zoodex/src/application.css

/* TODO: Switch out CSS dynamically on `gtk-application-prefer-dark-theme` property change */
#film-collation-menu row:selected {
	background-color : rgb( 0 0 0 / 0.08 ) ;
}
#series-collation-menu row:selected {
	background-color : rgb( 0 0 0 / 0.08 ) ;
}

#film-collation-menu row:not(:selected) image {
	opacity : 0 ;
}
#series-collation-menu row:not(:selected) image {
	opacity : 0 ;
}

.open-collection-item-button {
	font-weight : normal ;  /* No bold text by default for this kind of button */
}