* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #4caf50 0%, #45a049 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .login-container {
            background: white;
            border-radius: 15px;
            box-shadow: 0 15px 35px rgba(76, 175, 80, 0.3);
            padding: 40px;
            width: 100%;
            max-width: 400px;
            text-align: center;
        }

        .login-header {
            margin-bottom: 30px;
        }

        .login-header h2 {
            color: #333;
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .login-header p {
            color: #333;
            font-size: 14px;
        }

        .error-message {
            background: #ffebee;
            color: #c62828;
            padding: 12px;
            border-radius: 8px;
            margin-bottom: 20px;
            border-left: 4px solid #f44336;
            text-align: left;
            font-size: 14px;
        }

        .form-group {
            margin-bottom: 25px;
            text-align: left;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 500;
            font-size: 14px;
        }

        .form-group input {
            width: 100%;
            padding: 15px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: white;
            color: #333;
        }

        .form-group input:focus {
            outline: none;
            border-color: #4caf50;
            background: white;
            box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
        }

        .login-button {
            width: 100%;
            padding: 15px;
            background: #4caf50;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .login-button:hover {
            background: #45a049;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(76, 175, 80, 0.3);
        }

        .login-button:active {
            transform: translateY(0);
        }


        /* Responsive Design */
        @media (max-width: 480px) {
            .login-container {
                padding: 30px 20px;
                margin: 10px;
            }

            .login-header h2 {
                font-size: 24px;
            }

            .form-group input,
            .login-button {
                padding: 12px;
                font-size: 14px;
            }
        }

        @media (max-width: 320px) {
            .login-container {
                padding: 25px 15px;
            }

            .login-header h2 {
                font-size: 20px;
            }
        }

        /* Dark mode support */
        @media (prefers-color-scheme: dark) {
            .login-container {
                background: #ffffffff;
                color: #fff;
            }

            .login-header h2 {
                color: #333;
            }

            .login-header p {
                color: #ccc;
            }

            .form-group label {
                color: #fff;
            }

            .form-group input {
                background: white;
                border-color: #555;
                color: #333;
            }

            .form-group input:focus {
                background: white;
                border-color: #4caf50;
            }

            .login-footer {
                border-top-color: #555;
                color: #ccc;
            }
        }

        /* Animation */
        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .login-container {
            animation: slideIn 0.5s ease-out;
        }