@media screen and (min-width: 769px) {

.footer{
    background-color: #f4f4f4;
    margin-top: 5px;
    padding: 50px;
    text-align: center;
    color:gray;
}
}

@media screen and (max-width: 768px) {
.footer{
    background-color: #f4f4f4;
    margin-top: 5px;
    padding-top: 10px;
    padding-bottom: 10px;
    text-align: center;
    color:gray;
}
}