A 6-year-old girl took paracetamol to treat a case of URTI two days ago, which resulted in the development of her present condition. The disease onset was acute with temperature increase up to 39.8°C. Objectively there are cockade-shaped maculopapular rashes on her face. The vermillion border is swollen, hyperemic, covered in massive brown crusts, and presents with bleeding cracks. Conjunctivitis is detected. Swollen and hyperemic oral mucosa presents with numerous erosions covered with fibrinous incrustations; the erosions are sharply painful on palpation. What is the most likely diagnosis?