.fontawesome-colors {
    color: gray;
  }

.hidden {
    visibility: hidden;
}

@font-face {
    font-family: 'Fira Code';
    src: url("https://cdn.rawgit.com/dunovank/jupyter-themes/1e851888/jupyterthemes/fonts/monospace/firacode/firacode.otf") format("opentype");
}


.fc-output:before {
    font-family: 'Fira Code';
    content: '[1]';
    text-shadow: 0px 1px;
    font-size: 0.9em;
}