.pm-proportional-font {
font-family: "IBM Plex Serif", sans-serif !important;
font-size: 12pt !important;
}
.pm-content p code.pm-code.pm-fixedwidth-font {
background-color: inherit !important;
padding: 0 2px;
color: #005cc5;
}
.pm-link-text-color {
color: #e36209 !important;
}
fonts/fonts/in rstudio themes folder~/.config/rstudio/themesMore than just fonts! Here's the whole prosemirror css base used by the IDE: https://github.com/rstudio/rstudio/blob/edd144e6c64f765f62716e57a31808597e92ab7e/src/gwt/panmirror/src/editor/src/editor/editor-theme.ts#L138-L345