.ul_menu_main {
	list-style-type: none;
	margin: 0;
	padding: 0;
	overflow: hidden;
	background: rgba(255, 255, 255, 0.56);
	box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
	backdrop-filter: blur(4.9px);
	-webkit-backdrop-filter: blur(4.9px);
	position: sticky;
	top: 0;
	left: 0;
	z-index: 1;
}

.li_menu_main {
	float: left;
}

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

.li_menu_main a:hover:not(.active) {
	background-color: transparent;
}

.active {
	background-color: #6495ED;
}