How to properly store block icons in the Flat schema?

Question

HTML

Welcome all! I use a simplified Flat file structure organization scheme. As I understand it, when using this scheme, a separate directory is created for each block, while the styles and scripts of all elements and modifiers are stored in one file.

Block: File Structure Diagram:
<input class="input input_type_seach">

common.blocks
--input
----input.css (File content: .input {} .input_type_seach{} )
----input.js

How to add an icon to this block?

<input class="input input_type_seach input_icon_user">

File structure scheme:

common.blocks
--input
----input.css (File content: .input {} .input_type_seach{} .input_icon_user{} )
----input.js
----input_icon_user.png

Is that how it works?