I worked out a book using a pseudo-class of this type:
Code:
.initial:first-letter {
font-family: FoglihtenNo04;
font-size: 55px;
line-height: 40px;
color: #FFF;
background-color: #8342F4;
float: left;
padding: 20px 20px 10px 15px;
margin: 4px 10px 0 0;
}
leaving to a text style as shown in the jpg annex.
Choosing "Tools"->"Delete unused stylesheet-classes", shows the above mentioned stye as unused and to be deleted. This will eventually delete the whole style.
If I run epubcheck and w3c css validator, my style is not rejected, however, and the style also works on my reader. Is this a bug in Sigil?