#obd2-dtc-checker{max-width:600px;margin:20px auto;font-family:sans-serif}.obd-box{border:1px solid #ddd;padding:20px;border-radius:8px}.obd-input{width:100%;padding:10px;margin-bottom:10px}.obd-btn{background:#0073aa;color:#fff;padding:10px;border:none;cursor:pointer;width:100%}.obd-result{margin-top:20px;padding:15px;background:#f9f9f9}