Update theme css

[simonseres]

With the help of Codex I recreated the css to match the corporate identity, modernize the look and increase readability.

[FaHaGit]

I really like the layout! It has a much more modern look and is better organized than the old one.

A few comments:

• The table of contents could be better organized. The main chapters aren't immediately recognizable as such. Perhaps adding another border around the main chapters and subchapters would make them easier to distinguish visually.

• The footnote numbers in the description are misaligned.

• The clickable Chargebyte logo that appears when you hover over a heading doesn’t really make sense. I would remove the icon and either make the entire heading clickable or remove it entirely.

• Images now appear to be rounded off. The "Intention" logo e.g. is cropped in such a way that it appears rounded and no longer has a transparent area (Safety Notes section). This rounded cropping is also visible on other images.

• Image captions and, in some cases, images are no longer centered but left-aligned. Table captions are centered.

• In the "Peripheral Compatibility List", the tables are displayed with many line breaks because the layout is now narrower.

• In the column heading “Tested by chargebyte,” there are now large gaps between the individual words.

[FaHaGit]

See my comments