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);
}