.a3-thin-footer {
    background: #000;
    color: #fff;
    padding: 6px 12px;
    font-size: 13px;
    text-align: center;
    position: static; /* or simply remove the position line entirely */
    z-index: 1; /* optional, can also remove */
}

.a3-thin-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}