.spar-apply-to-cart-btn{
  background:#007cba;
  color:#fff;
  border:none;
  border-radius:4px;
  padding:6px 10px;
  cursor:pointer;
  float:right;
}
.spar-apply-to-cart-btn[disabled]{
  opacity:.7;
  cursor:not-allowed
}
.spar-apply-to-cart-btn.spar-apply-success{
  background:#28a745
}