tt-rss/lib/dijit/themes/nihilo/layout/ContentPane.css

/* ContentPane */

.nihilo .dijitContentPane {
    padding: 0;
}

/* nested layouts */
.nihilo .dijitTabContainerTop-dijitContentPane,
.nihilo .dijitTabContainerLeft-dijitContentPane,
.nihilo .dijitTabContainerRight-dijitContentPane,
.nihilo .dijitTabContainerBottom-dijitContentPane,
.nihilo .dijitAccordionContainer-dijitContentPane {
    background-color: #fff;
    padding: 5px;
}

.nihilo .dijitSplitContainer-dijitContentPane,
.nihilo .dijitBorderContainer-dijitContentPane {
    background-color: #fff;		/* override background-color setting on parent .dijitBorderContainer */
    padding: 5px;
}