a {
    color: #FFF
    }
nav {
    margin-top: 1%;
    margin-left: 15%;
    z-index: 1000
    }
nav:after {
    content: "";
    display: table;
    clear: both
    }
nav ul {
    padding: 0;
    list-style: none;
    z-index: 1000
    }
nav ul li {
    margin: 0;
    display: inline-block;
    background-color: #212121;
    z-index: 1000
    }
nav a {
    display: block;
    padding: 0 20px;
    color: #FFF;
    font-size: 16px;
    line-height: 50px;
    text-decoration: none;
    z-index: 1000
    }
nav ul li ul li:hover {
    background: #212121
    }
nav a:hover {
    background-color: #454D46
    }
nav ul ul {
    display: none;
    position: absolute;
    top: 50px;
    z-index: 1000
    }
nav ul li:hover > ul {
    display: inherit
    }
nav ul ul li {
    width: 250px;
    float: none;
    display: list-item;
    position: relative;
    border-bottom: 1px solid lightblue;
    z-index: 1000
    }
nav ul ul ul li {
    position: relative;
    top: -50px;
    left: 0;
    z-index: 1000
    }