AlfredoVargas2708/app ? reverse-engineered prompt

Build me a clean Vue 3 app starter that looks polished right away and is easy to expand.

I want a simple homepage with a nice header, a main content area, and a couple of reusable components so the app doesn’t feel empty. Please make it responsive, easy to read, and give it a modern feel with thoughtful spacing, colors, and typography. If it helps, set up a small example of basic interactive state so I can see how the app works and have a good foundation to build on.

Keep the code tidy and make sure it runs well with the usual dev, build, and lint checks. If you need to look up current docs online, go ahead.