#head nav > ul {
	display:flex;
    table-layout:auto;
    box-sizing: border-box;
  	width:100%;
}
#head nav > ul > li {
  flex:1 1 auto;
  xtext-align:center;
}

#head nav li {
  position:relative;
}
/*#head nav a {*/
#head a {
	padding:10px;
	display:block;
	white-space:nowrap;
}
#head li > ul {
	border:1px solid #eee;
	text-align:left;
	background-color:#fff;
	display: none;
	position: absolute;
	top: 100%;
	left: 0;
	min-width: 100%;
	z-index: 1;
}
#head li li > ul {
	top: -1px;
	left: calc(100% - 5px);
}
#head li > ul > li {
	border-bottom:1px solid #eee;
}
#head li:hover > ul {
	display:block;
}


#head li > ul {
	display:block; /* overwrite display */

    transition-property: opacity, visibility;
    transition-duration: .3s, 0s;
    transition-delay: 0s, .3s;

	visibility:hidden;
    opacity:0;
}
#head li:hover > ul {
    transition-delay: 0s, 0s;

	visibility:visible;
    opacity:1;
}