footer {
    font-family: 'Sofia Sans', sans-serif;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    text-align: center;
    padding: 3px 0;
    background-color: rgb(20, 20, 20);
    color: #fff;
}

@media only screen and (max-width: 320px) {
    footer {
        font-size: 1rem;
    }
}