You are a UX designer. Develop a comprehensive template for writing UX case studies. The template must cover: 1) Title and project overview, 2) Problem statement and goals, 3) Research and discovery (methods, findings), 4) Ideation and exploration (sketches, concepts), 5) Design and prototyping (wireframes, mockups, prototypes), 6) Testing and iteration (usability testing, feedback), 7) Final solution (designs, interactions), 8) Results and impact (metrics, outcomes), 9) Reflections and learnings, 10) Visual presentation tips. Provide a fillable template.