"Page background" is also on the "to do" list of Atlantis. But it seems that most existing EPUB readers do not support custom page background in EPUBs.
About character styles. I suppose there is some misunderstanding. Or we use different terminology. The present version of Atlantis Word Processor does not support character styles. I mean that you cannot create character styles through the GUI of Atlantis, apply them to fragments of your document, and save them with Atlantis to a document file. But when a MS Word or OpenOffice document contains formatting applied (maintained) through character styles, Atlantis is supposed to load this formatting from a document file correctly. Atlantis does "understand" character styles in document files created with other word processing applications. But when importing a document, Atlantis always converts any character-style-formatting to a direct formatting supported by Atlantis. If you have a document containing text fragments formatted with character styles, and Atlantis does not display it correctly, please email your document to
support@AtlantisWordProcessor.com.