All it takes is to compare the configuration files of three different layouts to understand it.
Just look at the files and read. Every child can figure it out in a couple of minutes.
Check the default "debian-softwaves", "hello" and "light_red", for example.
No, you didn't, and you proved it in:
Those who could see the drawbacks of the theme would answer something like:
However, we are not stopping you from using an environment that you can appreciate, and we also never claimed that work can't be done in suboptimal environments. An efficient environment looks different. 
You didn't even download what I made especially for you and posted in another thread. Nobody else would want to have such a working environment. Easy to notice why if you try.
Curious about what? 
Screenshots of Thunar and SpaceFM are above, side-by-side, and even in an environment that you can appreciate.
Read explanations on links posted to help you and think before you write something like:
and
Thank you.
I was always wondering how something like:
https://techcrunch.com/2023/07/17/microsoft-lost-keys-government-hacked/
https://www.theguardian.com/business/2023/nov/08/half-of-australia-left-without-internet-or-phone-as-optus-crashes
https://www.datacenterdynamics.com/en/news/google-cloud-outage-brings-down-google-services-spotify-apex-snapchat-and-more/
https://techhq.com/2020/12/3-biggest-public-cloud-outages-of-2020/
... is possible. Now I know. Thanks.
Now, back to the topic.
If we think of the look of your original request, and if you think about it, you'll find out that:
- "debian-softwaves" has a one-line input field, just like the login screen in your example.
- "debian-softwaves" has a "built-in manual".
This means all you need to do is RTFM to position the input field in the right place on the screen and recolor it according to the background graphic and panel.
Backgrounds and panels can be easily made with Gimp. All it takes is some very basic image manipulation skills and some minimal planning.
This background is a remake of the one from your link. It is much bigger than the original.
