A YouTube thumbnail in a 16:9 format optimized for mobile, designed to generate clicks, featuring an extremely eye-catching design about unknowingly giving up rights and losing everything. A person signing a document with a calm expression. From the contract, icons of rights (hand, house, money) emerge, either moving away or breaking. A clause highlighted in red with a warning symbol. In the background, the same person in shock. Dark and dramatic background. Large, provocative text: 'CEDIÓ TODO' or 'ERROR LEGAL'. Realistic, cinematic style with high contrast.