@Sakin: Thanks for your advice, I have tried it and it did´t work.
But in combination with an old advice by you as answer to a similar question I have combined it to this custom css settings for 1200px wide of the side:
@media screen and (min-width: 1200px) {
.site { width: 1200px; }
.wrapper { width: 1200px; }
#main { width: 820px; }
}
This is similar to that you send me but it need also the .site tag to work.
Now I have a last problem, regarding the light gray bar behind the primary menu. This is still full wide.
Unfortunately I´m not able to figure out the right css parameter to control this.
Can you support me with this information.
Remark from my side: I´m working on a german language file for the template. When this is finished I would like to give it to you, so the theme could be delivered also with germane language by you.
Regards from germany
Frank