.header-top-links .social ul li.icon-facebook, .footer-nav-infos .social ul li.icon-facebook {
    background: url(/sites/centrodametropole.fflch.usp.br/files/inline-images/Facebook.png) center no-repeat;
    background-size: contain;
}
.header-top-links .social ul li.icon-twitter, .footer-nav-infos .social ul li.icon-twitter {
    background: url(/sites/centrodametropole.fflch.usp.br/files/inline-images/Twitter.png) center no-repeat;
    background-size: contain;
}
.header-top-links .social ul li.icon-youtube, .footer-nav-infos .social ul li.icon-youtube {
    background: url(/sites/centrodametropole.fflch.usp.br/files/inline-images/Youtube.jpg) center no-repeat;
    background-size: contain;
}
.header-top-links .social ul li.icon-instagram, .footer-nav-infos .social ul li.icon-instagram {
    background: url(/sites/centrodametropole.fflch.usp.br/files/inline-images/Instagram.jpg) center no-repeat;
    background-size: contain;
}
.footer-nav-infos .social ul li.icon-linkedin {
    background: url(/sites/centrodametropole.fflch.usp.br/files/inline-images/icon-linkedin-logo.jpeg) center no-repeat;
    background-size: contain;
}