m3uplayer/belle.qss

QAbstractButton {
	color: white;
	border-radius: 10px;
	border-width: 1px;
	border-style: solid;
	border-color: rgb(110,110,110);
	padding: 5px;
	background-color: darkslategray;
}
QAbstractButton:checked, QAbstractButton:pressed {
	background-color: slategray;
}

QMainWindow, QMenu, QMenuBar, QMenuBar::item {
	color: white;
        background-color: black;
}