footer {
    background-color: #aaaaaa;
    border-bottom: 1px solid #000;
    position: fixed;
    display: flex;
    justify-content: center;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    overflow: hidden;
    text-align: center;

    box-shadow: inset 0 10px 12px -10px  rgba(0,0,0,0.5); /* Schatten nach innen*/
}

footer div {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    padding: 0;
    margin: 0;
    line-height:1em;
}

@media screen and (min-width: 800px) {


}