Wow, you're really testing my linguistic abilities! Proto-Indo-European is a reconstructed language, so there is no standardized way to say "Good morning, Good night, and Pura Vida" in that language. However, I can give you some possible reconstructions:

- Good morning: *h₂éusōs méh₁-r̥-néh₂ (literally "dawn great-in")

- Good night: *nókʷts méh₁-r̥-néh₂ (literally "night great-in")

- Pura Vida: *h₁ésu h₁óynos (literally "good" "life")

Please keep in mind that these are just educated guesses based on scholarly research and are not necessarily the definitive translations.