open-consul/website/source/assets/stylesheets/_buttons.scss

//
// Button Styles
// --------------------------------------------------

.outline-btn{
  background-color: transparent;
  color: $white;
  border: 2px solid $white;
  border-radius: $btn-border-radius;
  text-decoration: none !important;
  @include transition(background-color .3s ease-in-out);

  &.purple{
    color: $purple;
    border: 2px solid $purple;
  }

  &:hover{
    color: $white;
    background-color: rgba(255, 255, 255, .2);
    @include transition(background-color .3s ease-in-out);

    &.purple{
      background-color: rgba(255, 255, 255, .5);
    }
  }
}

//dot animation on header main nav link hover
.li-under a::after {
  position: absolute;
  top: 68%;
  left: 50%;
  margin-left: -4px;
  width: 8px;
  height: 8px;
  background-color: $white;
  border-radius: 4px;
  content: '';
  opacity: 0;
  text-decoration: none;
  -webkit-transition: height 0.3s, opacity 0.3s, -webkit-transform 0.3s;
  -moz-transition: height 0.3s, opacity 0.3s, -moz-transform 0.3s;
  transition: height 0.3s, opacity 0.3s, transform 0.3s;
  -webkit-transform: translateY(-10px);
  -moz-transform: translateY(-10px);
  transform: translateY(-10px);
}

.li-under a:hover::after,
.li-under a:focus::after {
  opacity: .5;
  -webkit-transform: translateY(0px);
  -moz-transform: translateY(0px);
  transform: translateY(0px);
}