/* vietnamese */
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 400;
  src: local('Source Sans Pro'), local('SourceSansPro-Regular'), url(http://fonts.gstatic.com/s/sourcesanspro/v9/ODelI1aHBYDBqgeIAH2zlNOAHFN6BivSraYkjhveRHY.woff2) format('woff2');
  unicode-range: U+0102-0103, U+1EA0-1EF1, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 400;
  src: local('Source Sans Pro'), local('SourceSansPro-Regular'), url(http://fonts.gstatic.com/s/sourcesanspro/v9/ODelI1aHBYDBqgeIAH2zlC2Q8seG17bfDXYR_jUsrzg.woff2) format('woff2');
  unicode-range: U+0100-024F, U+1E00-1EFF, U+20A0-20AB, U+20AD-20CF, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 400;
  src: local('Source Sans Pro'), local('SourceSansPro-Regular'), url(http://fonts.gstatic.com/s/sourcesanspro/v9/ODelI1aHBYDBqgeIAH2zlDKRFmJUU_JfdI4amS9F_UY.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215, U+E0FF, U+EFFD, U+F000;
}

.social {
  width: 60px;
  height: 120px;
  position: fixed;
  margin-top: 100px;
  margin-left: -25px;
  perspective: 1000px;
  list-style-type: none;
  z-index: 1;
}

.social li a {
  display: block;
  height: 20px;
  width: 30px;
  background: #222;
  border-bottom: 1px solid #333;
  font: normal normal normal
  16px/20px 
  'FontAwesome', 'Source Sans Pro', Helvetica, Arial, sans-serif;
  color: #fff;
  padding: 10px;
  text-decoration: none;
  text-align: right;
  transition: all .5s ease .300ms
}

.social li:first-child a:hover { color: #fff; background: #3b5998; width: 40px; }
.social li:nth-child(2) a:hover { color: #fff; background: #00acee; width: 40px; }
.social li:nth-child(3) a:hover { color: #fff; background: #dd4b39; width: 40px; }

.social li:first-child a { border-radius: 0 5px 0 0 }
.social li:nth-child(2) a { border-radius: 5px 0 0 0 }
.social li:last-child a { border-radius: 0 0 5px 0 }

.social li a span {
  width: 85px;
  float: left;
  text-align: center;
  background: #222;
  color: #fff;
  margin: -25px 54px;
  padding: 8px;
  transform-origin: 0;
  visibility: hidden;
  opacity: 0;
  transform: rotateY(45deg);
  border-radius: 5px;
  transition: all .5s ease .300ms
}

/*
.social li span:after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  position: absolute;
  left: -20px;
  top: 7px;
  border-left: 10px solid transparent;
  border-right: 10px solid #222;
  border-bottom: 10px solid transparent;
  border-top: 10px solid transparent;
}

.social li a:hover span {
  visibility: visible;
  opacity: 1;
  transform: rotateY(0)
}
*/