lib/site/sign-in/btn-facebook/index.styl
.btn-facebook
color: #fff
background: #3b5998
background: unquote("linear-gradient(to bottom, #3b5998, #314b80)")
i
font-size: 1.3em
line-height: 0
position: relative
top: .1em
margin-right: .3em
&:hover
opacity .9
color #f7f7f7
&:active
opacity: 1
color: #f7f7f7
box-shadow: inset 0 0 8px rgba(#082665, .6)