Rework of company logo for Graystack IT GmbH

C'est ce que Graystack IT GmbH recherchait dans leur logo design

We need a reworked logo for Graystack IT GmbH. We have a very basic logo created (mostly by AI), which did it for the startup time, but now we need it a "bit" more professional, although we are happy with general approach of the appended logo, which we use currently.

You can find our coming soon page on www.graystack.one to get an idea of our preferred colors.

So, what do we need in short:
1) A reworked logo for our product "Graystack IT GmbH" in following variants:
a) light and dark
b) logo only, which we can use for example as favicon and so on
c) logo + text version, which should become our standard logo Voir plus