:root{
  --size-3:2rem;
  --size-4:1.5rem;
  --size-5:1.25rem;
  --size-6:1rem;
  --size-7:0.75rem;
  --size-8:0.5rem;
}
.button-expand{
  color:#fff!important;
  text-decoration: none!important;
}
.button-expand span{
  color: #fff;
  display: inline-block;
  text-align: center;
  width: 10px;
}
.is-marg-bt-5{ margin-bottom:var(--size-5)!important; }
.is-relative {
  position: relative;
}