body {
    background: black;
    color: white;
    height: 800vh;
}

.affix-container {
    border: white;
    border: solid;
    height: 1000px;
    width: 400px;
    margin-top: 150vh;
    float: left;
}

.affix-container-de {
    border: white;
    border: solid;
    height: 1000px;
    width: 400px;
    margin-top: 200vh;
    float: left;
}

.affix {
    border-color: darkred !important;
    border: solid;
    text-align: center;
    width: 250px;
}