gnome-shell/src/st/test-theme.css

stage {
}

#group1 {
    padding: 12pt;
    padding-right: 12px;
    padding-bottom: 2em;
    padding-left: 1in;

    background: #ff0000 url('some-background.png');
}

#text1 {
    background-image: inherit;
}

.special-text {
    font-size: 24pt;
    font-style: italic;
}

ClutterTexture.special-text {
    font-weight: bold;
}

#text2 {
    background: inherit;
    background: none; /* also overrides the color */
}

#group2 {
    font: italic 12px serif;
}

#text3 {
    font-variant: small-caps;
    font-weight: bold;
    font-style: oblique;
    font-size: 200%;
}

ClutterTexture {
    padding: 10px;
}

ClutterCairoTexture {
    padding-right: 20px;
}

#group1 > #text1 {
    color: #00ff00;
}

stage > #text2 {
    color: #ff0000;
}

#group2 {
    background-image: url('other-background.png');
}

ClutterText:hover {
    text-decoration: underline;
}

ClutterText:visited {
    color: #888888;
}