Nice.
Now a little critique on the design...
I'm the guy that installs these, does the concrete, blah, blah.
The handrail should project 12" min. beyond the nose of the first step and 12" min. into the landing above.
You do need a landing. And there are minimum sizes for those.
Risers should not exceed 7" and treads should be 11" min (nose to nose).
If you are not going to be inspected, now that's another code book.