.htaccess and SEO friendly urls

Hi everybody.
So I'm using a cde in .htaccess to remove php extension from the url:

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteCond %{REQUEST_URI} ^(.+)\.php$
RewriteRule (.*)\.php$ /$1 [R=301,L]

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It works fine. But I have some dynamic url I want to make SEO compliant. For instance, I would like that

wines?wine=bordeaux

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become

wines/bordeaux

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So I looked around and I found this to put in my .htaccess

RewriteCond %{THE_REQUEST} \s/vinos\.php\?v=(\w+)\s [NC]
RewriteRule ^ /vinos/%1? [R=301,L]
RewriteRule ^vinos/(\w+)$ /vinos.php?v=$1 [L]

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With this the url is rewritten as expected but in the page which is open php just doesn't work. And all css is lost...
Any idea about how can I remove the extension from the simple page and make dynamic urls seo friendly?
Thank you in advance for any suggestion :)