papercss/src/content/_code.scss

code {
  @include color('color', 'secondary');
  @include color('background-color', 'primary-shaded-70');
  border-radius: 3px;
  font-size: 80%;
  padding: 2px 4px;
}

kbd {
  @include color('color', 'primary-inverse');
  @include color('background-color', 'primary');
  border-radius: 3px;
  font-size: 80%;
  padding: 2px 4px;
}

pre {
  @include color('color', 'inverse-primary');
  @include color('background-color', 'primary-shaded-70');
  @include color('border-color', 'primary-shaded-50');

  border-radius: 3px;
  border-style: solid;
  border-width: 1px;
  display: block;
  font-size: 80%;
  line-height: 1.5;
  overflow-x: auto;
  padding: 1em;
  white-space: pre;
  word-break: break-all;
  word-wrap: break-word;

  code {
    @include color('color', 'inverse-primary');
    background: transparent;
    display: block;
    font-size: inherit;
    padding: initial;
    white-space: pre;
  }
}