.main-menu {
padding: 0;
margin: 0;
}
.main-menu li{
list-style: none;
position: relative;
}
.main-menu a {
text-decoration: none;
background: #2980b9;
color: #ffffff;
display: block;
border-bottom: 2px solid #2c3e50;
padding: 10px 15px;
width: 170px;
}
.main-menu .sub-menu {
position: absolute;
left: 180px;
top: 0px;
z-index: 10;
padding: 0;
margin: 0;
}
.main-menu ul li a {
border-bottom: 2px solid #2ecc71;
background: #1abc9c;
}
.main-menu > .opened > a {
background: #1abc9c;
}