gle visibility and required attribute
        function toggleFields() {
            if (includeAllCheckbox.checked) {
                // Show exclude leave types, hide specific leave types
                specificLeaveGroup.style.display = 'none';
                excludeLeaveGroup.style.display = 'block';

                // Remove required attribute from specific leave field
                specificLeaveField.removeAttribute('required');
            } else {
                // Show specific leave types, hi