Sebastian Molina developed three core features for the jseoanesleon/reto-2 repository, focusing on front-end improvements using HTML, CSS, and Bootstrap. He overhauled navigation and branding by restructuring 1.html and 2.html, introducing a unified header with contact and social links, a structured main content area, and a detailed footer, which enhanced consistency and maintainability. Sebastian also created a dedicated product detail page for the Nintendo DS, integrating product information, images, and purchasing elements. His work included content updates for assignment and group tracking, emphasizing code hygiene and coherent HTML structure, resulting in a more polished and user-friendly product presentation.