@import url('https://cdn.jsdelivr.net/npm/hack-font@3.3.0/build/web/hack.min.css');

html {
  font-family: Helvetica, Arial, sans-serif;
}
.reveal code, .reveal pre {
  font-family: Hack
}
.reveal section img {
  background:none; border:none; box-shadow:none;
}