:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
}