nav {
    margin: 0 auto;
    position: inherit;
}
nav::after {
    display: block;
    content: '';
    clear: both;
}
nav ul {
    padding: 0;
    margin: 0;
    list-style: none;
}
nav ul li {
    float: left;
    position: relative;
    padding: 8px 3px;
}
nav ul li a {
    display: block;
    color: rgba(255, 255, 255, .9);
    text-decoration: none;
    cursor: pointer;
    transition: all .3s ease-in-out;
}
nav ul li a:hover,
nav ul li a:focus {
    color: #3cafea;
}
nav ul li ul li {
    min-width: 190px;
}
.nav ul li ul li:hover {
    background: #000000;
    color: #ffffff;
}