.social-media-links a .icon.icon-hc-fw.icon-twitter::before {
    content: url("https://www.cornell.edu/assets/core/social-icons/twitter-x-logo-dark.svg");
    width: 12px;
    height: auto;
    display: block;
    margin: 0 auto;  
}

.superfooter a .icon.icon-hc-fw.icon-twitter::before{
    content: url("https://www.cornell.edu/assets/core/social-icons/twitter-x-logo.svg");
    width: 12px;
    height: auto;
    display: block;
    margin: 0 auto;
    
}