"You can use .css files too" in shared-styles.html is uninformative

[Artur-]

How do you use css files? "It's inside some strange <custom-style> tag"

[pleku]

Should be clarified to how/where

[Artur-]

The comment is in shared-styles.html so maybe there

[pleku]

I meant that clarified in the code where you use your styles.css instead of just saying you can use something somewhere

[anasmi]

With the "re-write", there are now two style files : shared-styl.css and a separate one for the textField.
Assuming that the change has addressed the problem, closing the issue.