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/* http://www.giphy.com/gifs/3o6ozldpkMnGJhVJja */

a {
	position: relative
}
	a:hover:after {
		width: 100%;
	}
		a:after {
			content: '';
			overflow: hidden;
			position: absolute;
			left: 0;
			bottom: -1px;
			display: block;
			width: 0;
			height: 1px;
			background: #000;
			transition: all 300ms cubic-bezier(.175,.885,.32,1.075);
		}