KNACSS/sass/_library/_styling.scss

/* ----------------------------- */
/* ==Stylings (minor stylings)   */
/* ----------------------------- */

/* styling elements */
code,
kbd,
mark {
  border-radius: 2px;
}

kbd {
  padding: 0 2px;
  border: 1px solid #999;
}

pre {
  tab-size: 2;
}

code {
  padding: 2px 4px;
  background: rgba(0, 0, 0, 0.04);
  color: #b11;
}

pre code {
  padding: 0;
  background: none;
  color: inherit;
  border-radius: 0;
}

mark {
  padding: 2px 4px;
}

sup,
sub {
  vertical-align: 0;
}

sup {
  bottom: 1ex;
}

sub {
  top: 0.5ex;
}

blockquote {
  position: relative;
  padding-left: 3em;
  min-height: 2em;
}

blockquote::before {
  content: "\201C";
  position: absolute;
  left: 0;
  top: 0;
  font-family: georgia, serif;
  font-size: 5em;
  height: .4em;
  line-height: .9;
  color: rgba(0, 0, 0, .3);
}

blockquote > footer {
  margin-top: .75em;
  font-size: 0.9em;
  color: rgba(0, 0, 0, .7);

  &::before {
    content: "\2014 \0020";
  }
}

q {
  font-style: normal;
}

q,
.q {
  quotes: "“\00a0" "\00a0”";

  &:lang(fr) {
    quotes: "«\00a0" "\00a0»";
  }
}

hr {
  display: block;
  clear: both;
  height: 1px;
  margin: 1em 0 2em;
  padding: 0;
  border: 0;
  color: #ccc;
  background-color: #ccc;
}