* {
  margin: 0;
  padding: 0;

}

ul {  
  list-style-type: none;
  width:100%;
    font-size:12px;
}

nav>ul {
  height: 30px;
  line-height: 30px;
  text-align: center;
  background-color: black;
 position: fixed;

}

nav>ul>li {
  display: inline-block;
  position: relative;
  background-color: black;
  border-radius: 5px;
  padding: 0 30px;
  
}

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

nav ul li a {
  text-decoration: none;
  display: block;
  color: cyan;
}

nav ul li a:hover {
  color: yellow;
}

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

nav>ul>li>ul>li {
  position: relative;
  background-color: black;

}

nav>ul>li>ul>li:hover>ul {
  display: block;
    width:100%;
}

nav>ul>li>ul>li>ul>li {
  background-color: black;
}

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