body, nav ul  {
  margin: 0;
  padding: 0;
  list-style: none;
}

nav {    
  display: inline-block;
  position: fixed;
  width: 100%;
  text-align: center;
  background-color: #111;
  vertical-align: top;
  top: -1px;
  opacity: 1;
  transition: 0.6s;
}

nav:hover {
	opacity: 1;
	transition: 0.01s;
	background-color: #111;
	transition: 0.3s;
	
}

.nav a {
  display: block; 
  background: #111; 
  color: #fff;
  text-decoration: none;
  padding: 0.7em 1.7em;
  text-transform: uppercase;
  font-size: 85%;
  letter-spacing: 3px;
  position: relative;
}

.nav{  
  vertical-align: top; 
  display: inline-block;
}

.nav li {
  position: relative;
}

.nav > li { 
  float: left; 
  margin-right: 1px; 
} 

.nav li:hover > a { 
  transition: 0.3s;
  background-color:#302f2f;
  color: #40d23b; 
}

 .nav ul {
  position: absolute;
  white-space: nowrap;
  z-index: 1;
  left: -99999em;
  background-color: #000;
  border: 2px solid #81D4FA;
  border-top: none;
}
.nav > li:hover > ul {
  left: auto;
  min-width: 100%;
}

.nav > li li:hover > ul { 
  left: 100%;
  top:-1px;
}

.nav > li:hover > a:first-child:nth-last-child(2):before {
  border: 5px solid transparent;  
}

.nav li li:hover > a:first-child:nth-last-child(2):before {
  border: 5px solid transparent; 
  right: 10px;
}

.prve{
  max-width:125px;
  min-width: 90px;
  border: 2px solid #81D4FA;
  border-bottom: none;
  border-top: none;
}

.druhe {
  max-width: 14px;
  min-width: 110px;
  border-right: 2px solid #81D4FA;
}