body {
    font: 150% "Roboto", Verdana, sans-serif;
    background-color: #333;
    display: flex;
    justify-content: start;
    align-items:center;
    height: 100vh;
    margin: 0;
    color:#fff;
    overflow-x: hidden;
    text-align: center;
}

div{
    position: fixed;
    bottom: -38px;
    height: 50%;
    left: 0;
    right: 0;
    background: #444;
}