.header-nav {
	background: white;
	text-align: center;
	position: absolute;
	z-index: 9999;
	display: none;
}
.header-nav a {
	text-decoration: none;
	display: block;
	transition: .5s linear;
}
.header-nav ul {
	list-style: none;
	margin: 0;
	padding: 0;
}
.header-top-menu > li {
	display: block;
	/*Если вместо block задать inline-block,
	меню будет горизонтальным*/
	position: relative;
	width: 255px;
}
.header-top-menu > li > a {
	font-weight: bold;
	padding: 10px 10px;
	font-size: 12px;
	text-transform: uppercase;
	letter-spacing: 2px;
	color: #1c1c1c;
	border: 1px solid #999;
}
.header-top-menu > li > a.has-submenu:after{
	content: "\f0da";
	display: inline-block;
	float: right;
	font-family: FontAwesome;
}
.header-sub-menu {
	position: absolute;
	right: -100%;
	top: 0px;
	z-index: 5;
	width: 240px;
	visibility: hidden;
	opacity: 0;
	transform: translateY(10px);
	transition: .5s ease-in-out;
}
.header-top-menu li>.header-sub-menu{
	right: -240px;
}
.header-sub-menu li {
	position: relative;
	border: 1px solid #999;
}
.header-sub-menu a {
	background: white;
	color: #1c1c1c;
	text-align: center;
	font-size: 14px;
	letter-spacing: 1px;
	padding: 10px 20px;
}
.header-sub-menu > li > a.has-submenu:after{
	content: "\f0da";
	display: inline-block;
	float: right;
	font-family: FontAwesome;
}
.header-sub-menu .header-sub-menu {
	position: absolute;
	top: 0;
	right: -100%;
}
.header-nav li:hover > .header-sub-menu {
	visibility: visible;
	opacity: 1;
	transform: translateY(0px);
}