* { margin: 0; padding: 0; box-sizing: border-box; }
            body {
                font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
                background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                min-height: 100vh;
                display: flex;
                align-items: center;
                justify-content: center;
                padding: 20px;
            }
            .login-container {
                background: white;
                border-radius: 24px;
                box-shadow: 0 20px 40px rgba(0,0,0,0.1);
                width: 100%;
                max-width: 400px;
                padding: 40px;
                animation: fadeInUp 0.5s ease-out;
            }
            @keyframes fadeInUp {
                from { opacity: 0; transform: translateY(30px); }
                to { opacity: 1; transform: translateY(0); }
            }
            .login-container h2 {
                text-align: center;
                color: #1a1a2e;
                margin-bottom: 30px;
                font-size: 28px;
            }
            .login-container h2 i {
                color: #667eea;
                margin-right: 10px;
            }
            .input-group {
                margin-bottom: 20px;
            }
            .input-group label {
                display: block;
                margin-bottom: 8px;
                color: #4a5568;
                font-weight: 500;
            }
            .input-group label i {
                margin-right: 8px;
                color: #667eea;
                width: 20px;
            }
            .input-group input {
                width: 100%;
                padding: 12px 16px;
                border: 2px solid #e2e8f0;
                border-radius: 40px;
                font-size: 14px;
                transition: all 0.2s;
            }
            .input-group input:focus {
                outline: none;
                border-color: #667eea;
                box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
            }
            .btn-login {
                width: 100%;
                padding: 12px;
                background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                color: white;
                border: none;
                border-radius: 40px;
                font-size: 16px;
                font-weight: 600;
                cursor: pointer;
                transition: transform 0.2s;
            }
            .btn-login:hover {
                transform: translateY(-2px);
            }
            .btn-login i {
                margin-right: 8px;
            }
            .error-message {
                background: #fed7d7;
                color: #c53030;
                padding: 12px;
                border-radius: 40px;
                margin-bottom: 20px;
                text-align: center;
                font-size: 14px;
            }
            .error-message i {
                margin-right: 8px;
            }
            @media (max-width: 480px) {
                .login-container {
                    padding: 30px 24px;
                }
                .login-container h2 {
                    font-size: 24px;
                }
            }