body
{
    margin: 0;
    padding: 0;
}

html
{
    background-color: black;
}

.navbar ul
{
    background-color: cyan;
    display: flex;
    list-style-type: none;
    justify-content: center;
    left: 0;
    margin: 0;
    overflow: hidden;
    padding: 0;
    position: fixed;
    top: 0;
    width: 100%;
}

.navbar ul li
{
    float: left;
}

.navbar ul li a
{
    color: black;
    display: block;
    padding: 14px 16px;
    text-align: center;
    text-decoration: none;
}

.navbar ul li a:hover
{
    background-color: blue;
}

.text-block
{
    border: 2px solid blue;
    color: white;
    justify-content: center;
    margin-bottom: 5%;
    margin-left: 25%;
    margin-right: 25%;
    margin-top: 5%;
    padding: 10px 15px;
    text-align: center;
}