a1 {
  		text-decoration: none;
  		display: inline-block;
  		padding: 5px 10px;
		margin: 0 20px;
  		transition: .3s ease-in-out;
  		cursor: pointer;
	}
	.sa {
  		color:#000;
  		line-height: 1.2; 
  		position: relative; 
  		opacity: .75;
	}
	.sa:after {
  		content: "";
  		height: 100%;
  		min-width: 4px;
  		background: #34495e;
  		position: absolute;
  		left: 0;
  		bottom: 0;
  		transition: .5s;
	}
	.sa:hover:after {
  		min-width: 100%;
  		background: #95a5a6;
  		opacity: .35;
	}