#sticky_arrow{

    display:inline;

    position:fixed;

    bottom:0;

    right:0;

    width:70px;

    height:70px;

    z-index: 100;

}

.bnb{

    background-color:grey;

}

body {
	background-color: #FAFAFA;
	color: #404040;
	line-height: 1.6;
	font-size: 19px;
	width: 700px;
	margin: auto;
	margin-top: 100px

	text-decoration-color: gray

}

ul {
	list-style-type: none;
}