html,
body {
margin: 0;
padding: 0;
}
body {
width: 380px;
min-height: 280px;
padding: 10px;
font-family: “Arial”, sans-serif;
font-size: 14px;
line-height: 1.4;
background: #ecf0f1;
}
.main-menu{
margin: 0;
padding: 0;
list-style: none;
width: 200px;
}
.main-menu > li{
position: relative;
}
.main-menu a{
padding: 10px 15px;
border-bottom: 2px solid #2c3e50;
text-decoration: none;
color: white;
background-color: #2980b9;
display: block;
}
.main-menu a:hover{
background-color: #1abc9c;
}
.sub-menu{
padding: 0;
margin: 0;
position: absolute; top: 0; left: 180px;
z-index: 1;
list-style: none;
width: 200px;
}
.main-menu .opened > a{
background-color: #1abc9c;
}
.sub-menu a{
background-color: #1abc9c;
border-bottom: 2px solid #2ecc71;
}
.main-menu > .opened:hover .sub-menu{
display: block;
}