header  {
    width: 100%;
    height: 100vh;
    position: relative;
    background-color: #000000;
}

header .headline    {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    text-align: center;
    color: #ffffff;
    font-size: 3em;
}

header .headline p  {
    top: 60%;
    position: absolute;
}