.ul_menu {
	list-style-type: none;
	margin: 0;
	padding: 0;
	overflow: hidden;
	background-color: #8f8787;
	position: sticky;
	top: 0;
	left: 0;
	z-index: 1;
}

.li_menu {
	float: left;
}

.li_menu a {
	display: block;
	color: white;
	text-align: center;
	font-size: 1.2em;
	padding: 17px 23px;
	text-decoration: none;
}

.li_menu a:hover:not(.active) {
	background-color: whitesmoke;
}

.active {
	background-color: whitesmoke;
}