            margin-bottom: 10px;
            border-radius: 5px;
            text-align: center;
        }

        .alert-error {
            background-color: #f2dede;
            color: #a94442;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .container {
                width: 90%;
                padding: 15px;
            }

            button {
                font-size: 14px;
            }
        }
    </style>