/* nav */
.nav-menu,.nav-menu ul,.nav-menu li,.nav-menu a { margin: 0; padding: 0; line-height: normal; list-style: none; position: relative; }
.nav-menu ul { opacity: 0; position: absolute; top: 100%; left: -9999px; z-index: 999; -webkit-transition: opacity .3s; transition: opacity .3s; }
.nav-menu li:hover > ul { left: 0; opacity: 1; z-index: 1000; }
.nav-menu ul li:hover > ul { top: 0; left: 100%; }
.nav-menu li { cursor: default; float: left; white-space: nowrap; }
.nav-menu ul li { float: none; }

/* sub width */
.nav-menu ul { min-width: 12em; -webkit-box-shadow: 2px 2px 2px rgba(0,0,0,0.25); box-shadow: 2px 2px 2px rgba(0,0,0,0.25); }

/* center */
.nav-center { float: right; right: 50%; }
.nav-center > li { left: 50%; }