/* Small native icons, without an icon font or JavaScript library. */
.fa-facebook { display: inline-block; width: 1em; height: 1em; vertical-align: -0.125em; }
.fa-facebook::before {
 content: ""; display: block; width: 100%; height: 100%; background: currentColor;
 -webkit-mask: url("../images/facebook.svg") center / contain no-repeat;
 mask: url("../images/facebook.svg") center / contain no-repeat;
}