MaryAylla/civicats-site ? reverse-engineered prompt

Build me a simple Spanish language website for a project called Civicats.

It should have a clean landing page and separate pages for Sobre, Metodología, Módulos, and Descargas, with a consistent header, navigation, and footer across the whole site. I want it to feel polished and easy to read on phones and desktop, with a modern but simple design.

Please make sure the pages are linked together properly, the content sections are laid out nicely, and any images, styles, and scripts are organized in the existing assets, css, and js folders. If you need to add small interactions or animations, keep them light and useful. Use current best practices for plain HTML, CSS, and JavaScript, and if you need anything from the web, look up the current docs online.