.fib,.fi {
  background-size: contain;
  background-position: 50%;
  background-repeat: no-repeat
}

.fi {
  position: relative;
  display: inline-block;
  width: 1.333333em;
  line-height: 1em
}

.fi:before {
  content: " "
}

.fi.fis {
  width: 1em
}

.fi {
  vertical-align: middle
}