.link-underline {
  position: relative;
  display: inline-block;
}

.link-underline::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: #000;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.link-underline:hover::after {
  transform: scaleX(1);
}