:root {
            --success: #28a745;
            --warning: #ffc107;
            --danger: #dc3545;
            --light: #f8f9fa;
        }

        body {
            margin: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f0f4f8;
            color: #333;
        }