Thanks for your kind reply.
1) into header.php, the function wp_head() is called AFTER theme CSS
This is the HTML page source: you can see that is correct as you suggested to me.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="https://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>Diamoci La Zampa » Cercano casa</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="generator" content="WordPress 3.5" /> <!-- leave this for stats -->
<link rel="stylesheet" href="https://www.diamocilazampa.it/public/wp/wp-content/themes/emerald-stretch/style.css" type="text/css" media="screen" />
<!--[if IE]><link rel="stylesheet" href="https://www.diamocilazampa.it/public/wp/wp-content/themes/emerald-stretch/ie.css" type="text/css" media="screen" /><![endif]-->
<link rel="pingback" href="https://www.diamocilazampa.it/public/wp/xmlrpc.php" />
<link rel="alternate" type="application/rss+xml" title="Diamoci La Zampa RSS 2.0 Feed" href="https://www.diamocilazampa.it/public/wp/index.php/feed/" />
<link rel="alternate" type="text/xml" title="Diamoci La Zampa RSS Feed" href="https://www.diamocilazampa.it/public/wp/index.php/feed/rss/" />
<link rel="alternate" type="application/atom+xml" title="Diamoci La Zampa Atom 0.3" href="https://www.diamocilazampa.it/public/wp/index.php/feed/atom/" />
<link rel="Shortcut Icon" href="https://www.diamocilazampa.it/public/wp/wp-content/themes/emerald-stretch/img/favicon.ico" type="image/x-icon" />
<link rel='stylesheet' id='admin-bar-css' href='https://www.diamocilazampa.it/public/wp/wp-includes/css/admin-bar.min.css?ver=3.5' type='text/css' media='all' />
<link rel='stylesheet' id='farbtastic-css' href='https://www.diamocilazampa.it/public/wp/wp-admin/css/farbtastic.css?ver=1.3u1' type='text/css' media='all' />
<link rel='stylesheet' id='post-tiles-css' href='https://www.diamocilazampa.it/public/wp/wp-content/plugins/post-tiles/post-tiles.css?ver=3.5' type='text/css' media='all' />
<link rel='stylesheet' id='wp-cpl-base-css-css' href='https://www.diamocilazampa.it/public/wp/wp-content/plugins/wp-category-posts-list/static/css/wp-cat-list-theme.css?ver=2.0.3' type='text/css' media='all' />'
2) I’ve added the code you suggested in previous post into my theme style.css
Nothing change (?!) even if I put the code at the beggining of .css or at the end.
Now, in my third example https://www.diamocilazampa.it/public/wp/index.php/cercano-casa/ I’ve added a category with white background. Now it’s readeable (obviously).
Notice that now in my examples there are a post without images.
Background is green and text white (as I wish). But if you go over with mouse pointer, text became green as background. I suppose that the problem is in .css into ‘hover’ properties.
So I’ve added into theme .css only the following code (I’ve not included your previous code):
#post-tiles li a:hover {
color: #ffffff !important;
}
And it works ! ??
The only problem is that the post title is in blue (I wish white).
Any idea ?