.fa-stack{position:relative;display:inline-block;width:2em;height:2em;line-height:2em;vertical-align:middle;}.fa-stack-1x,.fa-stack-2x{position:absolute;left:0;width:100%;text-align:center;}.fa-stack-1x{line-height:inherit;}.fa-stack-2x{font-size:2em;}.fa-inverse{color:#fff;}