Center align logo & pages

Hi,

I would like the logo of my blog to be in the middle of my page and also the “pages” (Home, About and so on) to be centered. By now the logo appears – depending on the number of pages I create – left near the pages.

Here is the website with a placeholder logo as it looks now: Galumbi Drinks & Mor

I want it to look like this: Model Page

I know that I have to edit my style.css somehow but I do not have any clue how. Since I’m new to blogging and to wordpress I hope to find help here.

Thanks in advance!

Sepo