customized Curl flashcard

Some Curl flashcard markup proposals in the testbed viewer :

See
 http://www.aule-browser.com/flashcards/flashcard-kanji-03.dcurl
for Curl desktop code or
 flashcards/flashcard-kanji-03.curl
to run a test in the browser.

The test markup is

{EmFontSize 36pt}
{CardFontSize 18pt}
{CardBackground "blue"}
{HiLight "red"}

    {FrontSide color="gold", 

 日本語の漢字は {KJ \u9801} がです。
}