#nav > ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

#nav {
  width: 100%;
  margin: 20px auto 0px;
  z-index:9999;
}

#nav > ul > li {
  width: 160px;
  float: left;
  position: relative;
}

#nav > ul > li a {
  display: block;
  background: #FFF;
  color: #333;
  padding: 15px 0px;
  text-align: center;
  text-decoration: none;
  font-size:16px;
  transition:all 0.5s;
}

#nav > ul > li a:hover {box-shadow:inset 3px 3px 3px #DDD; }

#nav > ul > li:hover a + ul { /*    display: block;*/
}

#nav > ul > li > ul {
  position: absolute;
  width: 100%;
  left: 0px;
  top:70px;
  display: none;
}