body #menu {
    width: 100vw;
    height: 50px;
}

body #menu ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

body #menu ul li {
    float: left;
}

body #menu ul li a {
    display: block;
    padding: 8px;
    padding-left: 10vw;
    padding-right: 10vw;
    background-color: skyblue;
    font-size: 18px;
    color: white;
}