img {
    width: 250px;
    border-radius: 50%;
    right: 10%;
    float: right;
}

#lebenslauf {
    float: left;
}

#top {
    justify-content: space-between;
    display: flex;
}

@media screen and (max-width: 500px) {
    img {
        width: 150px;
        border-radius: 50%;
        right: 10%;
        float: right;
    }
}