#pdp {
    position: absolute;
    bottom: 0;
    height: 85px;
    width: 100%;
    padding-top: 5px;
    background-color: #d3d2d2;
    text-align: center;
}

@media screen and (max-height: 850px) {
    #pdp {
        height: 80px;
        padding-top: 5px;
    }
}