function toggleUnitField(type) {
            console.log('[DEBUG] toggleUnitField called for type:', type);
            try {
                const cb = document.getElementById('unit_can_be_' + type);
                if (!cb) {
                    console.error('[DEBUG] Checkbox NOT found for type:', type);
                    return;
                }
                const isChecked = cb.checked;
                console.log('[DEBUG] isChecked:', isChecked);

                const resGrp = document.getElementById('group_' + type + '_res');
                const amtGrp = document.getElementById('group_' + type + '_amt');
                
                if (resGrp) {
                    resGrp.style.display = isChecked ? 'block' : 'none';
                }
                if (amtGrp) {
                    amtGrp.style.display = isChecked ? 'block' : 'none';
                }
            } catch (err) {
                console.error('[DEBUG] Error in toggleUnitField:', err);
            }
        }