body {
    background-color: black;
}

h1 {
    font-family:sans-serif;
    text-align: center;
    color:red;

}

p {
    font-size: 20px;
    text-align: center;
    color:white;
    font-family: sans-serif;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: red;
    position: -webkit-sticky;
    position : sticky;
    top: 0;
}

     li {
        float: left;
        border-right:1px solid black;
    }

    li:last-child {
        border-right:none;
    }

    li a {
        display: block;
        color: #000;
        padding: 8px 16px;
        text-decoration: none;
        color: black;
        font-family: Arial;
    }

    li a:hover {
        background-color: white;
        color: black;
    }

    dt {
        text-decoration: underline;
    }