lib/font-awesome-4.7.0/less/core.less
// Base Class Definition
// -------------------------
.@{fa-css-prefix} {
display: inline-block;
font: normal normal normal @fa-font-size-base/@fa-line-height-base FontAwesome; // shortening font declaration
font-size: inherit; // can't have font-size inherit on line above, so need to override
text-rendering: auto; // optimizelegibility throws things off #1094
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}