Show HN: Type Chart Calculator – Fast Pokemon type effectiveness lookup

  The problem: Existing type charts are either complex 18×18 tables or buried in wikis. When you're in a battle and need to know "what's Fire/Flying weak to?", you want an instant answer.                                                   
                                                                                                                                                                                                                                              
  The solution: A static-generated Next.js site with:                                                                                                                                                                                         
  - 43 SEO-optimized pages (18 single types + 20 popular combos)                                                                                                                                                                              
  - Default examples (Fire/Flying loads with results immediately)                                                                                                                                                                             
  - Quick example buttons (one-click to try popular combinations)                                                                                                                                                                             
  - Battle simulator with STAB calculations                                                                                                                                                                                                   
                                                                                                                                                                                                                                              
  Tech stack: Next.js 14, TypeScript, Tailwind CSS, fully SSG for <1s load times.                                                                                                                                                             
                                                                                                                                                                                                                                              
  Live: https://www.typematchup.org                                                                                                                                                                                                           
  Source: [if you want to open source it]                                                                                                                                                                                                     
                                                                                                                                                                                                                                              
  Would love feedback on the UX and any features competitive players would find useful!