.bcontent {
    margin-top: 10px;
}

ul{
	float: left;
	list-style-type: none;
	margin-top: 50px;
}
ul {
  position: -webkit-sticky; /* Safari */
  position: sticky;
  top: 0;
}
ul li{
	display: inline-block;
}

ul li a{
	text-decoration: none;
	color: #fff;
	padding: 20px 70px;
	border: 1px solid #fff;
	transition: 0.6s ease;
}

ul li a:hover{
	background-color: #fff;
	color: #000;
}

ul li.active a{background-color: #fff;
	color: #000;

}
body{
    background-image:url("https://ak.picdn.net/shutterstock/videos/9251384/thumb/2.jpg");
    background-size: cover;
    background-position: center;
    padding-bottom: 20px;
}