After my post of yesterday I have changed themes. I started this website with a very simple theme, had some wishes a few years ago that required a more fancy one, but now I again opted for a relatively basic theme that has a mobile version out-of-the-box.
The website looks roughly the same as before. The text colour I let to default black. Most noticeable will be that the pages are less wide. This mostly catches the eye on a wide screen. Other than that the menu has a different colour, the fonts are different and there is more space between two lines, especially in the sidebar. I moved the little image of Gangleri from the header to a sidebar, incorporating it with the Facebook link. This proved to prevent some issues in the mobile version.