nav ul {
  list-style: none; 
  margin: 0; 
  padding: 0;
  background:#95be00;
}

nav > ul > li {
  float: left;
  /*background:#95be00;*/
  padding: 0 10px 0 10px;
  line-height: 25px;
}
nav li:hover {
  background:#abc;
}

nav > ul > li > ul {
  display: none;
}

nav > ul a {
  color: rgb(255, 255, 255);
  display: block; 
  white-space: nowrap;
  padding: 0 10px 0 10px;
}

nav ul > li > ul > li a {
  /*background:#95be00; color: rgb(255, 255, 255);*/
}

nav > ul {
  float: left;
  overflow: hidden;
  padding: 0 10px 0 10px;
}

nav > ul > li:hover > ul {
  display: block;
  position: absolute;
}

nav > ul > li > ul > li {
  /*background:#95be00;*/
  position: relative;
}

nav li > a:after {content: " +";}

nav li > a:only-child:after {content: "";}