.bi {
  vertical-align: -.125em;
  fill: currentColor;
}


.dark div{
  
  border-bottom:solid 5px #000000;
  width:100%;
  height:50px;
}


.sticky-top2{
  position: -webkit-sticky;
	position: sticky;
	top: 85px;
	z-index: 100;
}
.sticky-top3{
  position: -webkit-sticky;
	position: fixed;
	top: 0px;
	z-index: 80;
	width: 100%;
	background-color: #ffffff;
	height: 120px;
}