body {
                font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
                background: linear-gradient(135deg, #6180a0 0%, #2c3e50 100%);
                height: 100vh;
                display: flex;
                justify-content: center;
                align-items: center;
            }
            .login-form {
                background: white;
                padding: 40px;
                border-radius: 15px;
                box-shadow: 0 10px 40px rgba(0,0,0,0.2);
                width: 350px;
            }
            .login-form h2 {
                color: #6180a0;
                margin-bottom: 20px;
                text-align: center;
            }
            .login-form input {
                width: 100%;
                padding: 12px;
                margin-bottom: 15px;
                border: 1px solid #ddd;
                border-radius: 5px;
            }
            .login-form button {
                width: 100%;
                padding: 12px;
                background: #6180a0;
                color: white;
                border: none;
                border-radius: 5px;
                cursor: pointer;
            }
            .error {
                color: red;
                text-align: center;
                margin-bottom: 15px;
            }