A 38-year-old woman from Delhi attends a cervical cancer screening camp. She is asymptomatic with no abnormal vaginal discharge or bleeding. Her cervix appears normal on speculum examination. Pap smear cytology shows koilocytes with irregular nuclear membranes and hyperchromatic nuclei. HPV testing is positive for HPV-18. Colposcopy-directed cervical biopsy reveals cervical intraepithelial neoplasia grade 2 (CIN 2) with intact basement membrane. Which of the following is the most appropriate next step in management?