mkdocs-material/material/partials/fonts.html

{% if config.extra.font != "none" %}
  {% set text = config.extra.get("font", {}).text | default("Roboto") %}
  {% set code = config.extra.get("font", {}).code | default("Roboto Mono") %}
  {% set font = text + ':300,400,400i,700|' + code | replace(' ', '+') %}
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family={{ font }}">
  <style>
    body, input {
      font-family: "{{ text }}", "Helvetica Neue", Helvetica, Arial, sans-serif;
    }
    pre, code, kbd {
      font-family: "{{ code }}", "Courier New", Courier, monospace;
    }
  </style>
{% endif %}
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
{% if config.extra.social %}
  <link rel="stylesheet" href="https://file.myfontastic.com/n6vo44Re5QaWo8oCKShBs7/icons.css">
{% endif %}