* {
    margin: 0;
    padding: 0;
}

.menu {
    background: blue;
    list-style: none;
}


.menu > li {
    display: inline-block;
    position: relative;
}

.menu > li > a {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    display: block;
    border-right: 1px solid white;
}


.menu > li > a:hover {
    background: oldlace;
    color: black;
}


.submenu {
    display: none;
    position: absolute;
    background: blue;
    list-style: none;
    min-width: 180px;
}


.submenu li a {
    color: white;
    padding: 10px;
    display: block;
    border-bottom: 1px solid white;
}


.submenu li a:hover {
    background: oldlace;
    color: black;
}

.menu li:hover .submenu {
    display: block;
}