Apply template html to nested subfolder

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1

Hu guys!
I have a structure of this.
How should I organize my layouts folder, so that html template would apply only to that files, that start with url/about/cases/case1/, url/about/cases/case2/ and so on. I can apply it to first level of subdirectory, but not to the nested one.

─content
|    └─ about
|            └─ en
|                    ├─_index.md
|                    ├─test1.md
|                    ├─test2.md
|                           └─cases
|                                 ├─_index.md
|                                 └─case1
|                                        ├─_index.md
|                                 └─case2
|                                        ├─_index.md
|─ layouts
|      └─ about????
|              └─ baseof.html

Thank you for the help in advance!

2 
content/
├── about/
│   ├── cases/
│   │   ├── case1/
│   │   │   ├── _index.md
│   │   │   ├── bar.md
│   │   │   └── foo.md
│   │   └── _index.md
│   └── _index.md   <-- cascade type = 'cases' 
└── _index.md

content/about/cases/_index.md

+++
title = 'Cases'
date = 2023-07-26T08:35:20-07:00
draft = false
[cascade]
type = 'cases'
+++

layouts/
├── _default/
│   ├── baseof.html
│   ├── home.html
│   ├── list.html
│   └── single.html
└── cases/
    ├── list.html
    └── single.html