footer {
    text-align: center;
}

.footer-content {
    background: #000;
 
    width: 100%;
}

.footer-content ul {
    list-style-type: none;
}

.footer-content li {
    text-align: center;
    display: inline-block;
    width: 10em;
}

.footer-content a {
    text-decoration: none;
    padding: 0.7em;
    color: #878787;
    margin: 0 1em;
}

.footer-content a:hover {
    background: #373737;
    color: #878787;
}

.copyright_text {
    height: 3em;
    background: #FFFFFF;
  
    width: 100%;
    color: #919191;
}

.content-middle-of-height {
    margin: 0;
    padding: 0;
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}