Most of the css worked. I fixed the blog issue by changing the template of the page. The default one was giving this weird response. Anyhow, many thanks!
Just one more question.
There is any way to downsize one or two titles for a specific woo-commerce product? The issue is, they don´t get align on the shop page on the bottom side. Just two of them are a little bit longer than the others. Or maybe, you have a better idea to solve this little detail?