How do I use --css

[dwids]

I have my own css file "D:\usr\bin\data\kepub-style1.css". When I use pass it in to -css (Windows, Powershell Terminal) I get no errors, but the css is not in the new .epub

Kepubify v4.0.4

 $cssList = "D:\usr\bin\data\kepub-style.css"

& D:\usr\bin\kepubify.exe --css  $cssList (etc)

It says stringArray in the help; so I tried

$cssList = @(
"p { text-indent: 1.2em; margin: 0 0 1em 0; }",
"h1, h2 { page-break-before: always; text-align: center; }"
 )

But same result. Thanks!