I think I have a very simple problem, but I have been pulling my hear for a while now and still have not found a solution...
I am using Atahualpa 3.5.3 and the Sidebar Login plugin.
My issue is that the login widget does not get the styles from the theme...
In the them, fonts are "Times", font color is yellow, backrgound is blue, and here is what I get.


As you can see (highlighted in red), this is not really getting the theme.
You can see the site (under development) here :http://jeanmichel.cazaux.free.fr/site-tb34/
Is there a compatibility issue somewhere or am I missing some simple WP concept here?
Many thanks in advance for your help.
JM