:root {
--icon-psychology: "data:image/svg+xml,";
--icon-astronomy: "data:image/svg+xml,";
--icon-technology: "data:image/svg+xml,";
--icon-biology: "data:image/svg+xml,";
--icon-history: "data:image/svg+xml,";
--icon-linguistics: "data:image/svg+xml,";
--icon-physics: "data:image/svg+xml,";
--icon-media: "data:image/svg+xml,";
--icon-chemistry: "data:image/svg+xml,";
--icon-neuroscience: "data:image/svg+xml,";
--icon-culture: "data:image/svg+xml,";
--icon-brain: "data:image/svg+xml,";
--icon-economics: "data:image/svg+xml,";
--icon-mathematics: "data:image/svg+xml,";
--icon-philosophy: "data:image/svg+xml,";
--icon-neurobiology: "data:image/svg+xml,";
--icon-genetics: "data:image/svg+xml,";
--icon-default: "data:image/svg+xml,";
}