.uk-heading-line::after {
  content: "";
  display: inline-block;
  width: calc(10% + 3em);
  height: .05em;
  background: #d8a533;
}
.uk-button-text::before {
  content: "";
  position: absolute;
  bottom: 1px;
  left: 0;
  right: 100%;
  z-index: -1;
  border-bottom:2px solid #d8a533;}