.fade-1 {
  height: 1px;
  $color: #595B5C;
  color: $color;
  background-image: linear-gradient(
    90deg,
    rgba($color, 0),
    rgba($color, 1) 50%,
    rgba($color, 0) 100%);
}

.fade-2 {
  border-width: 0 0 1px;
  $color: #595B5C;
  color: $color;
  border-image: linear-gradient(
    90deg,
    rgba($color, 0),
    rgba($color, 1) 50%,
    rgba($color, 0) 100%) 0 0 100%;
  border-style: solid;
}