r2c/user/themes/quark/scss/theme/_footer.scss

// Sticky Footer solution
body.sticky-footer {
  height: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;

  #page-wrapper {
    flex: 1 0 auto;
  }
}

#footer {
  color: #acb3c2;
  padding: 1rem $horiz-padding 0;
  text-align: center;
}