Lotería is Mexico's bingo-with-pictures: a caller draws from 54 cards and sings a short verse (copla) for each. I built a web version: the caller shuffles and sings each card, and there's a printable tabla generator that makes non-repeating boards as a PDF in the browser (pdf-lib, no backend). Next.js on Netlify, voices from ElevenLabs. A service worker keeps the game playable offline once loaded. Feedback welcome.