Self page

Well ok you can use Category blog layout item just setting full article content to show , why do you have problem with it?

This is not the problem...
I repeat the question:
"The real problem now is how to make these pages look the same as the default "one-page", how to "tell" these items (articles) to use the same style as if they were placed on home page."
Or in other words: i don't know how to define style for these articles, because they are simply spread from border to border, with no styling...

Please check: zwcad.mojastran.net/ (home page) and zwcad.mojastran.net/programska-oprema (subpage with articles from one category)...

Your articles are displayed as leading, can you display them normaly, set #leading to 0 in menu item settings

I have set #leading to 0 but it doesn't change the style of articles. They are still spread over the full width of the screen as if template style doesn't apply to these articles...

Add this css to layout.css:

DIV.blog{
max-width: 1140px;
margin: 0 auto;
text-align: center;
}

Thanks, that was it...