body {
  height: 100vh;
}

.bi {
  display: inline-block;
  vertical-align: -.125em;
  fill: currentcolor;
  width: 1em;
  height: 1em
}

.foother {
  background-color: #1d2024;
}

/*-xs-*/
@media (max-width: 576px) {
  .mb-xs-4 {
    margin-bottom: 1.5rem !important;
  }
}